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Received November 4, 2005
Accepted February 18, 2006
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Adsorption and desorption characteristics of 2-methyl-4-chlorophenoxyacetic acid onto activated carbon
1Department of Environmental Engineering, Chonnam National University, Gwangju 500-757, Korea 2Environmental Research Institute, Chonnam National University, Gwangju 500-757, Korea
Korean Journal of Chemical Engineering, July 2006, 23(4), 638-644(7), 10.1007/BF02706807
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Abstract
Adsorption and desorption characteristics of the 2-methyl-4-chlorophenoxyacetic acid (MCPA) from aqueous solution onto the activated carbon (GAC, F-400) were studied. Adsorption equilibrium capacities of the MCPA increased with decreasing pH and temperature of the solution. Adsorption equilibrium of the MCPA could be represented by the Sips equation. The internal diffusion coefficients were determined by comparing the experimental concentration decay curves with those predicted from surface diffusion model and pore diffusion model. The adsorption model based on the linear driving force approximation (LDFA) was used for simulating the adsorption behavior of the MCPA in a fixed bed. Over ninety five percent desorption of the MCPA could be obtained using distilled water.
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Moon H, Tien C, Ind. Eng. Chem. Res., 26, 2024 (1987)
Mustonen R, Elovaara E, Zitting A, Arch. Toxicol., 63, 203 (1989)
Thiruvenkatachari R, Shim WG, Lee JW, Moon H, Korean J. Chem. Eng., 21(5), 1044 (2004)
Reddy JK, Lalwani ND, Crit. Rev. Toxicol., 12, 1 (1983)
Reid RC, Prausnitz JM, Pokung BE, The properties of gases and liquids, MaGraw-Hill Co., New York (1994)
Ruthven DM, Principles of adsorption and adsorption processes, John Wiley and Sons, New York (1984)
Traegner UK, Suidan MT, Water Res., 23, 267 (1989)
Wakao N, Funazkri, Chem. Eng. Sci., 33, 1375 (1978)
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