• B.Sc. (1st Class) in Biology/Chemistry, University of Indore, India
• M.Sc. in Biochemistry, University of Indore, India
• M.Sc. in Environmental Technology and Management, Asian Institute of Technology, Thailand
• D.Tech.Sc. in Environmental Technology and Management, Asian Institute of Technology, Thailand

• Awarded scholarship by the Japanese Government for pursuing D. Tech. Sc. (Environmental Technology and Management) studies at the Asian Institute of Technology, Bangkok, Thailand
• Awarded scholarship by the Norwegian Government for pursuing M. Sc. (Environmental Technology and Management) studies at the Asian Institute of Technology, Bangkok, Thailand
• Awarded merit scholarship by the Ministry of Human Resources of the Government of India for pursuing M. Sc. (Biochemistry) studies at the University of Indore, Indore, India
• Secured first position in order of merit in the University of Indore in Master of Science (Biochemistry) program
• Secured eighth position in order of merit in the University of Indore in Bachelor of Science degree amongst about one thousand students
• High citation award, Thammasat University, 2013
• High citation award, Thammasat University, 2016

Adsorption, Bio-hydrogen production, Phytoremediation, Solid and hazardous waste management, Wastewater treatment

Removal of Heavy Metals and other Pollutants from Aqueous Solution/Sludges using Agriculture Waste Materials and other Low Cost Adsorbents

Agricultural wastes are unused resources, which in many cases present a serious problem of disposal. However, these waste materials can be used to remove toxic heavy metal and other pollutants from wastewater as they are capable of binding by adsorption, chelation, and ion exchange. The exchange properties of these wastes can be attributed to the presence of carboxylic, phenolic, and hydroxylic groups. In order to enhance cation exchange capacities, these groups may be modified by oxidation, carboxymethylation, acetylation, and phosphation. The utilization of agricultural by-products in treating the wastewater/sludges contaminated by heavy metals and other pollutants is an attractive area of research.

Biohydrogen Production

Hydrogen produced from biomass in a sustainable way is recognized as an important component of the fuel market for future low or non-carbon based energy systems. A combination of hydrogen with fuel cells can help in saving energy. Agro-industrial wastewater rich in organics can be used for biohydrogen production using a dark fermentation process. Biohydrogen production can be enhanced by using an enzyme which can degrade complex organics to simpler compounds. This can be coupled with a Microbial Fuel Cell (MFC). Microbial Fuel Cell (MFC), a bioreactor, can convert chemical energy in the chemical bonds in organic compounds into electrical energy through catalytic reactions of microorganisms under anaerobic conditions. Thus, waste can be changed to a clean source of energy.

Phytoremediation for Treatment of Wastewater/ Contaminated Soil

Phytoremediation uses plants to clean wastewater/contaminated sites. It is the use of plants to partially or substantially remediate selected contaminants in contaminated soil, sludge, sediment, ground water, surface water and wastewater. It utilizes a variety of plant biological processes and the physical characteristics of plants to aid in remediation. Phytoremediation is widely viewed as the ecologically viable alternative to the environmentally destructive physical remediation methods currently practiced. Plants have several endogenous genetic, biochemical, and physiological properties that make them ideal agents for soil and water remediation. Phytoremediation uses hyperaccumulator and accumulator plants that can remove excess heavy metals from contaminated soils, wastewater and sludge.

• 2000 - Present: SIIT
• 2000 : Post Doctoral Fellow, Urban Environmental Engineering and Management Program, School of Environment, Resources and Development, Asian Institute of Technology, Thailand
• 1993 - 1996: Research Associate, Urban Environmental Engineering and Management Program, School of Environment, Resources and Development, Asian Institute of Technology, Thailand
• 1990 - 1 991: Research Associate, Urban Environmental Engineering and Management Program, School of Environment, Resources and Development, Asian Institute of Technology, Thailand
• 1982 - 1990: Assistant Professor, Government Girls Post Graduate College, Indore, India

• Sandhya Babel and Hakk Dork (Sep 2021). Identification of Micro-plastic Contamination in Drinking Water Treatment Plants in Phnom Penh, Cambodia.  J. of Engineering Technological Sciences, Vol 53, No 3, 210307.
• Weligama Thuppahige Rasangika Thathsaranee and Sandhya Babel (2022). Environmental Impact of Organic Fraction of Municipal Solid Waste Treatment by Composting in Sri Lanka. Journal of Material cycles and waste management, Vol 24, pp 189-199.
• Nguyen Hoang Dung and Sandhya Babel (2022). Insights on microbial fuel cells for sustainable biological nitrogen removal from wastewater: A review.  Environmental Research, vol 204, 112095.
• Hanggara Sudrajat, Sri Hartuti, Sandhya Babel (2022). Mechanistic understanding of the increased photoactivity of TiO2 nanosheets upon tantalum doping. Physical Chemistry Chemical Physics (Royal Society of Chemistry), Vol 24, pp 995-1006.
• Yan Jhang Chen, Li Pang Wang, Sandhya Babel (2022). Sustainable Utilization of Sewage Sludge through the Synthesis of Liquid Fertilizer. Sustainability (MDPI), vol 14, no 387.
• Katekanya Tadsuwan, Sandhya Babel (April 2022). Microplastic abundance and removal via an ultrafiltration system coupled to a conventional municipal wastewater treatment plant in Thailand. Journal of Environmental Chemical Engineering, Vol 10, Issue 2, Article no 107142.
• Chamath D.Y. Yahampath Arachchige Don and Sandhya Babel (Dec 2021). Effects of ammonium concentration in the catholyte on electricity and algal biomass generation in a photosynthetic microbial fuel cell treating wastewater. Bioresource Technology Report, Vol 16, article no 100867.
• T.U. Habarakada Liyanage, and S. Babel (Jan-Feb 2022). Enhancement of Methane Production in Anaerobic Digestion of Food Waste using Thermal Pretreatment. Environment and Natural Resources Journal, Vol 20, No 1, pp 10-18.
• H.U E Imasha and Sandhya Babel (29 Sep 2021). Microplastics contamination in commercial Green Mussels from selected wet markets in Thailand. Archives of Environmental Contamination and Toxicology, Vol 81, No 3, pp 449-459. DOI 10.1007/s00244-021-00886-4
• Hanggara Sudrajat, Sandhya Babel, Sri Hartuti, Jakkapon Phanthuwongpakdee, Kritapas Laohhasurayotin, Truong K. Nguyen, and Hien D. Tong (3 Sep 2021). Origin of the overall water splitting activity over anatase Rh/Cr2O3@TiO2 following UV-pretreatment. International J of Hydrogen Energy, Vol 46, issue 61, 31228-31238.
• Ho, N.A.D., Babel, S. (2021). Bioelectrochemical technology for recovery of silver from contaminated aqueous solution: a review. Environmental Science and Pollution Research, Vol 28, pp 63480–63494.
• Bui Quoc Lap, Nguyen Hoai Nam, Bui Thi Kim Anh, Trinh Thi Thuy, Linh, Le Xuan Quang, Vu Duc Toan, Bui Thi Thanh Hang, Sandhya Babel, Thi-Thu-Hong Phan (May 2021). Monitoring water quality in Lien Son irrigation system of Vietnam and identification of potential pollution sources by using multivariate analysis. Water, Air, & Soil Pollution, Vol 232, 5, Article No. 187.
• Sandhya Babel, Putri A. Sekartaji and Hanggara Sudrajat (17 Feb 2021). ZnO nanoparticles for degradation of humic acid in water environment.  Environmental Science and Pollution Research, vol. 28, pp 31163-31173.
• Nguyen Thi Minh Trang, Ngo Anh Dao Ho, and Sandhya Babel (Dec 2021). Reuse of waste sludge from water treatment plants and fly ash for manufacturing of adobe bricks. Chemosphere, Vol. 284, Article No 131367.
• Jiraporn Yongpisanphop, Sandhya Babel, Maleeya Kruatrachue, Prayad Pokethitiyook (Sep 2020).  Pb phytostabilization by fast-growing trees inoculated with Pb-resistant plant growth-promoting endophytic bacterium. Pollution, Vol 6, issue 4, pp 923-934.
• Tadsuwan, Katekanya and Babel, Sandhya (2021). Microplastic contamination in a conventional wastewater treatment plant in Thailand.  Waste Management and Research, vol 39, issue 5, pp 754-761.
• C.D.Y. Yahampath Arachchige Don, S. Babel (2021). Cultivation of microalgae in a microbial fuel cell for enhanced bioelectricity generation treating wastewater: a comparative study of Chlorella vulgaris and Scenedesmus quadricauda. In proceedings of the International conference on sustainable Biowaste Management 2021 held at Hong Kong from April 12-15, 2021, pp 194-197.
• T. Alan, S. Thavitchaiyaporn, S. Khemananthakul, J. Phanthuwongpakdee, S. Babel (2021). Comparison of different adsorbents for iodate removal in water environment. In proceedings of the International conference on sustainable Biowaste Management 2021 held at Hong Kong from April 12-15, 2021, pp 252-255.
