Study on the preparation of EDTA-chitosan and its adsorption on Cd2+
YANG Xihong
XIN Rongyu
ZHANG Jingyu
YU Wenlu
ZHANG Junyi
LI Yujin
XIE Wancui
Abstract：EDTA-chitosan was prepared through the acylation modification between EDTA-2Na and chitosan.The preparation conditions of EDTA-chitosan were optimized by single factor test combined with orthogonal optimization test. The comparative analysis of Cd2+adsorption properties of EDTA-chitosan was made with that of chitosan hydrochloride, chitosan quaternary ammonium salt, hydroxypropyl chitosan and chitosan lactate.The results showed that the optimum preparation conditions of EDTA-chitosan were as follows: the mass ratio of EDTA-2Na and CTS was 2∶1, the pH value was 5. 5, the concentration of EDAC was 40 mmol/L, and the reaction time was 16 h. The verification experiment under these conditions showed that the average Cd2+adsorption rate of EDTA-chitosan was 53. 04％. Moreover, the comparative experiment revealed that EDTAchitosan had better Cd2+adsorption effect than other chitosan derivatives under the same conditions.
Keywords：EDTA-chitosanacylation modificationCd2+ adsorption
Publication Date：2018-11-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 1-7 )