Removal of hexavalent chromium from aqueous solution by barium ion cross-linked alginate beads
Sesil Uzaşçı, Filiz Tezcan and F. Bedia Erim*
Istanbul Technical University, Department of Chemistry, 34469 Maslak, Istanbul, Turkey
Abstract. Barium ion cross-linked alginate beads have shown great affinity to toxic hexavalent chromium ions in aqueous solution, contrary to the traditional calcium alginate beads. The adsorption experiments were carried out by the batch contact method. The optimal pH for removal was found to be pH 4. The equilibrium was established in 4 h and the removal efficiency of chromium (VI) was found as 95%. The adsorption data fit well with Langmuir and Freundlich isotherms. The maximum chromium (VI) adsorption capacity determined from Langmuir isotherm was 36.5 mg/g dry alginate beads. Our study suggests that barium alginate beads can be used as cost-effective and efficient adsorbents for the removal of chromium (VI) from contaminated waters.
DOI: 10.1051/
COwned by the authors, published by EDP Sciences, 2014 ,
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Web of Conferences (201 ) 01
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This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Article available athttp://www.e3s-conferences.orgorhttp://dx.doi.org/10.1051/e3sconf/20130141024
