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Received January 19, 2009
Accepted March 2, 2009
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Adsorption of 2,4-dichlorophenol on metal-nitrate modified activated carbon
Department of Chemical and Biomolecular Engineering, Yonsei University, 262 Sungsanno Seodaemun-gu, Seoul 120-749, Korea
Korean Journal of Chemical Engineering, September 2009, 26(5), 1379-1382(4), 10.1007/s11814-009-0217-4
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Abstract
To remove 2,4-dichlorophenol (2,4-DCP) from aqueous solution, the surface of the activated carbon was first treated with HCl and then the surface was modified by using various metal ions (Cu, Co, Fe, Ni, Zn, and Mg). Metal doping significantly enhanced the adsorption efficiency of activated carbon, an effect that was further increased by HCl treatment of the modified activated carbons. Of all the preparations, the zinc(II)-modified activated carbon with HCl treatment showed the highest adsorption capacity for 2,4-DCP. Analysis of the zinc(II)-modified activated carbon_x000D_
by SEM and BET showed a surface area and micropore volume of around 1,154.69 m2/g and 0.291 cm3/g, respectively, values about 20% higher than in the starting material. In the pH range of 2.0-11.0, the maximum uptake of 2,4-DCP from an initial concentration of 1,000 mg/L was 508 mg/g at pH 4.0.
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References
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