Effective Cr(VI) removal from simulated groundwater through the hydrotalcite-derived adsorbent

Xu, Yunfeng, Zhang, Jia, Qian, Guangren, Ren, Zhong, Xu, Zhi Ping, Wu, Yueying, Liu, Qiang and Qiao, Shizhang (2010) Effective Cr(VI) removal from simulated groundwater through the hydrotalcite-derived adsorbent. Industrial and Engineering Chemistry Research, 49 6: 2752-2758. doi:10.1021/ie901469c


Author Xu, Yunfeng
Zhang, Jia
Qian, Guangren
Ren, Zhong
Xu, Zhi Ping
Wu, Yueying
Liu, Qiang
Qiao, Shizhang
Title Effective Cr(VI) removal from simulated groundwater through the hydrotalcite-derived adsorbent
Journal name Industrial and Engineering Chemistry Research   Check publisher's open access policy
ISSN 0888-5885
1520-5045
Publication date 2010-03-01
Year available 2010
Sub-type Article (original research)
DOI 10.1021/ie901469c
Open Access Status
Volume 49
Issue 6
Start page 2752
End page 2758
Total pages 7
Place of publication Washington D C, United States
Publisher American Chemical Society
Language eng
Formatted abstract
We investigated the feasibility of using calcined hydrotalcite (CHT) as the adsorbent of chromate to treat
Cr(VI)-contaminated water through column tests under varied conditions. The column tests reveal that CHT
can take up 34.3-44.7 mg(Cr)/g when the Cr(VI) concentration in the influent varies over a range of 50-200
mg/L (e.g., 0.96-3.85 mM) with pH 6-7 at 298 K. This uptake capacity is only reduced to 29.1 mg(Cr)/g
when HCO3- (1.0 mM) and Cl- (1.0 mM) coexist in the influent. We note that the treated water is of high
quality and is free of Cr(VI), with Mg and Al concentrations of <5-10 mg/L, and a pH of 6.5-7.0. The
quick desorption of Cr(VI) from the adsorbent (CHT) has enabled us to recover Cr(VI) from the contaminated
water and regenerate the adsorbent. All these findings promise CHT as an effective regenerable adsorbent for
the remediation of Cr(VI)-contaminated groundwater.
© 2010 American Chemical Society.
Keyword Layered double hydroxides
Hexavalent chromium
Anion-exchange
Aqueous solutions
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID 20477024
S30109
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2011 Collection
 
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Created: Sun, 28 Mar 2010, 10:05:00 EST