Premium
Kinetics and equilibrium of cobalt ion adsorption on cross‐linked polyethylenimine membrane
Author(s) -
Shentu Baoqing,
Zhu Qing,
Liu Qun,
Weng Zhixue
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.26378
Subject(s) - cobalt , polyethylenimine , adsorption , enthalpy , membrane , langmuir adsorption model , chemistry , equilibrium constant , kinetics , langmuir , ion , inorganic chemistry , reaction rate constant , thermodynamics , organic chemistry , transfection , biochemistry , physics , quantum mechanics , gene
The kinetics and equilibrium of cobalt ion adsorption on crosslinked polyethylenimine (PEI) membrane were studied by the spectroscopic method in terms of time, cobalt ion concentration, and temperature. It was found that the adsorption of cobalt ion on crosslinked PEI membrane obeyed the pseudofirst‐order kinetic model and the equilibrium adsorption amount of cobalt ion on crosslinked PEI membrane was closely related to the initial cobalt ion concentration. The equilibrium adsorption amount increased with the decrease of temperature and obeyed a Langmuir isotherm to give the equilibrium constant for the adsorption of cobalt ion on crosslinked PEI membrane under various temperatures. Based on Van't Hoff equation the enthalpy and entropy of the adsorption of cobalt ion on crosslinked PEI membrane were determined to be −12.9 kJ mol −1 and −107 J mol −1 K −1 , respectively. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007