Fluoride contamination of groundwater and its seasonal variability in parts of Purulia district, West Bengal, India

Farooq, Syed Hilal and Prusty, Pintu and Singh, Raj Kumar and Sen, Subhajit and D, Chandrasekharam (2018) Fluoride contamination of groundwater and its seasonal variability in parts of Purulia district, West Bengal, India. Arabian Journal of Geosciences, 11 (22). pp. 1-13. ISSN 1866-7511

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Abstract

The contamination of aquifers by fluoride and arsenic is a major cause of concern in several parts of India. A study has thus been conducted to evaluate the extent and severity of fluoride contamination and also its seasonal variability. Two blocks (Purulia-1 and Purulia-2) were considered for this purpose. Twenty groundwater samples (in each season) were collected from tube wells during the pre-monsoon and post-monsoon seasons. In addition to fluoride, groundwater samples were also analyzed for major cations, anions, and other trace elements. The concentration of fluoride shows significant seasonal variation and ranges between 0.94–2.52 and 0.25–1.43 mg/l during the pre-monsoon and post-monsoon seasons, respectively. In pre-monsoon season, more than 40% of the water samples show fluoride concentrations higher than the WHO limit. However, during the post-monsoon season, none of the groundwater sample shows fluoride concentrations higher than the WHO limit. Lesser concentration during the post-monsoon season is attributed to the dilution effect by the percolating rainwater, which has also been reflected in the form of a decrease in concentrations of other elements. The petrographic studies of the rock samples collected from the study area show that the rocks are mainly composed of plagioclase, orthoclase, and quartz with abundant biotite. The weathering and dissolution of biotite plays an important role in controlling the fluoride concentrations in the groundwater of the study area.

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IITH Creators:
IITH CreatorsORCiD
D, ChandrasekharamUNSPECIFIED
Item Type: Article
Uncontrolled Keywords: Fluoride contamination, Groundwater contamination, Seasonal variability
Subjects: Civil Engineering
Divisions: Department of Civil Engineering
Depositing User: Team Library
Date Deposited: 29 Nov 2018 09:18
Last Modified: 29 Nov 2018 09:18
URI: http://raiith.iith.ac.in/id/eprint/4577
Publisher URL: http://doi.org/10.1007/s12517-018-4062-9
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