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Issue 5, 2010
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Reduction and immobilization of chromium(vi) by nano-scale Fe0 particles supported on reproducible PAA/PVDFmembrane

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Abstract

A new class of nano-scale Fe0 particles (NZVI) supported on a PAA/PVDF membrane (NZVI-PAA/PVDF) were synthesized and the feasibility of using NZVI-PAA/PVDF for reductive immobilization of Cr(VI) in water was investigated through laboratory batch tests. The results showed that the Cr(VI) removal capacity of NZVI-PAA/PVDF was 181 mg Cr/g Fe at an initial Cr(VI) concentration of 20 mg L−1 under pH 6.5 ± 0.1. XPS results showed that Cr(VI) was converted to nontoxic Cr(III). Interfering ions exerted various degrees of impact on NZVI-PAA/PVDF's Cr(VI) removal capacity. Specifically, Ca2+ alone showed the mildest impact while the presence of ions (Mg2+ and HCO3) exerted the greatest impact. An advantage of NZVI-PAA/PVDF is that the nano-scale Fe0 and resultant particles were combined within a PAA/PVDF membrane, which prevents secondary pollution. Moreover, a piece of PAA/PVDF membrane (4.7 cm diameter) can still support 6.51 mg of nano-scale Fe0 particles after being renewed.

Graphical abstract: Reduction and immobilization of chromium(vi) by nano-scale Fe0 particles supported on reproducible PAA/PVDF membrane

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Article information


Submitted
24 Sep 2009
Accepted
18 Jan 2010
First published
25 Feb 2010

J. Environ. Monit., 2010,12, 1153-1158
Article type
Paper

Reduction and immobilization of chromium(VI) by nano-scale Fe0 particles supported on reproducible PAA/PVDF membrane

S. Li, T. Li, Z. Xiu and Z. Jin, J. Environ. Monit., 2010, 12, 1153
DOI: 10.1039/B919909H

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