ISSN (0970-2083)

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Research Article Open Access

Leaching Kinetics of Fluoride in Sodic Saline Soil

Abstract

Leaching kinetics of fluoride by loading MgF2 on undisturbed vertical soil columns has been investigated and compared using various kinetic models. Linear relationship is established between the concentrations of leachable fluoride [F-]i and rate of leaching (LRobs). [F-]i and LRobs are found to decrease with increase in Na+ and Ca+2 levels of extractant, while an increase has been observed with increase in temperature and OH- ions. Maximum [F-]i are resulted with addition of NH4OH in percolating water and minimum with addition of KOH. Total leachable F-was found to be unaffected by incubation time. First Order model are found to be best fit for representing fluoride leaching in the present experimental conditions

S. Saxena, U. Chandrawat and A. Rani

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