Abstract: In order to enhance biologic applicability of medicament and to reduce their medicial toxicity, chitosans ramification was derived from chitosan and 8-hydroxy quinoline through covalently binding between amido in chitosan and 5-chloromethyl-8-quinolinol hydrochloride, and its complex of ferrous were synthesized. Their compositions and structures were characterized by elementary analysis, IR spctra, UV-Vis spectra, fluorescence spectrophotometry and thermal analysis. It was found that the coordination was realized through binding of N, O in 8-hydroxy quinoline with the Fe(Ⅱ) in the ferrous complex. The optimizing coordination condition of ferrous complex that the reaction was carried out under stirring at 40 ℃ and pH=4 for 8 h. The sorption isotherm and sorption kinetics of CTS-HQ for ferrous ions were investigated and the results were satisfied with the Langmuir-single-molecule-layer adsorption mechanism. The apparent adsorption velocity constant K is 1.474 J/mg and the saturated sorption capacity Q is 86.96 mg/g at 293.15 K.

Key words: Chitosan derivative, 8-Hydroxy quinoline, Ferrous complex