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KMID : 1024520170260050609
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Journal of the Environmental Sciences
2017 Volume.26 No. 5 p.609 ~ p.619
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Removal of 2,4-Dinitrophenol from an Aqueous Solution by Wood-Based Activated Carbon
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Ju Chang-Sik
Lee Min-Gyu
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Abstract
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The removal characteristics of 2,4-dinitrophenol (2,4-DNP) from an aqueous solution by commercial Wood-based Activated Carbon (WAC) have been studied. The effects of various experimental parameters were investigated using a batch adsorption technique. The adsorption capacity of 2,4-DNP by WAC increased with a decrease in the dosage and particle size of WAC, temperature and the initial pH of the solution, and increased with an increase in the initial concentration of the solution. The adsorption equilibrium data were best described by the Redlich-Peterson isotherm model. The maximum adsorption capacities of 2,4-DNP by WAC were 573.07 mg/g at 293 K, 500.00 mg/g at 313 K, and 476.19 mg/g at 333 K, decreasing with increasing temperature. The kinetic data were well fitted to the pseudo-second-order model, and the results of the intra-particle diffusion model suggested that the adsorption process was mainly controlled by particle diffusion. The thermodynamic analysis indicated that the adsorption of 2,4-DNP by WAC was an endothermic and spontaneous process.
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KEYWORD
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Adsorption, 2,4-Dinitrophenol, Activated carbon, Phenolic compound, Kinetic model
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