화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.23, No.5, 812-818, September, 2006
DOI10.1007/BF02705933  Export Citation
Adsorption and desorption of phenylalanine and tryptophane on a nonionic polymeric sorbent
Jae-Wook Lee, Thi Phuong Binh Nguyen1, and Hee Moon1, †
  • Department of Environmental and Chemical Engineering, Seonam University, Namwon 590-711, Korea
  • 1Centre for Functional Nano Chemicals and Department of Applied Chemical Engineering, Chonnam National University, Gwangju 500-757, Korea
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Adsorption equilibrium of two amino acids - Phenylalanine (Phe) and Tryptophane (Trp) - onto nonionic polymeric sorbent, SP850 was studied under various pH values and temperatures. Adsorption equilibrium data of two amino acids on SP850 were fitted well with the Langmuir and Freundlich equations. Thermodynamic parameters such as Gibbs free energy (ΔG), enthalpy (ΔH), and entropy (ΔS) were evaluated by applying the Van’t Hoff equation. Besides, adsorption kinetic of Phe was also investigated. Adsorption kinetic data were analyzed using the models of pseudofirst- order, pseudo-second-order and intraparticle diffusion. The results indicated that the pseudo-second-order model was more successful in simulating the adsorption kinetic data and the adsorption rate was mainly controlled by the diffusion rate in adsorption process. On the other hand, desorption studies were conducted by employing different organic solvents such as isopropyl alcohol (IPA), ethanol, and methanol. It was found that IPA was the best material for desorbing amino acid on the polymeric sorbent.
Keywords:Adsorption;Desorption;Amino Acids;Nonionic Polymeric Sorbent
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