Abstract
We investigated possible hypothesis related to arsenic (As) enrichment in the aquifer system of Northeast India, and concluded three governing deductions with explicit evidences, namely: i) the tropical environment facilitated leaching driven As release from the rocks; duly supported by reductive dissolution of clay deposition attributed to the seasonal floods in the region. ii) As-containing quaternary sediments succoured by prevailing plate tectonics in active convergent tectonic settings of the Eastern Himalayas and; iii) high precipitation, tropical climate, and biodiversity richness driven microbial mediated weathering of mineral-rich rock formations, contributing to As enrichment. We emphasized the uniqueness of the aquifer systems of Northeastern India for understanding the dynamics of prevalence and co-contaminations of geogenic contaminations like As-F-U, especially in the context of karst aquifer, and surface-groundwater interactions, implying the presence of immense opportunities of getting several insights on the fate and transport of geogenic contamination enabling the global management.
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