Arsenic contamination in Rapti River Basin, Terai region of India
| Autor: | Sonal Bindal, Anand Kumar, Chander Kumar Singh |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Hydrology
High concentration geography geography.geographical_feature_category 010504 meteorology & atmospheric sciences Drainage basin chemistry.chemical_element Aquifer 010501 environmental sciences Contamination 01 natural sciences Arsenic contamination of groundwater River dynamics chemistry Geochemistry and Petrology Environmental science Economic Geology Groundwater Arsenic 0105 earth and related environmental sciences |
| Zdroj: | Journal of Geochemical Exploration. 192:120-131 |
| ISSN: | 0375-6742 |
| DOI: | 10.1016/j.gexplo.2018.06.010 |
| Popis: | Ingestion of Arsenic (As) through groundwater has become a severe public health concern around the world. In >70 countries groundwater with elevated concentrations of As has been reported. The present study estimates the As concentration as high as 399 μg/L in Rapti River Basin which lies in Terai region of Uttar Pradesh, India. The villages on the left bank showed As contamination whereas villages on the right bank does not show As concentration above WHO standards of 10 μg/L. High concentration of iron (Fe) along with bicarbonate (HCO3−) and As indicates reductive dissolution of FeOOH leading enrichment of As in groundwater. Highly reducing conditions are also indicated by low values of SO4/Cl ratio (ranges between 0 and 3.57). Topography, geology and river dynamics seem to govern the As contamination as depressions/low lying areas shows presence of high As in the aquifers. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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