Arsenic Mobility and Groundwater Extraction in Bangladesh
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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.
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The record
- Venue
- Science
- Topic
- Arsenic contamination and mitigation
- Field
- Environmental Science
- Canadian institutions
- University of British Columbia
- Funders
- National Institute of Environmental Health SciencesNational Aeronautics and Space Administration
- Keywords
- ArsenicAquiferGroundwaterEnvironmental chemistryBiogeochemical cycleDissolved organic carbonEnvironmental scienceNitrateSorptionTotal organic carbonChemistryGeologyAdsorption
- Has abstract in OpenAlex
- yes