IJESD 2014 Vol.5(2): 202-206 ISSN: 2010-0264
DOI: 10.7763/IJESD.2014.V5.478
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).
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).
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.
General Information
- ISSN: 2010-0264 (Print); 2972-3698 (Online)
- Abbreviated Title: Int. J. Environ. Sci. Dev.
- Frequency: Bimonthly
- DOI: 10.18178/IJESD
- Editor-in-Chief: Prof. Richard Haynes
- Managing Editor: Ms. Cherry L. Chen
- Indexing: Scopus (CiteScore 2022: 1.4), Google Scholar, CNKI, ProQuest, EBSCO, etc.
- E-mail: ijesd@ejournal.net
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