Synthesis of zero-valent copper-chitosan nanocomposites and their application for treatment of hexavalent chromium

Shao Jung Wu, Tzong Horng Liou, Fwu Long Mi

Research output: Contribution to journalArticle

53 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)4348-4353
Number of pages6
JournalBioresource Technology
Volume100
Issue number19
DOIs
Publication statusPublished - Oct 2009
Externally publishedYes

Fingerprint

Chitosan
chromium
Copper
Chromium
Nanocomposites
copper
adsorption
ion
Ions
Adsorption
X-ray spectroscopy
transmission electron microscopy
resin
aqueous solution
scanning electron microscopy
Chelation
chromium hexavalent ion
Crosslinking
Energy dispersive spectroscopy
X ray photoelectron spectroscopy

Keywords

  • Chitosan-tripolyphosphate beads
  • Copper
  • Hexavalent chromium
  • Nanocomposites

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Waste Management and Disposal

Cite this

Synthesis of zero-valent copper-chitosan nanocomposites and their application for treatment of hexavalent chromium. / Wu, Shao Jung; Liou, Tzong Horng; Mi, Fwu Long.

In: Bioresource Technology, Vol. 100, No. 19, 10.2009, p. 4348-4353.

Research output: Contribution to journalArticle

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