期刊
CARBOHYDRATE POLYMERS
卷 98, 期 1, 页码 736-743出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2013.06.001
关键词
Collagen; Cellulose; Ionic liquid; Cu(II); Adsorption
资金
- National Natural Science Foundation of China [21106011, 21276034]
- Department of Education of Liaoning Province [L2012195]
A novel adsorbent, biodegradable collagen/cellulose hydrogel beads (CCHBs), was prepared by reconstitution from a 1-butyl, 3-methylimidazolium chloride ([C(4)mim]CI) solution. The adsorption properties of the CCHBs for Cu(II) ion removal from aqueous solutions were investigated and compared with those of cellulose hydrogel beads (CHBs). The CCHBs have a three-dimensional macroporous structure whose amino groups are believed to be the main active binding sites of Cu(II) ions. The equilibrium adsorption capacity (q(e)) of the CCHBs is greatly influenced by the collagen/cellulose mass ratio, and steeply increases until the collagen/cellulose mass ratio exceeds 2/1. The maximum adsorption is obtained at pH 6. The q(e) of Cu(II) ions increases with increased initial concentration of the solution. Based on Langmuir isotherms, the maximum adsorption capacity (q(m)) of CCHB3 (collagen/cellulose mass ratio of 3/1) is 1.06 mmol/g. The CCHBs maintain good adsorption properties after the fourth cycle of adsorption-desorption. (C) 2013 Elsevier Ltd. All rights reserved.
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