Synthesis of Porous Cross-linked Grafted Chitosan and Its Application for Metal Ion Adsorption
A water-soluble intermediate bi-functional compound with thioureido and carboxyl groups was prepared by reacting chitosan with ammonium thiocyanate and chloroacetic acid. The intermediate compound was then cross-linked by epichlorohydrin to prepare a novel water-insoluble cross-linked chitosan aiming to be used as an adsorbent for heavy metal wastewater treatment. Both the intermediate compound and the cross-linked grafted chitosan (CGCTS) were characterized by using FTIR, SEM and specific surface area measurement. The analysis results indicated that the -COOH and -HN-C(S)-NHCOOH-groups have been grafted onto the chitosan molecular chain. The CGCTS displayed a porous structure with a pore size typically below 100 nm and a specific surface area of 90.6 m2/g. The synthesized porous chitosan demonstrated a good adsorption capability for Cu2+, Ni2+ and Co2+ ions. Regeneration study of the synthesized porous CGCTS showed no decrease in adsorption capability after three regeneration cycles.
porous materials cross-linked chitosan adsorption materials wastewater treatment
Liuhui
China Institute for Radiation Protection Taiyuan,Shanxi
国际会议
北京
英文
1-4
2009-06-11（万方平台首次上网日期，不代表论文的发表时间）