THE THEORETICAL STUDY OF ADSORPTION OF METAL IONS ON CHITOSAN

作     者：LU Renqing ZHANG Hongyu QIU Guangmin LIU Chenguang 

作者机构：College of Chemistry and Chemical Engineering China University of Petroleum （East China） Dongying 257061 China Environmental Sanitation Office Municipal AdministrationYantai Economic and Technological Developmental Zone Yantai 264000 China College of Petroleum Engineering China University of Petroleum （East China） Dongying 257061 China 

出 版 物：《Chinese Journal of Reactive Polymers》 (中国反应性高分子（英文版）)

年 卷 期：2005年第14卷第1期

页      面：76-81页

学科分类：081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 081701[工学-化学工程] 

基　　金：The Ph. D. Foundation (Y030426) and Post-doctoral Foundation of China University of Petroleum (East China) 

主　　题：Density functional theory Basis set Effective core potential Chitosan, Metal ions. 

摘      要：The interactions between metal ions such as Zn2+, Pb2+, Mn2+, Hg2+, Cd2+, Ni2+ and chitosan have been investigated using the model cluster model method and density functional method. Full optimization and frequency analysis of all cluster models have been performed employing B3LYP hybrid method at 3-21G basis set level except metal ions which were invoked to use effective core potential (ECP) method. The energy changes, and the main structural parameters have been obtained during the theoretical study of the adsorption of metal ions on the chitosan. The calculations showed that the coordination modes of metal ions with chitosan models were different, the geometries of Mn2+, Zn2+, Cd2+, Hg2+, Pb2+ ions coordinated with two nitrogen atoms and two oxygen atoms were distorted tetrahedral, while the square planar structure of Ni2+ coordinated two nitrogen atoms and two oxygen atoms was observed. The heat of reaction between six metal ions and chitosan models showed the order: Mn2+ Ni2+ Zn2+ Pb2+ Hg2+ Cd2+, this suggested that the coordination strength of Mn2+ Ni2+ Zn2+ Pb2+ Hg2+ Cd2+.