title: Adsorption kinetics of polyethylene glycol from aqueous solution onto activated carbon.
abstract: The adsorption equilibrium and kinetics of polyethylene glycol (PEG) in three aqueous systems were examined in this study. Langmuir isotherm was used to satisfactorily predict the adsorption capacity of PEG on activated carbon F-400 and applied to the investigation of adsorption kinetics. The surface diffusion, pore diffusion, and branched pore kinetics models successfully described the adsorption behavior of PEG on F-400 in the completely stirred tank reactor. The pore diffusion coefficients obtained from the pore diffusion model were compared with those computed by the experimental data of the short fixed-bed reactor combined with the assumption of non-hindered pore diffusion. In addition, the effects of initial concentrations of PEG and the relative importance of external and internal mass transfers for the adsorption were also taken into account and discussed in this study.
authors.affiliation: Graduate Institute of Environmental Engineering, National Taiwan University, 71 Chou-Shan Road, Taipei 106, Taiwan.
authors.forename: C-F Chiung-Fen
authors.initials: CF
authors.lastname: Chang
authors.forename: C-Y Ching-Yuan
authors.initials: CY
authors.lastname: Chang
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Höll
authors.forename: Markus
authors.initials: M
authors.lastname: Ulmer
authors.forename: Y-H Yi-Hung
authors.initials: YH
authors.lastname: Chen
authors.forename: H-J Hans-Jügen
authors.initials: HJ
authors.lastname: Gross
mesh_terms: D000327:Adsorption; D002606:Charcoal / Q000737:chemistry*; D007700:Kinetics; D011092:Polyethylene Glycols / Q000302:isolation & purification*; D012996:Solutions; D013816:Thermodynamics; D014867:Water; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D012996:Solutions; D014874:Water Pollutants, Chemical; D014867:Water; D002606:Charcoal; D011092:Polyethylene Glycols