Influence of geochemical, morphological, and hydrological factors on groundwater arsenic distribution in a complex terrain
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Contamination of groundwater by Arsenic (As), a known carcinogen, is a major drinking water concern affecting millions globally including South and South East Asia. Often associated with iron (III) hydroxides within soils and sediments, arsenic gets released into groundwater through multiple hydrogeochemical processes. Nearly three decades of research has led to our understanding that reductive dissolution of Fe (III) oxyhydroxides is the primary mechanism of arsenic release into aquifers. Yet, mechanisms of release and accumulation both still remain elusive in terms of effects of local geological and hydrological conditions. The interest to unravel the unknowns has escalated particularly with recent revelation of more new areas discovered to host groundwater arsenic contaminated aquifers.
Supervisor: Chandan Mahanta