Ind. Eng. Chem. Res. 2006, 45, 5059-5065
5059
Biosorption Process for Treatment of Electroplating Wastewater Containing Cr(VI): Laboratory-Scale Feasibility Test Donghee Park,† Yeoung-Sang Yun,‡ Ji Hye Jo,† and Jong Moon Park*,† AdVanced EnVironmental Biotechnology Research Center, Department of Chemical Engineering, School of EnVironmental Science and Engineering, Pohang UniVersity of Science and Technology, San 31, Hyoja-dong, Pohang 790-784, South Korea, and DiVision of EnVironmental and Chemical Engineering, Research Institute of Industrial Technology, Chonbuk National UniVersity, 664-14ga, Duckjin-dong, Chonju 561-756, South Korea
Brown seaweed Ecklonia biomass was used for the treatment of electroplating wastewater that contains chromium and zinc ions. Batch experiments showed that Cr(VI) was removed from the wastewater through reduction to Cr(III) by contact with the biomass, whereas Cr(III) and Zn(II) were removed through adsorption to the binding sites of the biomass. Among various parameters, the solution pH most significantly affected the biosorptive capacity of the biomass. As the solution pH increased, the removal efficiency of Cr(VI) decreased, whereas that of Cr(III) and Zn(II) increased, for pH
