Influence of cationic surfactant on adsorption of Cr(VI) onto activated carbon.
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).
Department of Environmental Engineering, Kumoh National Institute of Technology, 1 Yangho-dong, Gumi, Gyeongbuk 730 701, Republic of Korea.
Hyun-Doc
HD
Choi
Jung-Min
JM
Cho
Kitae
K
Baek
Jung-Seok
JS
Yang
Jae-Young
JY
Lee
D000327:Adsorption; D002244:Carbon / Q000737:chemistry*; D002412:Cations / Q000737:chemistry*; D002594:Cetylpyridinium / Q000737:chemistry; D002857:Chromium / Q000737:chemistry*; D004058:Diffusion; D007700:Kinetics; D008823:Micelles; D008956:Models, Chemical; D013501:Surface-Active Agents / Q000737:chemistry*; D013997:Time Factors; D014865:Waste Disposal, Fluid; D014874:Water Pollutants, Chemical; D018508:Water Purification
D002412:Cations; D008823:Micelles; D013501:Surface-Active Agents; D014874:Water Pollutants, Chemical; D002857:Chromium; D002244:Carbon; D002594:Cetylpyridinium