Synthesis of zero-valent copper-chitosan nanocomposites and their application for treatment of hexavalent chromium.
Bioresour Technol
; 100(19): 4348-53, 2009 Oct.
Article
in En
| MEDLINE
| ID: mdl-19414251
ABSTRACT
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.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Chromium
/
Copper
/
Chitosan
/
Nanocomposites
Language:
En
Journal:
Bioresour Technol
Journal subject:
ENGENHARIA BIOMEDICA
Year:
2009
Document type:
Article