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Adsorption of Cu(II) ions from an aqueous solution by crosslinked amphoteric starch
Author(s) -
Xu ShiMei,
Feng Shun,
Yue Fan,
Wang JiDe
Publication year - 2004
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.13677
Subject(s) - adsorption , endothermic process , aqueous solution , starch , freundlich equation , chemistry , ammonium , polymer chemistry , metal ions in aqueous solution , nuclear chemistry , inorganic chemistry , ion , organic chemistry
Abstract The adsorption process of Cu(II) ions from aqueous solutions by crosslinked amphoteric starch with quaternary ammonium and carboxymethyl groups was investigated. The adsorption capacity was found to be dependent on the solution pH, the dose of the crosslinked amphoteric starch, and the initial concentration of Cu(II) ions. Moreover, the adsorption capacity increased with an increasing degree of substitution (DS) of the carboxymethyl groups. The adsorption followed a Freundlich adsorption isotherm. The adsorption process was endothermic, and the thermodynamic parameters were calculated at different DS values. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 728–732, 2004