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Mitigation and Remedy of Groundwater Arsenic Menace in India

Mitigation and Remedy of Groundwater Arsenic Menace in India

Mitigation and Remedy of Groundwater Arsenic Menace in India

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<strong>Mitigation</strong> <strong>and</strong> <strong>Remedy</strong> <strong>of</strong> <strong>Groundwater</strong> <strong>Arsenic</strong> <strong>Menace</strong> <strong>in</strong> <strong>India</strong> : A Vision Documentmechanism <strong>of</strong> arsenic groundwater contam<strong>in</strong>ation. The mechanism states that the As derivesfrom reductive dissolution <strong>of</strong> Fe oxyhydroxide (FeOOH) <strong>and</strong> release <strong>of</strong> its sorbed As. The Feoxyhydroxide exists <strong>in</strong> the aquifer <strong>in</strong> dispersed phases, such as coat<strong>in</strong>gs on sedimentary gra<strong>in</strong>s.Reduction <strong>of</strong> the Fe is driven by microbial metabolism <strong>of</strong> sedimentary organic matter present <strong>in</strong>the system as C. Identification <strong>of</strong> the mechanism <strong>of</strong> As release to groundwater would help toprovide a frame work to guide the placement <strong>of</strong> new water wells hav<strong>in</strong>g acceptableconcentrations <strong>of</strong> As.NIH & CGWB 55

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