Adsorbability of Chitosan and Chitosan Film to Cadmium
- VernacularTitle:壳聚糖及壳聚糖膜对水中镉的吸附性能的研究
- Author:
Chunmei DING
;
Yun SU
;
Xiaoting ZHANG
- Publication Type:Journal Article
- Keywords:
Cadmium;
Chitosan;
Adsorption
- From:
Journal of Environment and Health
1989;0(06):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the adsorption ability of the chitosan and the chitosan film to Cd2+. Methods Under the given condition,different time and different temperature and different beginning concentration of Cd2+, the adsorption rate and capability of the chitosan and the chitosan film were studied. Results The chitosan (or chitosan film) could adsorb Cd2+ quickly at first,however,an hour later,the adsorption rate declined slowly. Adsorption rate increased as the temperature increases. There was significant connection between the beginning concentration of Cd2+ and the adsorption rate and capability of the chitosan(or chitosan film). The adsorption rate of the chitosan (or chitosan film) even reached above 80% when the beginning concentration of Cd2+ was no more than 20 mg/L, whereas the adsorption rate and capability of the chitosan (or chitosan film) declined slowly when enhanced the beginning concentration of Cd2+. The adsorption rate and capability of the chitosan (or chitosan film) obtained a maximum only when the beginning concentration of Cd2+ was about 10 mg/L. The adsorptive ability of the chitosan film to Cd2+ was stronger than that of chitosan under the same condition. Conclusion The biosorption of the chitosan (or chitosan film) to Cd2+ fits the Langmuir equation and the adsorbability to Cd2+ of the chitosan film is stronger compared with chitosanb.
