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Inferring the chemical parameters for the dissolution of fluoride in groundwater of Bastar zone, Chhattisgarh, India

Author Affiliations

  • 1Department of Chemistry, NMDC DAV Polytechnic, Dantewada, Chhattisgarh, India-494441

Res.J.chem.sci., Volume 7, Issue (2), Pages 54-59, February,18 (2017)

Abstract

Physico-chemical data highlight that high content of F- in groundwater of study area due to dissociation, decomposition and dissolution of fluoride-bearing minerals. Few physico-chemicals parameters also give positive correlation with F- ion dissolution. These groundwater are alkaline in pH (7.54-8.55), HCO3- concentration varies from 266-370 mg/l and F- concentration from 1.6-7.68 mg/l. Presence of F- bearing mineral in bedrock is not only factor but physico-chemical environment like aqueous ionic species, residence time of interaction, chemical behavior of free F- ion with other cations and anions in groundwater, play key role of its dissolution. This study indicates that 82% groundwater samples have EC- 940-1750 ÁS/cm and pH >7.8 Ionic concentration Ca2+, HCO3-, Cl- and Na+ in groundwater show strong positive relation with F- ion concentration.

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