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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received February 8, 2012
Accepted May 19, 2012

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Selective adsorption for indium(III) from industrial wastewater using chemically modified sawdust

Taik-Nam Kwon Choong Jeon^†

Department of Biochemical Engineering, Gangneung-Wonju National University, Gangneung, Daehangno, 120, Gangneung, Gangwon-do 210-702, Korea

metaljeon@gwnu.ac.kr

Korean Journal of Chemical Engineering, December 2012, 29(12), 1730-1734(5), 10.1007/s11814-012-0069-1

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Abstract

To selectively adsorb indium(III) in industrial wastewater coexisting with zinc(II), the surface of sawdust was modified into phosphate groups through chemical reaction. Among various manufacturing methods, phosphorylated sawdsust made from using non-grinding sawdust with same ratio (based on volume) of H3PO4 and distilled water had a very high selectivity to indium(III), which shows removal efficiency of about 90% with 1.0 g at pH 3.5. Meanwhile, in case of zinc(II), there is almost no adsorption onto phosphorylated sawdust. The surface condition and phosphorus content of phosphorylated sawdust were analyzed by scanning electron microscopy (SEM) photograph and energy dispersive x-ray (EDX) spectrum. Also, the effects of loading of adsorbent and time on selective adsorption characteristics of indium(III) were investigated.

Keywords

Indium(III) Sawdust Phosphate Selectivity Adsorption

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