title: Thermodynamic study of adsorption of phenolic compounds onto Amberlite XAD-4 polymeric adsorbents and its acetylized derivative MX-4.
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 of equilibrium adsorption for all four phenolic compounds from their aqueous solutions increased around 20% on the acetylized resin, which may be contributed to the specific surface area and the partial polarity on the network. Estimations of the isosteric enthalpy, free energy, and entropy for the adsorption process were reported.
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210093, China. liaimin99@hotmail.com
authors.forename: Ai-min
authors.initials: AM
authors.lastname: Li
authors.forename: Quan-xing
authors.initials: QX
authors.lastname: Zhang
authors.forename: Jin-long
authors.initials: JL
authors.lastname: Chen
authors.forename: Zheng-hao
authors.initials: ZH
authors.lastname: Fei
authors.forename: Chao
authors.initials: C
authors.lastname: Long
mesh_terms: D000107:Acetylation; D000327:Adsorption; D010636:Phenols / Q000737:chemistry*; D011137:Polystyrenes / Q000737:chemistry*; D011145:Polyvinyls / Q000737:chemistry*; D013696:Temperature; D013816:Thermodynamics; D014874:Water Pollutants, Chemical; D018508:Water Purification / Q000379:methods*
chemical_list: D010636:Phenols; D011137:Polystyrenes; D011145:Polyvinyls; D014874:Water Pollutants, Chemical; C012101:XAD-4 resin