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Dutta J.,Chaiduar College | Nath M.,North Eastern Regional Institute of Water and Land Management Tezpur | Chetia M.,Defence Research Laboratory | Misra A.K.,Gauhati University
International Journal of ChemTech Research | Year: 2010

Fluoride is very much essential for healthy growth of teeth and bones if it present between 0.6 ppm. to 1.5 ppm. in drinking water but if the level is higher than 1.5 ppm than causes dental and skeletal fluorosis, decalcification, digestive and nervous disorders occurs but less than 0.6 ppm. bones and teeth will be fragile. Fluoride concentrations in water samples (Surface and ground) were determined in fifteen small tea gardens of Sonitpur district, Assam, India. Fourty five samples were collected and analysed for Fluoride content along with pH, electrical conductivity (E.C), total hardness (T.H), sulphate (SO4 2-), nitrate (NO3 -), phosphate (PO4 2-), chloride (Cl-), calcium (Ca++) and magnesium (Mg++). Fluoride concentration is varied from 0.17 ppm. To 5.602 ppm. Fluoride concentration is not uniform of all the tea gardens area. Physicochemical conditions like decomposition, dissociation, subsequent dissolution and agrochemicals are might be responsible for leaching of fluoride in to the drinking water sources. From the correlation analysis F2- contents was found to be negatively correlated with Ca2+, Mg2+ and Total hardness and positively correlated with pH, SO4 2- and Cl-. Source

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