Removal of Bromide from Desalinated Water Using Hydrotalcite - Volume 5 Number 2 (April 2014) - IJESD
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    • ISSN: 2010-0264
    • Frequency: Bimonthly (2010-2014); Monthly (Since 2015)
    • DOI: 10.18178/IJESD
    • Editor-in-Chief: Prof. Richard Haynes
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Editor-in-chief
The University of Queensland, Australia
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IJESD 2014 Vol.5(2): 202-206 ISSN: 2010-0264
DOI: 10.7763/IJESD.2014.V5.478

Removal of Bromide from Desalinated Water Using Hydrotalcite

Takaaki Wajima
Abstract—Bromide (Br) can form disinfection by-products (DBPs) in drinking water sterilization (chlorination or ozonation) processes, and these DBPs have adverse effects on human health. In this study, we tried to remove Br from desalinated water, which was produced from seawater by spray flash desalination, using hydrotalcite (HT), before sterilization, for use as drinking water. Although HT did not remove Br from desalinated water by ion exchange, calcined HT removed Br by reconstruction. Br removal by reconstruction of calcined HT became saturated at sample/solution = 2 g/L after reaction for 2 h, and increased with increasing temperature. The adsorption kinetics was examined based on pseudo-first-order and pseudo-second-order reaction models, and the adsorption rate constants for these kinetics models were calculated. Adsorption experiments demonstrated that the adsorption process fitted a pseudo-second-order kinetics model better than a pseudo-first-order model.

Index Terms—Br removal, hydrotalcite, ion exchange, reconstruction.

Takaaki Wajima is with the Department of Urban Environment Systems, Graduate School of Engineering, Chiba University, Japan (e-mail: wajima@ tu.chiba-u.ac.jp).

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Cite:Takaaki Wajima, "Removal of Bromide from Desalinated Water Using Hydrotalcite," International Journal of Environmental Science and Development vol. 5, no. 2, pp. 202-206, 2014.

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