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Article: Copper aluminate spinel in the stabilization and detoxification of simulated copper-laden sludge

TitleCopper aluminate spinel in the stabilization and detoxification of simulated copper-laden sludge
Authors
KeywordsCeramic
Copper
Detoxification
Sludge
Spinel
Stabilization
Issue Date2010
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/chemosphere
Citation
Chemosphere, 2010, v. 80 n. 4, p. 375-380 How to Cite?
AbstractThis study aims to evaluate the feasibility of stabilizing copper-laden sludge by the application of alumina-based ceramic products. The processing temperature, material leaching behaviour, and the effect of detoxification were investigated in detail. CuO was used to simulate the copper-laden sludge and X-ray Diffraction was performed to monitor the incorporation of copper into the copper aluminate spinel (CuAl2O4) phase in ceramic products. It was found that the development of CuAl2O4 increased with elevating temperatures up to and including 1000°C in the 3h short-sintering scheme. When the sintering temperature went above 1000°C, the CuAl2O4 phase began to decompose due to the high temperature transformation to CuAlO2. The leachability and leaching behaviour of CuO and CuAl2O4 were compared by usage of a prolonged leaching test modified from US EPA's toxicity characteristic leaching procedure. The leaching results show that CuAl2O4 is superior to CuO for the purpose of copper immobilization over longer leaching periods. Furthermore, the detoxification effect of CuAl2O4 was tested through bacterial adhesion with Escherichia coli K12, and the comparison of bacterial adhesion on CuO and CuAl2O4 surfaces shows the beneficial detoxification effect in connection with the formation of the CuAl2O4 spinel. This study demonstrates the feasibility of transforming copper-laden sludge into the spinel phase by using readily available and inexpensive ceramic materials, and achieving a successful reduction of metal mobility and toxicity. © 2010 Elsevier Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/129127
ISSN
2015 Impact Factor: 3.698
2015 SCImago Journal Rankings: 1.536
ISI Accession Number ID
Funding AgencyGrant Number
University of Hong Kong
Funding Information:

We acknowledge the funding for this research provided by the University of Hong Kong from its Research Seed Fund. The authors are thankful to Professor Xiang-Dong Li for providing the ICP-AES analysis. Dr. Tong Zhang, Mr. Yuanqing Chao and Ms. Vicky Fung are thanked for assisting with the AFM technique and bacterial adhesion experiment.

References

 

DC FieldValueLanguage
dc.contributor.authorTang, Yen_HK
dc.contributor.authorShih, Ken_HK
dc.contributor.authorChan, Ken_HK
dc.date.accessioned2010-12-23T08:32:52Z-
dc.date.available2010-12-23T08:32:52Z-
dc.date.issued2010en_HK
dc.identifier.citationChemosphere, 2010, v. 80 n. 4, p. 375-380en_HK
dc.identifier.issn0045-6535en_HK
dc.identifier.urihttp://hdl.handle.net/10722/129127-
dc.description.abstractThis study aims to evaluate the feasibility of stabilizing copper-laden sludge by the application of alumina-based ceramic products. The processing temperature, material leaching behaviour, and the effect of detoxification were investigated in detail. CuO was used to simulate the copper-laden sludge and X-ray Diffraction was performed to monitor the incorporation of copper into the copper aluminate spinel (CuAl2O4) phase in ceramic products. It was found that the development of CuAl2O4 increased with elevating temperatures up to and including 1000°C in the 3h short-sintering scheme. When the sintering temperature went above 1000°C, the CuAl2O4 phase began to decompose due to the high temperature transformation to CuAlO2. The leachability and leaching behaviour of CuO and CuAl2O4 were compared by usage of a prolonged leaching test modified from US EPA's toxicity characteristic leaching procedure. The leaching results show that CuAl2O4 is superior to CuO for the purpose of copper immobilization over longer leaching periods. Furthermore, the detoxification effect of CuAl2O4 was tested through bacterial adhesion with Escherichia coli K12, and the comparison of bacterial adhesion on CuO and CuAl2O4 surfaces shows the beneficial detoxification effect in connection with the formation of the CuAl2O4 spinel. This study demonstrates the feasibility of transforming copper-laden sludge into the spinel phase by using readily available and inexpensive ceramic materials, and achieving a successful reduction of metal mobility and toxicity. © 2010 Elsevier Ltd.en_HK
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/chemosphereen_HK
dc.relation.ispartofChemosphereen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectCeramicen_HK
dc.subjectCopperen_HK
dc.subjectDetoxificationen_HK
dc.subjectSludgeen_HK
dc.subjectSpinelen_HK
dc.subjectStabilizationen_HK
dc.titleCopper aluminate spinel in the stabilization and detoxification of simulated copper-laden sludgeen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0045-6535&volume=80&issue=4&spage=375&epage=380&date=2010&atitle=Copper+aluminate+spinel+in+the+stabilization+and+detoxification+of+simulated+copper-laden+sludge-
dc.identifier.emailShih, K:kshih@hkucc.hku.hken_HK
dc.identifier.authorityShih, K=rp00167en_HK
dc.description.naturepostprint-
dc.identifier.doi10.1016/j.chemosphere.2010.04.048en_HK
dc.identifier.pmid20478609-
dc.identifier.scopuseid_2-s2.0-77953616189en_HK
dc.identifier.hkuros178462en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-77953616189&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume80en_HK
dc.identifier.issue4en_HK
dc.identifier.spage375en_HK
dc.identifier.epage380en_HK
dc.identifier.isiWOS:000279447400003-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridTang, Y=36497711600en_HK
dc.identifier.scopusauthoridShih, K=14072108900en_HK
dc.identifier.scopusauthoridChan, K=25721683600en_HK
dc.identifier.citeulike7267265-

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