Influence of cationic surfactant on adsorption of Cr(VI) onto activated carbon

Title
Influence of cationic surfactant on adsorption of Cr(VI) onto activated carbon
Authors
최현덕조정민백기태양중석이재영
Keywords
activated carbon; surfactant; Cr(VI); chromate; adsorption kinetic; adsorption isotherm
Issue Date
2009-01
Publisher
Journal of hazardous materials
Citation
VOL 161, NO 2-3, 1565-1568
Abstract
The effect of a cationic surfactant on the adsorption of Cr(VI) on activated carbon was investigated using cetylpyridinium chloride (CPC). At a concentration below the critical micelle concentration (CMC) of CPC, the adsorption of CPC and Cr(VI) reached equilibrium within 60 min, while it took 180 min at the concentration above CMC. CPC decreased the adsorption rate of Cr(VI) and increased the adsorption amount of Cr(VI) onto activated carbon. To analyze adsorption phenomena of Cr(VI), adsorption kinetic and isotherm were used and fitted well with the pseudo-second order kinetic model and Langmuir adsorption model, respectively. CPC introduced a cationic functional group on the surface of activated carbon and provided an adsorption site for Cr(VI).
URI
http://pubs.kist.re.kr/handle/201004/34794
ISSN
0304-3894
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