期刊
BIORESOURCE TECHNOLOGY
卷 100, 期 19, 页码 4348-4353出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2009.04.013
关键词
Chitosan-tripolyphosphate beads; Copper; Nanocomposites; Hexavalent chromium
资金
- NSC of ROC [NSC 93-2211-E-131-002]
This study used ionotropic crosslinking to synthesize chitosan-tripolyphosphate chelating resin beads, which are used to fabricate zero-valent copper-chitosan nanocomposites. The copper nanoparticles were dispersed on chitosan-tripolyphosphate beads, and were thus able to maintain appropriate dispersion and stability, which greatly improves their applicability. The fabrication process contains two steps: using chitosan-tripolyphosphate beads to adsorb Cu(II) ions, followed by chemical reduction to reduce Cu(II) ions to zero-valent copper. This study explored the adsorption of synthesized chitosan-tripolyphosphate beads to Cu(II) ions, and used SEM/EDS, XPS, and TEM to examine the properties of zero-valent copper-chitosan nanocomposites. The results showed that, the adsorption behavior of hexavalent chromium from aqueous solution onto fabricated nanocomposites has better adsorption capacity than that of the chitosan-tripolyphosphate beads. (C) 2009 Elsevier Ltd. All rights reserved.
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