화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.20, No.2, 365-374, March, 2003
DOI10.1007/BF02697254  Export Citation
Adsorption Characteristics of 2,4-Dichlorophenoxyacetic Acid and 2,4-Dinitrophenol in a Fixed Bed Adsorber
Sung Yong Cho†, Sook Jin Kim1, Tae Young Kim1, Hee Moon2, and Seung Jai Kim1
  • RRC for Photonic Materials and Devices, Chonnam National University, Gwangju 500-757, Korea
  • 1Department of Environmental Engineering, Chonnam National University, Gwangju 500-757, Korea
  • 2Faculty of Applied Chemistry, Chonnam National University, Gwangju 500-757, Korea
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The influence of temperature and initial pH of aqueous solution on adsorption has been discussed in detail using the Sips equation. Single-component adsorption equilibria of 2,4-D and 2,4-DNP dissolved in water have been measured for three kinds of GACs (F400, SLS103, and WWL). For 2,4-D, the magnitude of adsorption capacity was in the order of F400>SLS103>WWL, and that for 2,4-DNP was SLS103>F400>WWL. These results may come from the effects of the pore size distribution, surface area, surface properties, and difference in adsorption affinity. Kinetic parameters were measured in a batch adsorber to analyze the adsorption rates of 2,4-D and 2,4-DNP. The internal diffusion coefficients were determined by comparing the experimental concentration curves with those predicted from surface diffusion model (SDM) and pore diffusion model (PDM). The linear driving force approximation (LDFA) model was used to simulate isothermal adsorption behavior in a fixed bed adsorber and successfully simulated experimental adsorption breakthrough behavior under various operation conditions. Efficiency of desorption for 2,4-D and 2,4-DNP was about 80% using distilled water at pH of 6.
Keywords:Adsorption;Desorption;2,4-Dichlorophenoxyacetic Acid;2,4-Dinitrophenol;Equilibrium;Fixed Bed
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