• P. Tat-Eiam, P. Pupuang, A. Chientachakul, A.T. Ta, S. Babel (2021). Occurrence of microplastics in commercially harvested blood cockles in Thailand. In proceedings of the International conference on sustainable Biowaste Management 2021 held at Hong Kong from April 12-15, 2021, pp 279-282.
• Chamath D.Y. Yahampath Arachchige Don and Sandhya Babel (5 May 2021). Comparing the performance of microbial fuel cell with mechanical aeration and photosynthetic aeration in the cathode chamber. International Journal of Hydrogen Energy, Vol 46, Issue 31, pp 16751-16761.
• Jakkapon Phanthuwongpakdee, Toyohiro Haritmoto, Sandhya Babel, Sumant Dwivedi, Kenji Takada, Tatsuo Kaneko (2021). Flame retardant transparent films of thermostable biopolyimide metal hybrids. Polymer Degradation and Stability, 188, Article No. 109571.
• Chamath D.Y. Yahampath Arachchige Don and Sandhya Babel (Sep 2021). Circulation of anodic effluent to the cathode chamber for subsequent treatment of wastewater in photosynthetic microbial fuel cell with generation of bioelectricity and algal biomass. Chemosphere, Vol. 278, Article No. 130455.
• Jakkapon Phanthuwongpakdee, Sandhya Babel, Tatsuo Kaneko (April 2021). Screening of New bio-based materials for radioactive iodide adsorption from water environment. J. of Water Process Engineering, Vol 40, article no 101955.
• Hanggara Sudrajata, Sri Hartuti, Sandhya Babel, Truong Khang Nguyen, and Hien Duy Tong (Feb 2021). SnO2/ZnO heterostructured nanorods: Structural properties and mechanistic insights into the enhanced photocatalytic activity. J of Physics and Chemistry of Solids, 149, Article number109762.
• Chamath D.Y. Yahampath Arachchige Don and Sandhya Babel (Feb 2021). Effects of organic loading on bioelectricity and micro-algal biomass production in microbial fuel cells using synthetic wastewater. J of Water Process Engineering, 39, Article number 101699.
• Kankanige, D., Babel, S., (April 2021). Contamination by ≥6.5 µm-sized microplastics and their removability in a conventional water treatment plant (WTP) in Thailand. J of Water Process Engineering, Vol 40, Article no. 101765.
• Jiraporn Yongpisanphop, Sandhya Babel, Futoshi Kurisu, Maleeya Kruatrachue and Prayad Pokethitiyook (December 2020). Isolation and characterization of Pb-resistant plant growth promoting endophytic bacteria and its role in Pb accumulation by fast-growing trees. Environmental Technology, 41, issue 27, pp 3598-3606.
• Anh Tuan Ta and Sandhya Babel (Dec 2020). Microplastics pollution with heavy metals in the aquaculture zone of the Chao Phraya River Estuary, Thailand. Marine Pollution Bulletin, 161, article number 111747.
• N. A. D. Ho and S. Babel (Oct 2020). Spontaneous reduction of low-potential silver(I) dithiosulfate complex in bioelectrochemical systems for recovery of silver and simultaneous electricity production. Environmental Technology, Vol 41, No 33, pp 3055-3068.
• Ta, A.T., Babel, S. (October 2020). Microplastic contamination on the lower Chao Phraya: Abundance, characteristics, and interaction with heavy metals.  Chemosphere, Vol 257, Article number 127234.
• Jiraporn Yongpisanphop, Sandhya Babel, Maleeya Kruatrachue, Prayad Pokethitiyook (Sep 2020).  Pb phytostabilization by fast-growing trees inoculated with Pb-resistant plant growth-promoting endophytic bacterium. Pollution, Vol 6, issue 4, pp 923-934.
• Jakkapon Phanthuwongpakdee, Sandhya Babel, Kritapas Laohhasurayotin, Suchinda Sattayaporn, Tatsuo Kaneko (Oct 2020). Anthocyanin based agricultural wastes as bio-adsorbents for scavenging radioactive iodide from aqueous environment. J of Environmental Chemical Engineering, Vol 8, Issue 5, Article number104147.
• Sudrajat, H., Babel, S., Ta., A.T., Nguyen., T.K (Sep 2020). Mn-doped TiO₂ photocatalysts: role, chemical identity, and local structure of dopant. J of Physics and Chemistry of Solids, 144, Article number 109517.
• Habarakada Liyange, T.U., Babel, S. (Sep 2020). Thermal, Ultrasonic and Electrochemical Pretreatment Methods to Enhance the Solubilization and Methane Generation in Food Waste. Journal of Material cycles and waste management, 22, issue 5, pp 1418-1426.
• Ngo Anh Dao Ho and Sandhya Babel (2020). “Functional components of a bio-electrochemical system for removal and recovery of metals: A review” in the book entitled  “Bioremediation, Nutrients, and other valuable product recovery: using Bioelectrochemical systems” chapter 8, pp 153 -183, edited by Lakhveer Singh, Durga Madhab Mahapatra and Sveta Thakur, Elsevier publisher. (Book Chapter)
• Ngo Anh Dao Ho and Sandhya Babel (2020). “Roles of inoculum and substrate in bioelectrochemical system used for removal and recovery of metals from wastewater” in the book entitled “Bioremediation, Nutrients, and other valuable product recovery: using Bioelectrochemical systems” chapter 11, pp 231-246, edited by Lakhveer Singh, Durga Madhab Mahapatra and Sveta Thakur, Elsevier publisher. (Book Chapter)
• Dikshya Dhakal and Sandhya Babel (2020). Arsenic Adsorption from Ground Water using Non-Toxic Waste as Adsorbent. Desalination and Water Treatment, Vol 185, pp 209-225.
• Indika Thushari and Sandhya Babel (2020). Biodiesel Production from Waste Palm Cooking Oil Using Solid Acid Catalyst Derived from Coconut Meal Residue. Waste and Biomass Valorization, Vol 11, No 9, pp 4941-4956.  https://doi.org/10.1007/s12649-019-00820-9.
• Anh Tuan Ta and Sandhya Babel and Andreas Haarstrick (2020). Microplastics Contamination in a High Population Density Area of the Chao Phraya River, Bangkok. J. of Engineering Technological Sciences, Vol 52, No 4, 534-545.
• Rawipa Intakul, Intiporn Viriyaparp, Saisuai Thanomrod, Anh Ta, Sandhya Babel (2020).  Microplastic Pollution in Highly Populated Area of Chao Phraya River, Tha Prachan, Bangkok. In Proceedings of 2020 Pure and Applied Chemistry International Conference (PACCON 2020) held at Bangkok, Thailand from February 13-14, 2020 (EC52-57).
• Apirak Suwanchalouy, Uttaporn Thongphichit, Phitchapa Khemvirat, Anh Ta, Sandhya Babel (2020). Investigations on microplastics as vectors for heavy metals in the water. In Proceedings of 2020 Pure and Applied Chemistry International Conference (PACCON 2020) held at Bangkok, Thailand from February 13-14, 2020 (EC58-62).
• Jakkapon Phanthuwongpakdee, Sandhya Babel, Sumant Dwivedi, Kenji Takada, Thawinda Kongprathet, and Tatsuo Kaneko (2020). Anion-scavenging Biopolyamides from Quasternized 4-Aminocinnamic Acid Photodimer. ACS Sustainable Chemistry & Engineering, vol 8, Issue 9, pp 3786-3795.
• Nicharee Srimora, Siranata Sudmoltin, Piyawat Sakpoonsup, Jakkapon Phanthuwongpakdee, Sandhya Babel (2020). Iodate Removal Using Low-Cost Absorbents for the Application of Radioactive Iodine Remediation in the Aqueous Environment. In Proceedings of 2020 Pure and Applied Chemistry International Conference (PACCON 2020) held at Bangkok, Thailand from February 13-14, 2020 (EC46-41).
• Dinuka Kankanige and Sandhya Babel (Feb 2020). Identification of Microplastics (MPs) in Conventional Tap Water Sourced from Thailand. J. of Engineering Technological Sciences, Vol 52, issue 1, pp 95-107.
• Jiraporn Yongpisanphop and Sandhya Babel (July-Sep 2020). Characterization of Pb-tolerant Plant-growth-promoting Endophytic Bacteria for Biosorption Potential, Isolated from Roots of Pb Excluders Grown in Different Habitats.  Environment and Natural Resources Journal, Vol 18, No. 3, pp 268-274.
