Arsenic Mobility and Groundwater Extraction in Bangladesh
Top Cited Papers
- 22 November 2002
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 298 (5598) , 1602-1606
- https://doi.org/10.1126/science.1076978
Abstract
High levels of arsenic in well water are causing widespread poisoning in Bangladesh. In a typical aquifer in southern Bangladesh, chemical data imply that arsenic mobilization is associated with recent inflow of carbon. High concentrations of radiocarbon-young methane indicate that young carbon has driven recent biogeochemical processes, and irrigation pumping is sufficient to have drawn water to the depth where dissolved arsenic is at a maximum. The results of field injection of molasses, nitrate, and low-arsenic water show that organic carbon or its degradation products may quickly mobilize arsenic, oxidants may lower arsenic concentrations, and sorption of arsenic is limited by saturation of aquifer materials.Keywords
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