Hexavalent chromium removal from near natural water by copper-iron bimetallic particles

Ching Yao Hu; Shang Lien Lo; Ya Hsuan Liou; Ya Wen Hsu; Kaimin Shih; Chin Jung Lin

doi:10.1016/j.watres.2010.02.037

Hexavalent chromium removal from near natural water by copper-iron bimetallic particles

Ching Yao Hu, Shang Lien Lo, Ya Hsuan Liou, Ya Wen Hsu, Kaimin Shih, Chin Jung Lin

School of Public Health

Research output: Contribution to journal › Article › peer-review

128 Citations (Scopus)

Abstract

The reduction of hexavalent chromium (Cr(VI)) by zero-valent iron (ZVI) is self-inhibiting in near natural groundwater because insulating Fe(III)-Cr(III) (oxy)hydroxide film forms on the ZVI surface during the reaction. This study tries to overcome this deficiency by coating the surface of ZVI with copper to form copper-iron bimetallic particles. The Cr(VI) removal rate by ZVI rose significantly after the copper coating was applied. The copper loading needed for enhancing Cr(VI) removal was much higher than that needed for enhancing removal of chlorinated organic compounds or other oxidative contaminants, because of the higher oxidation potential of Cr(VI). The results of X-ray photoelectron spectroscopy (XPS) indicate that coating copper onto the surface of ZVI can not only increase the deepness of the oxidation film but also increase the oxidation state of iron in the film. This phenomenon means higher Cr(VI) removal capacity per unit weight of ZVI.

Original language	English
Pages (from-to)	3101-3108
Number of pages	8
Journal	Water Research
Volume	44
Issue number	10
DOIs	https://doi.org/10.1016/j.watres.2010.02.037
Publication status	Published - May 2010

Keywords

Copper
Copper-iron bimetallic particles
Hexavalent chromium (Cr(VI))
X-ray photoelectron spectroscopy (XPS)
Zero-valent iron (ZVI)

ASJC Scopus subject areas

Water Science and Technology
Waste Management and Disposal
Pollution
Ecological Modelling

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10.1016/j.watres.2010.02.037

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title = "Hexavalent chromium removal from near natural water by copper-iron bimetallic particles",

abstract = "The reduction of hexavalent chromium (Cr(VI)) by zero-valent iron (ZVI) is self-inhibiting in near natural groundwater because insulating Fe(III)-Cr(III) (oxy)hydroxide film forms on the ZVI surface during the reaction. This study tries to overcome this deficiency by coating the surface of ZVI with copper to form copper-iron bimetallic particles. The Cr(VI) removal rate by ZVI rose significantly after the copper coating was applied. The copper loading needed for enhancing Cr(VI) removal was much higher than that needed for enhancing removal of chlorinated organic compounds or other oxidative contaminants, because of the higher oxidation potential of Cr(VI). The results of X-ray photoelectron spectroscopy (XPS) indicate that coating copper onto the surface of ZVI can not only increase the deepness of the oxidation film but also increase the oxidation state of iron in the film. This phenomenon means higher Cr(VI) removal capacity per unit weight of ZVI.",

keywords = "Copper, Copper-iron bimetallic particles, Hexavalent chromium (Cr(VI)), X-ray photoelectron spectroscopy (XPS), Zero-valent iron (ZVI), Copper, Copper-iron bimetallic particles, Hexavalent chromium (Cr(VI)), X-ray photoelectron spectroscopy (XPS), Zero-valent iron (ZVI)",

author = "Hu, {Ching Yao} and Lo, {Shang Lien} and Liou, {Ya Hsuan} and Hsu, {Ya Wen} and Kaimin Shih and Lin, {Chin Jung}",

note = "Funding Information: The authors thank the National Science Council of Taiwan for financial support of this work under contract NSC 93-2211-E-002-035.",

year = "2010",

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doi = "10.1016/j.watres.2010.02.037",

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AU - Hu, Ching Yao

AU - Lo, Shang Lien

AU - Liou, Ya Hsuan

AU - Hsu, Ya Wen

AU - Shih, Kaimin

AU - Lin, Chin Jung

N1 - Funding Information: The authors thank the National Science Council of Taiwan for financial support of this work under contract NSC 93-2211-E-002-035.

PY - 2010/5

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N2 - The reduction of hexavalent chromium (Cr(VI)) by zero-valent iron (ZVI) is self-inhibiting in near natural groundwater because insulating Fe(III)-Cr(III) (oxy)hydroxide film forms on the ZVI surface during the reaction. This study tries to overcome this deficiency by coating the surface of ZVI with copper to form copper-iron bimetallic particles. The Cr(VI) removal rate by ZVI rose significantly after the copper coating was applied. The copper loading needed for enhancing Cr(VI) removal was much higher than that needed for enhancing removal of chlorinated organic compounds or other oxidative contaminants, because of the higher oxidation potential of Cr(VI). The results of X-ray photoelectron spectroscopy (XPS) indicate that coating copper onto the surface of ZVI can not only increase the deepness of the oxidation film but also increase the oxidation state of iron in the film. This phenomenon means higher Cr(VI) removal capacity per unit weight of ZVI.

AB - The reduction of hexavalent chromium (Cr(VI)) by zero-valent iron (ZVI) is self-inhibiting in near natural groundwater because insulating Fe(III)-Cr(III) (oxy)hydroxide film forms on the ZVI surface during the reaction. This study tries to overcome this deficiency by coating the surface of ZVI with copper to form copper-iron bimetallic particles. The Cr(VI) removal rate by ZVI rose significantly after the copper coating was applied. The copper loading needed for enhancing Cr(VI) removal was much higher than that needed for enhancing removal of chlorinated organic compounds or other oxidative contaminants, because of the higher oxidation potential of Cr(VI). The results of X-ray photoelectron spectroscopy (XPS) indicate that coating copper onto the surface of ZVI can not only increase the deepness of the oxidation film but also increase the oxidation state of iron in the film. This phenomenon means higher Cr(VI) removal capacity per unit weight of ZVI.

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KW - Copper-iron bimetallic particles

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KW - X-ray photoelectron spectroscopy (XPS)

KW - Zero-valent iron (ZVI)

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Hexavalent chromium removal from near natural water by copper-iron bimetallic particles

Abstract

Keywords

ASJC Scopus subject areas

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