• Anh Tuan Ta, Sandhya Babel (2019). Current status of microplastics in marine and freshwater environments. A book chapter published in “Water Perspectives in Emerging Countries, Focus Issue: Microplastics in water environment”. Published by Cuvillier Verlag Gottingen, Germany. Editors S. Babel, A. Haarstrick, M. S. Babel, A. Sharp, pp 1-13. (Book Chapter)
• S. Babel, A. Haarstrick, M. S. Babel, A. Sharp (editors) (2019). Water Perspectives in Emerging Countries, Focus Issue: Microplastics in water environment. Published by Cuvillier Verlag Gottingen, Germany. (Book)
• Jakkapon Phanthuwongpakdee, Sandhya Babel and Tatsuo Kaneko (2019). A book chapter entitled “Natural Adsorbents for Removal of Different Iodine Species from Aqueous Environment: A Review” published in “Recent trends in wastewater treatment and water resource management publisher Springer Editors Sadhan Kumar Ghosh, Papita Das Saha and Maria Frances Di. pp 171-198, ISBN 978-981-15-0706-9 (eBook)
• Teshan Udayanga Habarakada Liyanage and Sandhya Babel (2019). Enhancement of Methane Production in Anaerobic Digestion of Food Waste using Thermal Pre-treatment. In proceedings of 9^th ICONSWM Waste management towards circular economy held at Bhubaneshwar, Odisha, India from November 27-30, 2019, pp 23-29.
• Dinuka Kankanige & Sandhya Babel (2019). Identification of ≥50 micron-sized plastics (MPs) in conventional tap water sourced from Thailand. In abstract book of the Water Security and Climate Change Conference 2019 held at San Louis Potosi, Mexico from 28-30 October 2019.
• A. T. Ta and S. Babel. Microplastic contamination in freshwater environment: A case study in Chao Phraya River, Bangkok. In proceedings of International conference on sustainable design and climate change adaptation held at design Vanlang university, Ho Chi Minh city, Vietnam on April 10, 2019, pp 69-72.
• Sandhya Babel, Anh Tuan Ta and Teshan Udayanga Habarakada Liyanage (2019). A book chapter entitled “Current Situation and Challenges of Waste Management in Thailand” published in book “Sustainable Waste Management Challenges in Developing Countries”, pp 409-440.  Publisher IGI Global, USA. (Book Chapter)
• Anh Ta and Sandhya Babel (2019).  Microplastic pollution in surface water of the Chao Phraya River in Ang Thong area. Environment Asia (Special issue), Volume 12, pp 48-53.
• A. T. Ta and S. Babel (2019). Utilization of green waste from vegetable market for biomethane production: Influences of feedstock to inoculum ratios and alkalinity. Journal of Material cycles and waste management. Vol 21, 6, pp 1391-1401.  https://doi.org/10.1007/s10163-019-00898-2
• Ngo Anh Dao Hoa and Sandhya Babel (Sep 2019) Electrochemical reduction of different Ag(I)- containing solutions in bioelectrochemical systems for recovery of silver and simultaneous power generation. RSC Advances (Royal Society of Chemistry), Vol 9, pp 30259 – 30268.
• Sudrajat Hanggara, Dhakal Dikshya, Kitta Mitsunori, SasakiTakuro, Ozawa Akiyo, Babel Sandhya, Yoshida Tomoko, Ichikuni Nobuyuki, Onishi Hiroshi (2019) Electron Population and Water Splitting Activity Controlled by Strontium Cations Doped in KTaO3 Photocatalyst. The Journal of Physical Chemistry-C, Vol 123, 30, pp 18387-18397.
• Hanggara Sudrajat, Sandhya Babel, Jakkapon Phanthuwongpakdee, and Truong Khang Nguyen (Oct 2019). Local structure of iron oxide sensitizing Nb2O5 photocatalysts. Journal of Alloys and Compounds, vol. 806, pp 543-552.
• Hanggara Sudrajat and Sandhya Babel (April 2019). Loading of metallic silver onto ZnO for enhancement of electron population and photocatalytic activity.  International Journal for Light and Electron Optics (Optik), Vol. 183, pp 472-482.
• Hanggara Sudrajat and Sandhya Babel (4 Feb 2019). Ultrahigh photoactivity of ZnO nanoparticles for decomposition of high concentration microcystin-LR in water environment. International Journal of Environmental Science and Technology, Vol 16, 2, pp 695-706.
• Wang, Janice; Jeerawat Chuachan; Kritsana Patanaprasitchai; Jakkapon Phanthuwongpakdee; Tatsuo Kaneko; Kenji Takada; Sandhya Babel (2019). Bio-based polyimide for metal ions removal from aqueous solution. In Proceedings of the Pure and Applied Chemistry International Conference 2019 (PACCON2019), 7-8 February 2019, Bangkok, Thailand, pp. EE64-EE70.
• Wasinee Charoenchang; Chanaporn Phruksarudee; Chadaporn Chanawan; Jakkapon Phanthuwongpakdee; Sandhya Babel (2019). Iodide removal using anthocyanin-based adsorbent for the application of radioactive iodine remediation in the water environment. In Proceedings of the Pure and Applied Chemistry International Conference 2019 (PACCON2019), 7-8 February 2019, Bangkok, Thailand, pp. EE57-EE63.
• Kankanige, Dinuka and Sandhya Babel (2019). Identification of micro-plastics in different brands of bottled water in Thailand. In Proceeding of the 5th EnvironmentAsia International Conference (EnvironmentAsia 2019), 13-15 June 2019, Chiang Mai, Thailand, pp. V-152 - V-167.
• Ta, Anh and Sandhya Babel (2019). Microplastic pollution in surface water of the Chao Phraya River in Ang Thong area. In Proceeding of the 5th EnvironmentAsia International Conference (EnvironmentAsia 2019), 13-15 June 2019, Chiang Mai, Thailand, pp. V-179 - V-188.
• Katekanya Tadsuwan and Sandhya Babel (2019). Microplastic contamination in Din Daeng wastewater treatment plant. In Proceeding of the 5th EnvironmentAsia International Conference (EnvironmentAsia 2019), 13-15 June 2019, Chiang Mai, Thailand, pp. V-56 - V-64.
• Thushari, Indika and Sandhya Babel (2019). Activity of Carbon-Based Solid Acid Catalyst Derived from Palm Empty Fruit Bunch for Esterification of Palmitic Acid. Environment and Natural Resource Journal, Vol. 17, No. 1, 2019, pp. 54-62.
• Sudrajat, Hanggara; Sandhya Babel; Indika Thushari; Kritapas Laohhasurayotin (2019). Stability of La dopants in NaTaO₃ photocatalysts, Journal of Alloys and Compounds, Vol. 775, 2019, pp. 1277-1285.
• Thushari, Indika; Sandhya Babel; Chanatip Samart (2019). Biodiesel production in an autoclave reactor using waste palm oil and coconut coir husk derived catalyst, Renewable Energy, Vol. 134, 2019, pp. 125-134.
• Sudrajat, Hanggara; Indika Thushari; Sandhya Babel (2019). Chemical state and coordination structure of La cations doped in KTaO₃ photocatalysts, Journal of Physics and Chemistry of Solids, Vol. 27, April 2019, pp. 94-100.
• Ho, Ngo Anh Dao and Sandhya Babel (2018). Bioelectrochemical system for recovery of silver and electricity production from different Ag(I)-containing solutions. In Proceedings of 8th International conference on Sustainable Waste Management, 22-25 November 2018, Vijaywada, India, Vol. 2, 2018, pp. 1014-1020.
• Jakkapon Phanthuwongpakdee; Sandhya Babel; Tatsuo Kaneko (2018). Adsorption of Iodide in the Water by Natural Products and Waste Biomass for the Application of Radioactive Iodide Remediation. In Proceedings of 8th International conference on Sustainable Waste Management, 22-25 November 2018, Vijaywada, India, Vol. 2, 2018, pp. 1016-1013.
• Ta, Anh Tuan and Sandhya Babel (2018). Renewable energy generation by anaerobic digestion of mixed vegetable waste in a lab-scale BIOCEL reactor. In Proceedings of the Water Security and climate change conference (WSCC 2018), 3-5 December 2018, Nairobi, Kenya, Paper ID 130, pp. 146. (Abstract book)
• Dhakal, Dikshya and Sandhya Babel (2018). Locally available material as adsorbent to treat arsenic contaminated water. In Proceeding of 5th IET International Conference on Clean Energy and Technology (CEAT 2018), 5-6 September 2018, Kuala Lumpur, Malaysia, Paper ID 157458555, 5 p.
• Boontham, Weetara and Sandhya Babel (2018). Removal of lead from aqueous solution using low-cost adsorbents from Apiaceae family, Desalination and Water Treatment, Vol. 130, October 2018, pp. 182-193.
• Thushari, Indika and Sandhya Babel (2018). Preparation of solid acid catalysts from waste biomass and their application for microwave-assisted biodiesel production from waste palm oil, Waste Management & Research, Vol. 36, No. 8, August 2018, pp. 719-728.
• Ho, Ngo Anh Dao; Sandhya Babel; Korakot Sombatmankhong (2018). Bio-electrochemical system for recovery of silver coupled with power generation and wastewater treatment from ammonia chelated solution, Journal of Water Process Engineering, Vol. 23, June 2018, pp. 186-194.
