Electro-chemical arsenic remediation: field trials in West Bengal

The Science of the Total Environment
Susan E AmroseAshok J Gadgil

Abstract

Millions of people in rural South Asia are exposed to high levels of arsenic through groundwater used for drinking. Many deployed arsenic remediation technologies quickly fail because they are not maintained, repaired, accepted, or affordable. It is therefore imperative that arsenic remediation technologies be evaluated for their ability to perform within a sustainable and scalable business model that addresses these challenges. We present field trial results of a 600 L Electro-Chemical Arsenic Remediation (ECAR) reactor operating over 3.5 months in West Bengal. These results are evaluated through the lens of a community scale micro-utility business model as a potential sustainable and scalable safe water solution for rural communities in South Asia. We demonstrate ECAR's ability to consistently reduce arsenic concentrations of ~266 μg/L to <5 μg/L in real groundwater, simultaneously meeting the international standards for iron and aluminum in drinking water. ECAR operating costs (amortized capital plus consumables) are estimated as $0.83-$1.04/m(3) under realistic conditions. We discuss the implications of these results against the constraints of a sustainable and scalable business model to argue that ECAR is a promising techn...Continue Reading

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Dec 3, 2011·Environmental Science & Technology·Case M van GenuchtenAshok J Gadgil
Sep 18, 2012·Environmental Science & Technology·Lei LiAshok J Gadgil

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Citations

Aug 8, 2015·Journal of Hazardous Materials·Tara M ClancyKim F Hayes
Oct 8, 2016·Environmental Science & Technology·Tara M WebsterLutgarde Raskin
Dec 21, 2016·Environmental Science & Technology·Shiwei XieYanxin Wang
Jun 1, 2018·Environmental Science. Processes & Impacts·Case M van GenuchtenJasquelin Peña
Mar 23, 2018·Environmental Science & Technology·Katya CherukumilliAshok J Gadgil
Dec 15, 2017·Environmental Science & Technology·James M BarazeshDavid L Sedlak
Apr 22, 2020·Environmental Science & Technology·Siva R S BandaruAshok Gadgil
Jul 7, 2020·Environmental Science & Technology·Feng MaoDavid M Hannah

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