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DOI : 10.17640/KSWST.2017.25.5.37 ,    Vol.25, No.5, 37 ~ 47, 2017
Title
A Study on the Removal Characteristics of Chromium(VI) from Metal Plating Wastewater Using Converter Slag
이혜진 Hae-jin Lee , 신현무 Hyun-moo Shin , 임수빈 Soo-bin Yim
Abstract
This study was conducted to investigate the removal characteristics of Cr(VI) from metal plating wastewater by converter slag. Approximately 60% of 100 mg/L Cr(VI) was removed by converter slag in strongly alkaline condition over pH 12. The pHzpc(zero point of charge) 11.0 of converter slag implies that anionic Cr(VI) species could be adsorbed on the surface of converter slag in acid and neutral pH conditions. Most of Fe species eluted from converter slag was found to be Fe(II), indicating that it could function as a reducing agent for the Cr(VI) in aqueous solution. It was found that the remonal of Cr(VI) by converter slag occurred very fast. The experimental results of this study suggested that converter slag could eliminate the Cr(VI) in aqueous solution through simultaneous reaction of adsorption and/or reduction.
Key Words
Converter slag, Cr(VI) removal, Elution of Fe(II), Metal plating wastewater, pHzpc
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