• Thushari, Indika and Sandhya Babel (2018). Sustainable utilization of waste palm oil and sulfonated carbon catalyst derived from coconut meal residue for biodiesel production, Bioresource Technology, 248, pp. 199-203.
• Thushari, P.G.I. and Sandhya Babel (2018). Biodiesel production from waste palm oil using palm empty fruit bunch derived novel carbon acid catalyst, Journal of Energy Resources Technology (Transactions of ASME), Vol. 140, March 2018, pp. 032204-1 - 032204-10.
• Sudrajat, Hanggara; and Sandhya Babel (2017). Role of reactive species in the photocatalytic degradation of amaranth by highly active N-doped WO₃, Bulletin of Materials Science, Vol. 40, No. 7, December 2017, pp. 1421-1428.
• Aukrawut Seenuan; Thatapol Charoensukpatana; Natcha Chamchoy; Anh Dao Ngo Ho; and Sandhya Babel (2017). Recovery of silver from mixed metals solution using a bio-electrochemical system. Science & Technology Asia, Vol. 22, No. 4, October-December 2017, pp. 1-10.
• Poudyal, Manisha and Sandhya Babel (2017). Investigations on the effectiveness of the Saba banana peel for the treatment of fluoride contaminated water, Desalination and Water Treatment, Vol. 91, October 2017, pp. 374-385.
• Thushari, Pahalagedara Indika; and Sandhya Babel (2017). Waste biomass derived solid acid catalysts for microwave assisted biodiesel production from waste palm oil. In Proceedings of the 7th International Conference on Solid Waste Management (7th IconSWM 2017), 15-17 December 2017, Rajendranagar, Hyderabad, Telangana, India, pp. 995-1004.  
• Luitel, Subodh; and Sandhya Babel (2017). Developing an e-waste estimation model for Kathmandu, Nepal: An End-of-Life approach for Large Household Electronic Appliance. In Proceedings of the 12th GMSARN International Conference on Energy Connectivity, Environment, and Development in GMS (GMSARN 2017), 28-30 November 2017, Danang, Vietnam, 5 p.
• Jiraporn Yongpisanphop; Sandhya Babel; Maleeya Kruatrachue; and Prayad Pokethitiyook (2017). Phytoremediation potential of plants growing on the Pb-contaminated soil at the Song Tho Pb mine, Thailand, Soil and Sediment Contamination: an International Journal, Vol. 26, No. 4, 2017, pp. 426-437.
• Ho, Ngo Anh Dao; Sandhya Babel; and Futoshi Kurisu (2017). Bio-electrochemical reactors using AMI-7001S and CMI-7000S membranes as separators for silver recovery and power generation, Bioresource Technology, Vol. 244, Part 1, November 2017, pp. 1006-1014.
• Ta, Anh Tuan; and Sandhya Babel (2017). Influences of waste to inoculum ratios and temperature on biogas generation of organic solid waste from market. In Proceedings of the 5th International Conference on Environmental Research and Technology (ICERT 2017), 23-25 August 2017, Penang, Malaysia, pp. 156-161.
• Thiranan Leekroh; and Sandhya Babel (2017). Hydroponic screening of five submerged plant species for lead phytoremediation potential. In Proceedings of the 5th International Conference on Environmental Research and Technology (ICERT 2017), 23-25 August 2017, Penang, Malaysia, pp. 118-123.
• Luitel, Subodh; and Sandhya Babel (2017). Estimating and forecasting the amount of mobile phone as waste electrical and electronic equipment (WEEE) generated from Nepalese households. In Proceedings of the 5th International Conference on Environmental Research and Technology (ICERT 2017), 23-25 August 2017, Penang, Malaysia, pp. 487-492.
• Jiraporn Yongpisanphop; and Sandhya Babel (2017). Assessment of Pb accumulation in roots of fast-growing trees inoculated with endophytic bacteria: hydroponic culture. In Proceedigns of the 5th International Conference on Sustainable Solid Waste Management (Athens 2017), 21-24 June 2017, Athens, Greece, 8 p.
• Nguyen, Tu Anh; Sandhya Babel; Siwarutt Boonyarattanakalin; and Thammarat Koottatep (2017). Rapid and decentralized human waste treatment by microwave radiation, Water Environment Research, Vol. 89, No. 7, 1 July 2017, pp. 652-662.
• Jiraporn Yongpisanphop; Sandhya Babel; Maleeya Kruatrachue; and Prayad Pokethitiyook (2017). Hydroponic screening of fast-growing tree species for lead phytoremediation potential, Bulletin of Environmental Contamination and Toxicology, Vol. 99, No. 4, October 2017, pp. 518-523.
• Ho, Ngo Anh Dao; Sandhya Babel; and Korakot Sombatmankhong (2017). Factors influencing silver recovery and power generation in bio-electrochemical reactors, Environmental Science and Pollution Research, Vol. 24, No. 26, September 2017, pp 21024–21037.
• Vilaysouk, Xaysackda; and Sandhya Babel (2017). Benefits of improved municipal solid waste management on greenhouse gas reduction in Luangprabang, Laos. Environmental Technology, Vol. 38, No. 13-14, 2017, pp. 1629-1637.
• Ho, Ngo Anh Dao; and Sandhya Babel (2017). Silver recovery and power generation from ammonia chelated silver solution in a bio-electrical chemical reactor, IOP Conference Series: Materials Science and Engineering: Proceedings of the 2nd International Conference on Civil Engineering and Materials Science (ICCEMS 2017), 26-28 May 2017, Seoul, South Korea, Vol. 216, 2017, Article No. 012004, 6 p.
• Weetara Boontham; and Sandhya Babel (2017). Apiaceae family plants as low-cost adsorbents for removal of lead ion from water environment, IOP Conference Series: Materials Science and Engineering: Proceedings of the 2nd International Conference on Civil Engineering and Materials Science (ICCEMS 2017), 26-28 May 2017, Seoul, South Korea, Vol. 216, 2017, Article No. 012005, 5 p.
• Sudrajat, Hanggara; and Sandhya Babel (2017). A novel visible light active N-doped ZnO for photocatalytic degradation of dyes, Journal of Water Process Engineering, Vol. 16, April 2017, pp. 309-318.
• Babel, Sandhya; Putri A. Sekartaji; Hanggara Sudrajat (2017). TiO₂ as an effective nanocatalyst for photocatalytic degradation of humic acid in water environment. Journal of Water Supply: Research and Technology-AQUA, Vol. 66, No.1, 2017, pp 25-35.
• Alice Sharp; Sandhya Babel; Tshering Gyeltshen; Tsheltrim Pelden; and Dechen Dorji (2016). Establishment of integrated solid waste management system in Mongar town, Bhutan, International Proceedings of  Chemical, Biological and Environmental Engineering: Proceedings of the 2016 International Conference on  Sustainable Waste Management (ICSWM 2016), 26-28 March 2016, Hong Kong, Vol. 92, 2016, pp.98-102.
• Sirintra Arayawate; Ekarat Faedsura; Hanggara Sudrajat (2016). Production of Biodiesel from Waste cooking oil using Transesterification, with the KOH on Carbon support from waste material and Egg Shell, as the catalyst, Environment and Natural Resource Journal, Vol 14, No 2, December 2016, pp. 60-68.
• Babel, Sandhya (2016). Development of Composting in Thailand. In Proceedings of the Asia Pacific Conference on Biotechnology for Waste Conversion 2016 (BioWC2016) [CD-ROM], 6-8 December 2016, Hong Kong, pp. 269. (Extended Abstract)
• Ho, Ngo Anh Dao; Sandhya Babel; and Praphaphorn Pratoomdee (2016). Recovery of Silver from Aqueous Solution by using Bio-Electrochemical System (BES) Technology. In Proceedings of the Asia Pacific Conference on Biotechnology for Waste Conversion 2016 (BioWC2016) [CD-ROM], 6-8 December 2016, Hong Kong, pp. 229-232.
• Thushari, Pahalagedara Indika; and S. Babel (2016). A Novel Environmental Benign Catalyst For Esterification of Palmitic Acid From Palm Empty Fruit Bunch. In Proceedings of the Asia Pacific Conference on Biotechnology for Waste Conversion 2016 (BioWC2016) [CD-ROM], 6-8 December 2016, Hong Kong, pp. 214-217.
• Babel, Sandhya; Sirintra Arayawate; Ekarat Faedsura; and Hanggara Sudrajat (2016). Microwave Assisted Transesterification of Waste Cooking Oil for Biodiesel Production. In Proceedings of 6th International Conference on Solid waste management (IconSWM 2016) [CD-ROM], 24-26 November 2016, Kolkata, India, pp. 1802-1806.
• Loan, Nguyen Thi Phuong; Tran Thi My Dieu; Le Thi Kim Oanh; Alice Sharp; and Sandhya Babel (2016). Possibilities and Challenges to Approach Zero Waste for Municipal Solid Waste Management in Ho Chi Minh City. In Proceedings of 6th International Conference on Solid waste management (IconSWM 2016) [CD-ROM], 24-26 November 2016, Kolkata, India, pp. 479-487.
