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Water Science & Technology Vol 65 No 10 pp 1863–1868 © IWA Publishing 2012 doi:10.2166/wst.2012.891 Sorption of benzoic acid from aqueous solution by cetyltrimethylammonium bromide modified birnessiteNan-Hui Wang and Shang-Lien LoGraduate Institute of Environmental Engineering, National Taiwan University, No. 71, Zhoushan Road, Taipei City 106, Chinese Taiwan, China E-mail: sllo@ntu.edu.twABSTRACT Layered manganese oxide (birnessite) has been studied for its use as catalytic materials. The research presented in this study investigates the sorption of benzoic acid from water on synthesized cetyltrimethylammonium bromide modified birnessite (CTAB-birnessite). The synthesized CTAB-birnessite was characterized by X-ray powder diffraction (XRD). The experimental results of sorption kinetic were well fitted to the pseudo-second-order equation. The sorption isotherms were linear at different pH values, and it indicates a partition mechanism. Up to about 53% of the dissolved benzoic acid was sorbed by CTAB-birnessite; in contrast, only 16% of the dissolved benzoic acid was sorbed by birnessite. These results indicate that CTAB-birnessite can be a potential sorbent for benzoic acid removal. Keywords: benzoic acid; birnessite; sorption eProduct: Buy this article for £24.00 (IWA MEMBER PRICE: £18.00) All prices include VAT. For customers where VAT should not be applied, the VAT amount will be removed upon payment |
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