Video: Winner of 2011 Environmental Challenge Installs Arsenic Groundwater Removal System in Cambodia

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In 2011, the Tangore-SenGupta Foundation won first prize of $50,000 in the Reed Elsevier Environmental Challenge.

The project, Sustainable Treatment of Contaminated Groundwater in Cambodia: Turning a Crisis into an Economic Enterprise, focuses on arsenic removal in ground-sourced drinking water in Cambodia. Many people living in the Mekong river floodplains in Vietnam, Cambodia and Laos use water contaminated with arsenic at concentrations typically over 20 times the safe limit prescribed by the World Health Organization. The project involves an arsenic groundwater removal system using locally available chemical compounds and reusable sand filters. Ground water is pumped into an overhead tank, chemically stabilised, filtered using reusable arsenic-selective adsorbents, and converted into stable sludge/solids for safe long-term storage. Twelve community-level arsenic removal units are to be installed in remote villages and schools in Cambodia.

The project, using locally available

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