• Wanida Chooaksorn; Rachnarin Nitisoravut; Chongrak Polprasert; Sandhya Babel; Kritapas Laohhasurayotin; and Wiyong Kangwansupamonkon (2016). Enhancement of Cr(VI) Ion Removal Using Nanochitosan Coated on Bituminous Activated Carbon, Water Environment Research, Vol. 88, No. 11, 1 November 2016, pp 2150-2158.
• Pawena Limpiteeprakan; Sandhya Babel; Jenyuk Lohwacharin; and Satoshi Takizawa (2016). Release of Silver Nanoparticles from Fabrics during the Course of Sequential Washing, Environmental Science and Pollution Research, Vol. 23, No. 22, November 2016, pp. 22810-22818.
• Chayarat Srisunont; and Sandhya Babel (2016). Estimating the Carrying Capacity of Green Mussel Cultivation by Using Net Nutrient Removal Model, Marine Pollution Bulletin, Vo. 112, November 2016, pp. 235-243.
• Babel, Sandhya; Hanggara Sudrajat; and Ajay Aby Abraham (2016). Manganese- and iron-doped zinc oxide for photocatalytic degradation of recalcitrant dyes, Thammasat International Journal of Science and Techology, Vol. 21, No. 4, October-December 2016, pp. 33-43.
• Sekartaji, Putri Ardyarini; and Sandhya Babel (2016). Humic acid degradation by ZnO photocatalyst, MATEC Web of Conferences: Proceedings of the 1st International Conference on Measurement Instrumentation and Electronics (ICMIE 2016), 6-8 June 2016, Munich, Germany, Vol. 75, 1 September 2016, Article No. 02004, 5 p.
• Sudrajat, Hanggara and Sandhya Babel (2016). A new, cost-effective solar photoactive system N-ZnO@polyester fabric for degradation of recalcitrant compound in a continuous flow reactor, Material Research Bulletin, Vol. 83, 2016. pp 369-378.
• Poudyal, Manisha and Sandhya Babel (2016). Evaluating the effectiveness of the banana (Musa spp. ABB cv. Kluai Namwa) peel for the removal of fluoride from water. In Proceedings of Cyprus 2016 4th International Conference on Sustainable Solid Waste Management [CD-ROM], 23-25 June 2016, Limassol, Cyprus, 9 p.
• Sudrajat, Hanggara and Sandhya Babel (2016). Rapid photocatalytic degradation of the recalcitrant dye amaranth by highly active N-WO₃, Environmental Chemistry Letters, Vol. 14, No. 2, June 2016, pp. 243-249.
• Sudrajat, Hanggara and Sandhya Babel (2016). An innovative solar photoactive system N-WO₃@polyester fabric for degradation of amaranth in a thin-film fixed-bed reactor, Solar Energy Materials and Solar Cells, Vol. 149, May 2016, pp. 294-303.
• Sudrajat, Hanggara and Sandhya Babel (2016). Comparison and mechanism of photocatalytic activities of N-ZnO and N-ZrO₂ for the degradation of rhodamine 6G, Environmental Science and Pollution Research, Vol 23, No 10, May 2016, pp. 10177–10188.
• Mitrano, Denise M.; Pawena Limpiteeprakan; Sandhya Babel; and Bernd Nowack (2016). Durability of nano-enhanced textiles through the life cycle: releases from landfilling after washing. Environmental Science: Nano, Vol. 3, No. 2, April 2016, pp. 375-387.
• Pawena Limpiteeprakan and Sandhya Babel (2016). Leaching potential of silver from nanosilver-treated textile products, Environmental Monitoring and Assessment, Vol. 188, No. 3, March 2016, Article No. 156, 12 p.
• Babel, Sandhya and Alice Sharp (2016). Impacts of flood disasters on Industries in Thailand. In Proceedings of International Symposium on Natural and Technological Risk Reduction at Large Industrial Parks (NATECH 2016), 12-13 January 2016, Osaka, Japan. (Extended Abstract)
• Babel, Sandhya and Xaysackda Vilaysouk (2016). Greenhouse gas emissions from municipal solid waste management in Vientiane, Lao PDR, Waste Management & Research, Vol. 34, No. 1, January 2016, pp. 30 –37.
• Nonglak Rungruang and Sandhya Babel (2016). Cadmium removal potential from contaminated soil by Tagetes erecta L. and Panicum maximum: Influence of soil pH. Soil and Sediment Contamination: an International, Vol. 25, No 2, 2016, pp. 133-150.
• Sudrajat, Hanggara; Sandhya Babel; Hiroshi Sakai; and Satoshi Takizawa (2016). Rapid enhanced photocatalytic degradation of dyes using novel N-doped ZrO₂, Journal of Environmental Management, Vol. 165, January 2016, pp. 224-234.
• Sudrajat, Hanggara and Sandhya Babel (2015). Synthesis of N-doped ZrO₂ for photocatalytic degradation of recalcitrant dyes. In Proceedings of the 8th Regional Conference on Chemical Engineering (RCChE 2015), 30 November - 1 Decmber, 2015, Hanoi, Vietnam, 6 p.
• Sudrajat, Hanggara and Sandhya Babel (2015). Kinetic study for photocatalytic degradation of amaranth by novel N-doped ZrO₂. In Proceedings of Peradeniya University International Research Sessions (i-PURSE), 5-6 November, 2015, Peradeniya, Sri Lanka, Vol 19, 2015, 4 p.
• Sekartaji, Putri Ardyarini and Sandhya Babel (2015). Degradation of humic acid by using TiO₂ photocatalyst. In Proceedings of the 10th GMSARN International Conference 2015 on Smart Energy, Environment and Community Development in GMS, 16-18 December 2015, Phnom Penh, Cambodia, 4 p.
• Sandhya Babel and Emmanuel Pacheco Leaño (2015). Effects of thermophilic heat pretreatment of mixed inoculum on biohydrogen production from synthetic and sugarcane mill wastewaters, Thammasat International Journal of Science and Technology, Vol. 20, No. 3, July-September 2015, pp. 55-66.
• Chayarat Srisunont and Sandhya Babel (2015). Uptake, release, and absorption of nutrients into the marine environment by the green mussel (Perna viridis), Marine Pollution Bulletin, Vol. 97, Nos. 1-2, pp. 285–293.
• Poudyal, Manisha and Sandhya Babel (2015). Litchi (Litchi chinensis) peel as an eco-friendly and cost effective adsorbent for the defluoridation of water. In Proceedings of the 3rd EnvironmentAsia International Conference on “Towards International Collaboration for an Environmentally Sustainable World” [CD-ROM], 17-19 June 2015, Bangkok, Thailand, pp. 28-35.
• Vilaysouk, Xaysackda and Sandhya Babel (2015). Co-benefits of improved solid waste management in Luangprabang, Lao PDR. In Proceedings of the 3rd International Conference of Solid Wastes: Knowledge Transfer for Sustainable Resource Management (ICSWHK 2015) [CD-ROM], 19-23 May 2015, Hong Kong SAR, P. R. China, pp. 103-106.
• Poudyal, Manisha and Sandhya Babel (2015). Removal of fluoride using granular activated carbon and domestic sewage sludge, International Proceedings of Chemical, Biological and Environmental Engineering: Proceedings of the 2015 4th International Conference on Informatics, Environment, Energy and Applications (IEEA 2015), 28-29 March 2015, Chonburi, Thailand, Vol. 82, pp. 139-143.
• Sudrajata, Hanggara and Sandhya Babel (2015). Photocatalytic degradation of methylene blue using visible light active N-doped ZnO, Advanced Materials Research: Proceedings of the 2014 3rd International Conference on Material Science and Engineering Technology (ICMSET 2014), 24-26 October 2014, Beijing, China, Vol. 1101, pp. 299-302.
• Nguyen, Tu Anh; Sandhya Babel; and Siwarutt Boonyarattanakalin (2014). Application of microwave technology for treatment of human feces. In Proceedings of 1st Specialist Conference on Municipal Water Management and Sanitation in Developing Countries, 2-4 December 2014, Bangkok, Thailand, pp. 38-44.
• Phearkeo, Oley and Sandhya Babel (2014). A study on effectiveness of floating plants on cadmium removal from wastewater. In Proceedings of the Fifth International Conference on Science and Engineering (ICSE 2014) [CD-ROM], 29-30 December 2014, Yangon, Myanmar, 5 p.
• Nguyen, Tu Anh; Sandhya Babel; and Siwarutt Boonyarattanakalin (2014). Effect of cleansing water and the amount of allowed air on efficiency of microwave radiation for decentralized wastewater treatment. In Proceedings of the 9thGMSARN International Conference 2014 on Connectivity and Sustainability in GMS: Energy, Environmental and Social Issues [CD-ROM], 12-14 November 2014, Ho Chi Minh City, Vietnam, 6 p.
