Thermodynamic study of adsorption of phenolic compounds onto Amberlite XAD-4 polymeric adsorbents and its acetylized derivative MX-4

Article type: Research Article

Authors: Li, Ai-min^; | Zhang, Quan-xing | Chen, Jin-long | Fei, Zheng-hao | Long, Chao

Affiliations: Institute of Applied Chemistry & Environmental Engineering, Department of Chemistry,Yancheng Normal College,Yancheng 224002,China | State Key Laboratory of Pollution Control and Resources Reuse School of the Environment, Nanjing University, Nanjing 210093, China

Note: [] Correspondent author.E-mail: liaimin99@hotmail.com

Abstract: Adsorption equilibrium isotherms of phenolic compounds,phenol, p-cresol, p-chlorophenol and p-nitrophenol, from aqueous solutions by Amberlite XAD-4 polymeric adsorbent and its acetylized derivative MX-4 within temperature range of 283-323K were obtained and fitted to the Freundlich isotherms. The capacities ofequilibrium adsorption for all four phenolic compounds from theiraqueous solutions increased around 20% on the acetylized resin,which may be contributed to the specific surface area and thepartial polarity on the network. Estimations of the isosteric enthalpy, free energy , and entropy for the adsorption process are reported.

Keywords: macroporous polymeric adsorbent, phenolic compound, adsorption thermodynamic, temperature effect

Journal: Journal of Environmental Sciences, vol. 14, no. 4, pp. 457-463, 2002