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Evaluation of the Stability of Fe(III)-Impregnated Activated Carbon and Copper Adsorption  

Yu, Mok-Ryun (School of Civil and Environmental Engineering, Kwandong University)
Yang, Jae-Kyu (School of Civil and Environmental Engineering, Kwandong University)
Lee, Seung-Mok (School of Civil and Environmental Engineering, Kwandong University)
Kim, Keun-Han (Sunjin Environmental Co.)
Publication Information
Journal of Korean Society on Water Environment / v.22, no.2, 2006 , pp. 328-332 More about this Journal
Abstract
Fe(III)-impregnated activated carbon (Fe-AC) was applied in the treatment of synthetic wastewater containing Cu(II). To investigate the stability of Fe-AC at acidic condition, dissolution of Fe was studied with a variation of solution pH ranging from 2 to 4. Fe-AC was unstable at pH 2, showing a gradual increase of the dissoluted Fe as reaction time increased, while negligible amount of Fe was dissoluted above pH 3. This stability test suggests the applicability of Fe-AC in the treatment of wastewater above pH 3. Adsorption capacity of Cu(II) onto activated carbon (AC) and Fe-AC was investigated in a batch and a column test. In the adsorption kinetics, rapid adsorption of Cu(II) onto AC and Fe-AC was noted at initial reaction time and then reached a near complete equilibrium after 6 hrs. Adsorption trends of Cu(II) onto AC and Fe-AC were similar, showing an increased Cu(II) adsorption at higher pH. Compared with AC, Fe-AC showed a greater Cu(II) adsorption over the entire pH range studied in this research. From the adsorption isotherm obtained with variation of the concentration of Cu(II), the maximum adsorption capacity was identified as 61,700 mg/kg.
Keywords
Activated carbon; Adsorption; Copper; Fe(III);
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Times Cited By KSCI : 3  (Citation Analysis)
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