• Phearkeo, Oley and Sandhya Babel (2014). A study on screening of floating plants for removal of lead from wastewater. In Proceedings of the 9th GMSARN International Conference 2014 on Connectivity and Sustainability in GMS: Energy, Environmental and Social Issues [CD-ROM], 12-14 November 2014, Ho Chi Minh City, Vietnam, 6 p.
• Chayarat Tantanasarit and Sandhya Babel (2014). Simulation of “net” nutrients removal by green mussel (Perna viridis) in estuarine and coastal areas, World Academy of Science, Engineering and Technology: Proceedings of the ICEBESE 2014: International Conference on Environmental, Biological and Ecological Sciences and Engineering [CD-ROM], 14-15 January 2014, Zurich, Switzerland, Vol. 85, 2014, pp. 19-22.
• P. Limpiteeprakan and S. Babel (2014). Quantification of nanosilver from different commercial products available in Thailand and their protential for leaching with deionized water. In Proceedings of the 4th International Conference on Solid Waste Management (IconSWM 2014) [CD-ROM], 28-30 January 2014, Hyderabad, India, pp 643-649.
• VilaySouk, Xaysackda and Sandhya Babel (2013). Estimation of greenhouse gas emission from landfill in Luangprabang, Lao PDR. In Proceedings of the 8th GMSARN International Conference 2013 on Green Growth in GMS: Energy, Environment and Social Issues [CD-ROM], 18-20 December 2013, Mandalay, Myanmar, 4 p.
• Babel, Sandhya and Pawena Limpiteeprakan (2013). Leaching potential of nanosilver from commercial products. InProceedings of the 8th GMSARN International Conference 2013 on Green Growth in GMS: Energy, Environment and Social Issues [CD-ROM], 18-20 December 2013, Mandalay, Myanmar, 5 p.
• Xaysackda Vilaysouk and Sandhya Babel (2013). Comparison of Potential Greenhouse Gas Emission from Municipal Solid Waste Disposal Site in Savannakhet and Champasak, Lao PDR. In Proceedings of the 6th ASEAN Civil Engineering Conference (ACEC) and the 6th ASEAN Environmental Engineering Conference (AEEC), 21-22 November 2013, Bangkok, Thailand, Paper No. E30, pp. 290-300.
• Chayarat Tantanasarit; Andrew J. Englande; and Sandhya Babel (2013). Nitrogen, phosphorus and silicon uptake kinetics by marine diatom Chaetoceros calcitrans under high nutrient concentrations, Journal of Experimental Marine Biology and Ecology, Vol. 446, August 2013, pp. 67-75.
• E.P. Leaño; S. Babel; A. Sharp; and W. Prathumpai (2013). Effects of thermophilic heat pretreatment of mixed inoculum on biohydrogen production from synthetic and sugarcane mill wastewaters. In Proceedings of International Conference on Solid Waste 2013 Innovation in Technology and Management [CD-ROM], 5-9 May 2013, Hong Kong SAR, China, pp.773-777.
• Dacera, Dominica D. and Sandhya Babel (2013). Effect of drying process on heavy metals fractionation of contaminated sludge for land application, Soil and Sediment Contamination, Vol. 22, No. 4, 2013, pp.457-468.
• Chayarat Tantanasarit; Sandhya Babel; Andrew J. Englande; and Shettapong Meksumpun (2013). Influence of size and density on filtration rate modeling and nutrient uptake by green mussel (Perna viridis), Marine Pollution Bulletin, Vol. 68, No. 1-2, 2013, pp. 38-45.
• Jenjira Saetang and Sandhya Babel (2012). Biodegradation of organics in landfill leachate by immobilized white rot fungi, Trametes versicolor BCC 8725, Environmental Technology, Vol. 33, No. 22, November 2012, pp. 2575-2584. (Selected papers from the International Conference on Solid Waste-Moving Towards Sustainable Resource Management, 2-6 May 2011, Hong Kong SAR)
• Suzuki, Tatsuhiko; Yoshikane Takahashi; Rachnarin Nitisoravut; Sandhya Babel; and Chongrak Polprasert (2012). The study of applying the hybrid MF membrane system for the treatment of high-color surface water in Thailand. InProceedings of the 9th International Symposium on Water Supply Technology in Yokohama 2012, 20-22 November 2012, Yokohama, Japan, 8 p.
• Leaño, Emmanuel Pacheco; Alfredo J. Anceno; and Sandhya Babel (2012). Ultrasonic pretreatment of palm oil mill effluent: impact on biohydrogen production, bioelectricity generation, and underlying microbial communities,International Journal of Hydrogen Energy, Vol. 37, No. 17, September 2012, pp. 12241-12249.
• Chayarat Tantanasarit and Sandhya Babel (2012). Investigation on filtration rate and subsequent nutrient removal by green mussel Perna viridis. In Proceedings of the Conference on Environmental Pollution and Public Health (CEPPH 2012) [CD-ROM], 9-11 August 2012, Shanghai, China, pp. 476-479.
• Leaño, Emmanuel P. and Sandhya Babel. (2012). The influence of enzyme and surfactant on biohydrogen production and electricity generation using Palm Oil Mill Effluent. Journal of Cleaner Production, Vol 31, August 2012, pp. 91-99.
• E.P. Leaño, Sandhya Babel (2012). Effects of pretreatment methods on cassava wastewater for biohydrogen production optimization, Renewable Energy Vol. 39, No. 1, March 2012, pp. 339-346.
• Nonglak Rungruang and Sandhya Babel (2011). Cadmium removal potential from contaminated soil by Tagetes Erecta L.: Effect of zinc and pH. In Proceedings of the 2nd International Conference on Sustainable Waste Management, 8-11 November 2011, Kolkata, India, pp.730-735.
• Nonglak Rungruang; Sandhya Babel and Preeda Parkpianb (2011). Screening of potential hyperaccumulator for cadmium from contaminated soil, Desalination and Water Treatment, Vol. 32, Nos. 1-3, August 2011, pp. 19-26.
• E.P. Leaño and Sandhya Babel (2011). Electricity generation from anaerobic sludge and cassava wastewater subjected to pretreatment methods using microbial fuel cell. In Proceedings of the 1st Clean Energy and Technology (CET 2011)� [CD ROM], 27 - 29 June 2011, Kuala Lumpur Malaysia, pp. 1-5
• Sandhya Babel and Satoshi Takizawa (2011). Chemical pretreatment for reduction of membrane fouling caused by algae. Desalination, Vol. 274, No. 1-3, pp. 171-176.
• Jenjira Saetang and Sandhya Babel (2011). Biodegradation of organics in landfill leachate by immobilized white rot fungi, Trametes versicolor BCC 8725. In Proceedings of the International Conference on Solid Waste 2011 Moving Towards Sustainable Resource Management[CD-ROM], 2-6 May 2011, Hong Kong SAR, China. pp. 700-704.
• Leaño, E.P. and Sandhya Babel (2011). Effect of thermophilic heat pretreatment of mixed inoculum on biohydrogen production from artificial wastewater and sugarcane mill wastewater. A paper presented in International conference “Microbes in Wastewater and Water treatment, Bioremediation and Energy Production” 24-26 January 2011, BITS Pilani, Goa, India.
• Jenjira Saetang and Sandhya Babel (2010). Effect of glucose on enzyme activity and color removal by Trametes versicolor for high strength landfill leachate, Water Science & Technology, Vol. 62, No. 11, pp. 2519-2526.
• Nonglak Rungruang; Sandhya Babel; and Preeda Parkpian (2010). Screening of potential hyperaccumulator for cadmium from contaminated soil. A paper presented in Challenges in Environmental Science and Engineering (CESE) 2010, 26 September - 1 October 2010, Cairns, Australia.
• Jenjira Saetang and Sandhya Babel (2010). Fungi immobilization for landfill leachate treatment, Water Science & Technology, Vol. 62, No. 6, 2010, pp. 1240-1247.
• Abeysundara, U.G. Yasantha and Sandhya Babel (2010). A quest for sustainable materials for building elements in Sri Lanka: foundations, Environmental Progress and Sustainable Energy, Vol. 29, No. 3, October 2010, pp. 370-381.
• Babel, Sandhya and Satoshi Takizawa (2010). Microfiltration membrane fouling and cake behavior during algal filtration, Desalination, Vol. 261, Nos. 1-2, October 2010, pp. 46-51.
• Babel, Sandhya and Einstine M. Opiso (2010). Utilisation of andisols as possible low-cost adsorbent to remove Cr (VI) from aqueous solution, International Journal of Environmental Technology and Management, Vol. 12, Nos. 2-4, February 2010, pp. 277-293.
• Xayyavong, Syvang and Sandhya Babel (2010). Quality of bottled drinking water: case study in Vientiane, Laos and Thailand. A paper presented in International Conference on Environmental Pollution and Public Health (EPPH2010), 21-23 June 2010, Chengdu, China.
• Dacera, Dominica Del Mundo; Sandhya Babel; and Preeda Parkpian (2009). Potential for land application of contaminated sewage sludge treated with fermented liquid from pineapple wastes, Journal of Hazardous Materials, Vol. 167, Nos. 1-3, August 2009, pp. 866-872.
