期刊
ENVIRONMENTAL EARTH SCIENCES
卷 70, 期 4, 页码 1699-1708出版社
SPRINGER
DOI: 10.1007/s12665-013-2257-7
关键词
Chhatarpur District; Groundwater quality; Nitrate; Fluoride; Hydrogeochemistry
资金
- Council for Scientific and Industrial Research (CSIR), New Delhi
- Japanese Government (Monbukagakusho-MEXT)
- Grants-in-Aid for Scientific Research [12F02778] Funding Source: KAKEN
The present study focuses on the hydrogeochemical composition of groundwater in Chhatarpur area with special focus on nitrate and fluoride contamination, considering the fact that groundwater is the only major source of drinking water here. Carbonate and silicate mineral weathering followed by ground water-surface water interactions, ion exchange and anthropogenic activities are mainly responsible for high concentrations of cations and anions in the groundwater in the region. The average concentration of nitrate and fluoride found in 27 samples is 1.08 and 61.4 mg/L, respectively. Nitrate enrichment mainly occurs in areas occupied with intense fertilizer practice in agricultural fields. Since the area is not dominated by industrialization, the possibility of anthropogenic input of fluoride is almost negligible, thus the enrichment of fluoride in groundwater is only possible due to rock-water interaction. The highly alkaline conditions, which favor the fluorite dissolution, are the main process responsible for high concentration of fluoride.
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