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Effect of complexing agents on liquid‐phase adsorption and desorption of copper(II) using chitosan
Author(s) -
Tseng RuLing,
Wu FengChin,
Juang RueyShin
Publication year - 1999
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/(sici)1097-4660(199906)74:6<533::aid-jctb79>3.0.co;2-o
Subject(s) - tartaric acid , desorption , chemistry , adsorption , ethylenediaminetetraacetic acid , chitosan , copper , citric acid , aqueous solution , chelation , langmuir adsorption model , diffusion , inorganic chemistry , nuclear chemistry , organic chemistry , physics , thermodynamics
The effect of complexing agents on adsorption and desorption of Cu(II) from aqueous solutions using chitosan was investigated. Three complexing agents were used including EDTA (ethylenediaminetetraacetic acid), citric acid, and tartaric acid. It was shown that the isotherm data could be fitted by the Langmuir equation under a limited concentration range. Furthermore, the adsorption processes were analyzed by an intraparticle diffusion model and the rate parameters of intraparticle diffusion for Cu(II) adsorption could be correlated with the initial Cu(II) concentrations. Finally, the desorption of Cu(II) and its complexes from the loaded chitosan was tested using complexing agent solutions. Under comparable conditions, tartaric acid solution gave the best desorption efficiency. © 1999 Society of Chemical Industry