• Jenjira Saetang and Sandhya Babel (2009). Effect of leachate loading rate and incubation period on the treatment efficiency by T. versicolor immobilized on foam cubes, International Journal of Environmental Science and Technology, Vol. 6, No. 3, pp. 457-466.
• Abeysundara, U.G. Yasantha and Sandhya Babel (2009). Selecting sustainable materials for ceilings in Sri Lanka,Proceedings of ICE, Construction Materials, Vol. 162, No. 2, pp. 49-58.
• Abeysundara, U.G. Yasantha; Sandhya Babel; and Shabbir Gheewala (2009). A matrix in life cycle perspective for selecting sustainable materials for buildings in Sri Lanka, Building and Environment, Vol. 44, No. 5, May 2009, pp. 997-1004.
• Babel, Sandhya; J. Sae-Tang; Athapol Pecharaply (2009). Anaerobic co-digestion of sewage and brewery sludge for biogas production and land application, International Journal of Environmental Science and Technology, Vol. 6, No. 1, Winter 2009, pp. 131-140.
• Abeysundara, U.G. Yasantha; Sandhya Babel; and Mongkut Piantanakulchai (2009). A matrix for selecting sustainable floor coverings for buildings in Sri Lanka, Journal of Cleaner Production, Vol. 17, No. 2, January 2009, pp. 231-238.
• Jenjira Saetang and Sandhya Babel (2009). Effect of glucose on enzyme activity and color removal by T. versicolorfor high strength landfill leachate. In Proceedings of International Conference “3rd Specialized Conference on Decentralized Water and Wastewater International Network (IWA Conference)” [CD-ROM], 10-13 November 2009, Kathmandu, Nepal.
• Babel, Sandhya; Massalin Suksai and Phattaraporn Sarikkha (2009). Lignin recovery from pulp and paper mill wastewater. In Proceedings of International Conference on Biotechnology “Biotechnology for Better Life” [CD ROM], 15-16 June 2009, Bandung, Indonesia. pp. 103-109.
• Babel, Sandhya; Pakaporn Kantapasara; and Suthicha Jittanon (2009). Comparison of environment impacts of gaseous emissions from power plants in Thailand. In Proceedings of International Conference: An International Perspective on Environmental and Water Resources (EWRI-ASCE) [CD-ROM], 5-7 January 2009, Bangkok, Thailand. 8 p.
• Dacera, Dominica Del Mundo and Sandhya Babel (2008). Removal of heavy metals from contaminated sewage sludge using Aspergillus niger fermented raw liquid from pineapple wastes, Bioresource Technology, Vol. 99, No. 6, April 2008, pp. 1682-1689.
• Babel, Sandhya; Alice Sharp; Amornpong Thongbhakdi; and Zebunessa Shoma (2008). Community participation in pollution abatement and water quality conservation through bio monitoring. In Proceedings of the 3rd WEPA International Forum on Water Environmental Governance in Asia, 23-24 October 2008, Putrajaya, Malaysia. pp. 132-137.
• Babel, Sandhya and Satoshi Takizawa (2008). Membrane fouling and cake behavior during algal filtration. InProceedings of the 6th Regional Sympoisum on Membrane Science & Technology, 13-15 August 2008, Phuket, Thailand. 8 p.
• Dacera, Dominica del Mundo and Sandhya Babel (2008). Evaluation of heavy metal from removal by unfermented and naturally fermented pineapple wastes from Bangkok sewage sludge. In Proceedings of the Second International Symposium on Food and Water Sustainability in Asia 2008, 7-8 October 2008, Macau, China. pp. 121-128.
• Nonglak Rungruang and Sandhya Babel (2008). Treatment of natural rubber processing wastewater by combination of ozonation and activated sludge process. In Proceedings of International Conference on Environmental Research and Technology (ICERT 2008), 28-30 May 2008, Parkroyal Penang, Malaysia. pp. 259-263.
• Abeysundra, U. G. Yasantha; Sandhya Babel; and Shabbir Gheewala (2007). A decision making matrix with life cycle perspective of materials for roofs in Sri Lanka, Journal of Materials and Design, Vol. 28, pp. 2478-2487.
• Abeysundra, U. G. Yasantha; Sandhya Babel; Shabbir Gheewala; and Alice Sharp (2007). Environmental, economic and social analysis of materials for doors and windows in Sri Lanka, Building and Environment, Vol. 42, No. 5, May 2007, pp. 2141-2149.
• Babel, Sandhya and Einstine M. Opiso (2007). Removal of Cr from synthetic wastewater by sorption into volcanic ash soil, International Journal of Environmental Science and Technology, Vol. 4, No. 1, pp. 99-107.
• Dacera, Dominica Del Mundo and Sandhya Babel (2007). Heavy metals removal from contaminated sewage sludge by naturally fermented raw liquid from pine apple wastes, Water Science and Technology, Vol. 56, No 7, pp. 145-152.
• Babel, Sandhya; Suwanchai Nitisoravut; Alice Sharp; and Dominica Del Mundo Dacera (2007). Low cost community based treatment unit for floating food vendors and slum community in Thailand. In Proceedings of the 2nd International Forum on Water Environmental Governance in Asia, 3-4 December 2007, Beppu, Oita, Japan. pp. 92-97.
• Dacera, Dominica Del Mundo and Sandhya Babel (2007). Assessment of heavy metal removal efficiencies by naturally fermented and A. Niger fermented pineapple wastes from contaminated sewage sludge. In Proceedings of the ECO-TECH 2007 International Conference, 26-28 November 2007, Kalmar, Sweden. pp. 417-426.
• Dacera, Dominica Del Mundo and Sandhya Babel (2007). Naturally fermented raw liquid from pineapple wastes as extractant for heavy metal removal from contaminated sewage sludge. In Proceedings of the International Conference on Water Management and Technology Applications in Developing Countries [CD-ROM], 14-16 May 2007, Kuala Lumpur, Malaysia. 8 p.
• Jenjira Saetang and Sandhya Babel (2007). Landfill leachate treatment using white rot fungi. In Proceedings of the 2nd IWA – ASPIRE Conference and Exhibition [CD-ROM], 29-31 October 2007, Perth, Australia, Paper No. 059, 8 p.
• Jenjira Saetang and Sandhya Babel (2007). Solid waste landfill leachate treatment from garbage truck using immobilized white rot fungi. In Proceedings of the 2007 International Symposium on Environmental Science and Technology, 13-16 November, Beijing, China. pp. 1265-1271.
• Babel, Sandhya and Dominica del Mundo Dacera (2006). Heavy metal removal from contaminated sludge for land application: a review, Waste Management, Vol. 26, No. 9, 2006, pp. 988-1004.
• Dacera, Dominica del Mundo and Sandhya Babel (2006). Use of citric acid for heavy metals extraction from contaminated sewage sludge for land application, Water Science and Technology, Vol. 54, No. 9, pp. 129-135.
• Kurniawan, Tonni Agustiono; Gilbert Y. S. Chan; Wai-Hung Lo; and Sandhya Babel (2006). Comparisons of low-cost adsorbents for treating wastewaters laden with heavy metals, Science of the Total Environment, Vol. 366, No. 2-3, August 2006, pp. 409-426.
• Kurniawan, Tonni Agustiono; Gilbert Y. S. Chan; Wai-Hung Lo; and Sandhya Babel (2006). Physico–chemical treatment techniques for wastewater laden with heavy metals, Chemical Engineering Journal, Vol. 118, No. 1-2, May 2006, pp. 83-98.
• Dacera, Dominica del Mundo and Sandhya Babel (2006). Removal of heavy metals from sludge using pineapple wastes, Journal of Research in Engineering and Technology, Vol. 3, No. 3, pp. 265-277.
• Abeysundra, U. G. Yasantha; Sandhya Babel; and Alice Sharp (2006). A life cycle perspective on building floor coversings in Sri Lanka. In Proceedings of 5th Australian Conference on Life Cycle Assessment [CD-ROM], 22-24 November 2006, Melbourne, Australia. 10 p.
• Abeysundara U.G., Yasantha; Sandhya Babel; and Shabbir Gheewala (2006). A matrix with life cycle perspective of materials for roof ceilings in Sri Lanka. In Proceedings of the Seventh International Conference on EcoBalance, 14-16 November 2006, Tsukuba, Japan. 4 p.
• Abeysundara U.G., Yasantha; Sandhya Babel; and Shabbir Gheewala (2006). Integration of environmental economic and social assessments for selecting sustainable materials for buildings in Sri Lanka: a life cycle perspective. InProceedings of the International Conference on Green and Sustainable Innovation (ICGSI2006) [CD-ROM], 29 November – 1 December 2006, Chiang Mai, Thailand. pp. 375-381.
• Dacera, Dominica del Mundo and Sandhya Babel (2006). Use of citric acid for heavy metals extraction from contaminated sewage sludge for land application. In Proceedings of the IWA World Water Congress and Exhibition, 10-14 September 2006, Beijing, China. 8 p.
