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Adsorption Behavior of Dithiocarbamate β-Chitosan Gels for Cadmium(II)

Keisuke Ohto, Shingo Ohta, Kai Huang, Hidetaka Kawakita and Katsutoshi Inoue

Adsorption gels were prepared by means of chemical modification of β-chitosan by immobilizing functional groups of dithiocarbamate to investigate its adsorption behavior for cadmium(II) such as effect of cross-linking, adsorption rate, pH dependency, loading capacity by batch-wise experimental work and mutual adsorptive separation of cadmium(II) from zinc(II) using a packed column. Thus prepared adsorption gel exhibited high selectivity towards cadmium(II) over zinc(II) and high loading capacity for cadmium(II) regardless of cross-linking. Satisfactory separation of cadmium(II) from zinc(II) was achieved using a packed column.