Rapid removal of fluoride from aqueous media using activated dolomite

Chaudhary, Veena and Prasad, Surendra (2015) Rapid removal of fluoride from aqueous media using activated dolomite. Analytical Methods, 7 . pp. 8304-8314. ISSN 1759-9679

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Abstract

Fluoride is one of the most omnipresent groundwater pollutants. Thus the objective of this paper was to
evaluate the efficiency of thermally activated dolomite for the removal of fluoride. An inexpensive and
widely available geomaterial, dolomite, was shown to have excellent fluoride removal properties from
aqueous media. The batch experiments were performed under static and shaking conditions using
thermally activated dolomite powder where equilibrium was reached just within 5 min under shaking
conditions with 90.87% fluoride removal. The fluoride removal capacity of the dolomite at pH 7.0 is
243.25 mg g-1 which is in excellent agreement with the theoretically calculated value of 240.21 mg g-1
.
The uptake of fluoride by the thermally activated dolomite mainly followed an ion-exchange mechanism,
pseudo-second order kinetics and the Freundlich isotherm. Scanning electron microscopy with energy
dispersive X-ray (SEM-EDX) and X-ray diffraction studies demonstrated the thermally activated dolomite
as an excellent material for fluoride removal. The proposed method is quite effective and practical for
the defluoridation of drinking as well as waste water in comparison to literature reported methods

Item Type:	Journal Article
Subjects:	Q Science > Q Science (General) Q Science > QD Chemistry
Divisions:	Faculty of Science, Technology and Environment (FSTE) > School of Biological and Chemical Sciences
Depositing User:	Fulori Nainoca - Waqairagata
Date Deposited:	11 Apr 2016 03:39
Last Modified:	19 Jun 2018 01:48
URI:	https://repository.usp.ac.fj/id/eprint/8806

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