• Opiso, Einstine M. and Sandhya Babel (2006). Potential of andisol around Mt. Isarog in the Philippines for the removal of Cr (VI) from aqueous systems. In Proceedings of 4th International Workshop on Earth Science and Technology, December 2006, Fukuoka, Japan. pp. 399-406.
• Opiso, Einstine M.; Sandhya Babel; and Pakorn Opapraksit (2006). Removal of Cr(VI) from synthetic wastewater by volcanic ash soil. In Proceedings of the International Conference on Green and Sustainable Innovation (ICGSI2006), 29 November - 1 December 2006, Chiang Mai, Thailand. pp. 338-344.
• Babel, Sandhya and Tonni Agustiono Kurniawan (2006). Various treatment technologies to remove arsenic and mercury from contaminated ground water: An overview. South East Asian Water Environment 1 published by IWA. Edited by Schinichiro Ohgaki, pp. 214- 222.
• Kurniawan, Tonni Agustiono andSandhya Babel (2006). Cr(VI) removal from electroplating wastewater using coconut shell charcoal and coconut shell-based activated carbon modified with oxidizing agents and/or chitosan. Focus on Environmental Research Emma B. Davis (edi), Nova Science Publishers Inc., pp. 211-234.
• Abeysundra U. G., Yasantha and Sandhya Babel (2005). Comparison of waste management practices in Thailand and Sri Lanka and management steps to improve present waste management practices in Colombo, Sri Lanka. A paper presented at the International Conference on Integrated Solid waste Management in South East Asia, 5-7 July 2005, Siem Reap, Cambodia.
• Abeysundra U. G., Yasantha; Sandhya Babel; and Shabbir Gheewala (2005). Analysis of environmental, economic and social factors of construction materials for doors and windows: a case study from Sri Lanka. In Proceedings of the International Conference on Innovation by Life Cycle Management (LCM2005) , 5-7 September 2005, Barcelona, Spain. Vol. 1, pp. 276-280.
• Babel, Sandhya and Dominica del Mundo Dacera (2005). Chemical extraction of heavy metals from contaminated sludge for land application. In Proceedings of the International Congress of Chemistry and Environment (ICCE 2005) , 24-26 December 2005, Indore, India. pp. 137-141.
• Babel, Sandhya and Umarat Suntisukaseam (2005). A research study on hexavalent chromium removal from synthetic wastewater using unmodified and chemically modified corn cob. In Proceedings of the 1st IWA – ASPIRE International Conference [CD-ROM], 10-15 July 2005, Singapore. 6 p.
• Babel, Sandhya; Preeda Parkpian; and Jenjira Sae-Tang (2005). Alternative energy generation from waste sludge by anaerobic co-digestion. A paper presented at the International Conference on Integrated Solid waste Management in South East Asia, 5-7 July 2005, Siem Reap, Cambodia.
• Kurniawan, Tonni A.; Gilbert Y. S. Chan; Wai-Hung Lo; Mukand S. Babel; and Sandhya Babel (2005). Problems and challenges of water resources management in Southeast Asia: the China’s Water Agenda 21 as a source of inspiration. In Proceedings of the 1st IWA – ASPIRE International Conference [CD-ROM], 10-15 July 2005, Singapore. 6 p.
• Sandhya Babel and Satoshi Takizawa (2004). A study on algal fouling of microfiltration membranes with and without chemical pretreatment. In Proceedings of IWA Specialty Conference Water Environment – Membrane Technology (WEMT 2004) , June 7-10, 2004, Seoul, Korea, pp. 1443-1450.
• Babel, S. and Kurniawan, T.A. (2004). Cr(VI) removal from synthetic wastewater using coconut shell charcoal and commercial activated carbon modified with oxidizing agents and/or chitosan. Chemosphere, Vol. 54, No. 7, pp. 951-967.
• Sandhya Babel, Kensuke Fukushi, Bunpot Sitanrassamee (2004). Effect of acid speciation on solid waste liquefaction in an anaerobic acid digester. Water Research38, pp. 2416-2422.
• Sandhya Babel and Tonni Agustiono Kurniawan (2004). Chromium (VI) removal from electroplating wastewater using chemically treated Zeolite. In Proceedings (CD-ROM) 9th World Filtration Congress, April 18-24, 2004 held at New Orleans, Louisiana, USA.
• Shabbir Hussaini Gheewala, Mukand Singh Babel, Ashim Das Gupta and Sandhya Babel (2003). Rapid assessment techniques for chemicals in raw water sources. Journal of Water Supply Research and Technology- AQUA, 52.7, pp. 521-528.
• Babel, S. and Kurniawan, T.A. (2003). A research study on Cr(VI)removal from contaminated wastewater using natural zeolite. Journal of Ion Exchange, 14, pp.289-292.
• K. Fukushi, S. Babel, S. Burakrai (2003). Survival of Salmonella spp. in an anaerobic acid digester treating sewage sludge. Bioresource Technology 86, pp. 53-57.
• Sandhya Babel and Tonni Agustiono Kurniawan (2003). Low-cost adsorbents for heavy metal uptake from contaminated water: a review. Journal of Hazardous Materials B97, pp. 219-243.
• Dominica Dacera, Peesamai Jenvanitpanjakul, Suwanchai Nitisoravut, and Sandhya Babel (2003). Hexane reduction in a Thai rice bran oil factory: A cleaner technology approach. Thammasat International Journal of Science and Technology 8, No 4, pp. 6-17.
• Babel, S. and Kurniawan, T.A. (2003). Various treatment technologies to remove arsenic and mercury from contaminated groundwater: An overview. In Proceedings of the 1st International Symposium on Southeast Asian Water Environment, 24-25 October 2003, Bangkok, Thailand, pp. 433-440.
• Babel, S. and Kurniawan, T.A. (2003). Chromium removal from electroplating wastewater using chemically modified coconut shell charcoal and coconut shell-based activated carbon. In Proceedings (CD-ROM) of the IWA Asia-Pacific Regional Conference Asian Waterqual 2003, 19-23 October 2003, Bangkok, Thailand.
• Kurniawan, T.A. and Babel, S. (2003). Chromium removal from electroplating wastewater using low-cost adsorbents and commercial activated carbon. In Proceedings of the 5th International Summer Symposium, 26 July 2003, Tokyo, Japan, pp. 345-348.
• Tonni Agustiono Kurniawan and Sandhya Babel (2003). A Research study on Cr(VI) from electroplating wastewater using chemically modified coconut shell-based activated carbon and treated Zeolite. A paper presented in 9th Annual Industrial Wastes Technical and Regulatory Conference, 13-16 April 2003, San Antonio, Texas USA, pp 1-15.
• T. Kurniawan and S. Babel (2003). A research study on Cr (VI) removal from contaminated wastewater using low-cost adsorbents and commercial activated carbon. In Proceedings of the 2nd Regional Conference on Energy Technology towards Cleaner Environment, 12-14 February 2003, Phuket, Thailand, pp. 1110-1117.
• K. Fukushi, S. Babel and H. Xuan (2002). Examination of copper removing bacteria from activated sludge culture.Water Science Technology 46, No 11-12, 189-194.
• Sandhya Babel, Satoshi Takizawa, Hiroaki Ozaki, H. (2002). Factors affecting seasonal variation of membrane filtration resistance caused by Chlorella Algae. Water Research 36, 1193-1202.
• K. Fukushi, S. Babel and H. Xuan (2001). Isolation and examination of copper removing bacteria from activated sludge culture. A paper presented in Asian Water Qual 2001 Conference held in Fukuoka, Japan from September 12-15, 2001.
• Babel, S. and Takizawa, S. (2000). A study on membrane fouling due to algal deposition. Water Science and Technology 41, No.10-11, 327-335.
• Takizawa, S., Babel, S., Pradhan, N., Prathomrungsiyunkul, T., Suwannarit, K. and Yamazaki, S. (2000). Cross-flow ultra-filtration for surface water treatment in North Thailand. Water Science and Technology 41, No 10-11, 69-76.
• Babel, S., Muttamara, S., Visvanathan, C., Boonthanon, S. and Mora, J. C. (1995). Preliminary investigations on ozone color removal from a solid waste landfill leachate. A paper presented at the 12th World Congress of the International Ozone Association held at Lille Grand Palais, Lille, France.
• Visvanathan, C., Muttamara, S., Babel, S. and Ben Aim, R. (1994). Treatment of landfill leachate by crossflow microfiltration and ozonation. Separation Science and Technology , 29(3), 315-332.
• Bhargava, S., Sharma, K., and Babel, S. (1987). Consumer acceptability of parched soybean and their biochemical and nutritional assessment. A paper presented at 7th National Convention of Food scientists and Technologists held at CFTRI, Mysore, India from February 27 to March 1, 1987.
• Ranka, P. C., Babel, S., and Dave, M. (1986). A Food supplement for marasmic children. The Rajasthan Medical Journal. Vol. 25(3), 16-19.