An XPS study of chromate and vanadate sorption mechanism by chitosan membrane containing copper nanoparticles

de Godoi, Fernanda Condi, Rodriguez-Castellon, Enrique, Guibal, Eric and Beppu, Marisa Masumi (2013) An XPS study of chromate and vanadate sorption mechanism by chitosan membrane containing copper nanoparticles. Chemical Engineering Journal, 234 423-429. doi:10.1016/j.cej.2013.09.006


Author de Godoi, Fernanda Condi
Rodriguez-Castellon, Enrique
Guibal, Eric
Beppu, Marisa Masumi
Title An XPS study of chromate and vanadate sorption mechanism by chitosan membrane containing copper nanoparticles
Journal name Chemical Engineering Journal   Check publisher's open access policy
ISSN 1385-8947
1873-3212
Publication date 2013-12
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.cej.2013.09.006
Open Access Status
Volume 234
Start page 423
End page 429
Total pages 7
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Collection year 2014
Language eng
Formatted abstract
Chitosan (CHI) membrane containing copper nanoparticles (Cu-NPs) is a potential sorbent for chromate and vanadate removal from aquatic environment. X-ray photo-electron spectroscopy (XPS) was employed to investigate the influence of Cu-NPs on Cr(VI) and V(V) sorption processes. XPS is a powerful technique to understand the mechanisms involved in metal binding to the polymer. X-ray Diffraction (XRD) and Transmission electron microscopy (TEM) confirmed the Cu-NPs presence inside CHI membrane. XPS spectra obtained after sorption showed that Cr(VI) and V(V) ions interact differently with CHI membrane containing Cu-NPs, although both species have similar reduction potentials: Cr(VI)/Cr(III), E0=+1.33V and V(V)/V(IV), E0=+1.00V against Cu(II)/Cu(I), E0=+0.16V. Cr(VI) was reduced to Cr(III) while Cu(I) was oxidized to Cu(II). On the other side, in the case of vanadate sorption, the interactions between vanadate species and CHI amine groups were more significant than the redox reactions involving copper.
Keyword Chitosan membrane
Copper nanoparticles
Cr(VI) and V(V) sorption
Redox reactions
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
School of Chemistry and Molecular Biosciences
 
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