Abstract: Elevated ground water fluoride concentration and hydrochemical data are presented for groundwater samples, collected from different blocks of Birbhum district, West Bengal, India, belonging to different geological regions. Dubrajpur(unclassified gneiss), Rampurhat-1(Igneous). From Dubrajpur block total 31 samples including hotspring, dugwell and deeptubewell samples were collected during November, 2011 and from Rampurhat-1 block total 63 samples including shallow and deep tubewells were collected during February, 2011 for comparative assessment of the groundwater fluoride status and overall chemical quality and suitability for domestic and agricultural use. Other parameters analyzed for pH ,Total Dissolved Solid (TDS), Electrical Conductivity(EC), Sulphate(SO42-), Nitrate(NO3-), phosphate(PO43-), Fluoride(F-), Calcium(Ca2+), Magnesium(Mg2+), Sodium(Na+), Potassium(K+), Bicarbonate(HCO3-), carbonate(CO32-), and Total Hardness(TH) using standard techniques. Obtained results show that among both Dubrajpur and Rampurhat-1 samples several parameters were found to be elevated. Sodium adsortion ratio (SAR) values were within the permissible limit in all the Dubrajpur samples but among Rampurhat-1 samples two were elevated (Asanjola and Madhabpur village). Rest of the samples were within the permissible limit. %Na and residual sodium carbonate (RSC) value were within the permissible limit among all the Dubrajpur samples but among the Rampurhat 1 samples %Na was found to be unsuitable (3 samples) and doubtful (3 samples). RSC value was found to be above 1 among 3 Asanjola, 3 Narayanpur and 2 Madhabpur village samples of Rampurhat-1. Birbhum district is a groundwater fluoride affected district and among several samples of both Dubrajpur and Rampurhat-1 block fluoride concentration was found to be elevated. Fluoride concentration seems to have a positive relation to pH, sodium and carbonate whereas a negative relation to magnesium and calcium. The degree of weathering of the silicate minerals as indicated by the sodium acquired by the ground waters may have a decisive role in fluoride enrichment process. The overall obtained results of fluoride and other parameters reveal that Rampurhat-1 block is more worstly affected in comparison to Dubrajpur.
Keywords: Ground water quality, Fluoride concentration, related parameters, Dubrajpur and Rampurhat 1 block, Birbhum district, West Bengal, India.
Title: COMPARATIVE ASSESSMENT OF FLUORIDE CONCENTRATION AND HYDROCHEMICAL ANALYSIS OF GROUND WATER OF DUBRAJPUR AND RAMPURHAT-I BLOCK, BIRBHUM, WEST BENGAL, INDIA
Author: Sakuntala Chakrabarti, Pulak Kumar Patra
International Journal of Interdisciplinary Research and Innovations
ISSN 2348-1218 (print), ISSN 2348-1226 (online)
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