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Article: Prolonged toxicity characteristic leaching procedure for nickel and copper aluminates

TitleProlonged toxicity characteristic leaching procedure for nickel and copper aluminates
Authors
Issue Date2011
PublisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/jem
Citation
Journal Of Environmental Monitoring, 2011, v. 13 n. 4, p. 829-835 How to Cite?
AbstractThe toxicity characteristic leaching procedure (TCLP) is a regulatory testing method widely employed to evaluate the environmental friendliness of waste materials. TCLP analysis provides a fast, easy and economical way to determine the mobility of waste pollutants under simulated landfill conditions. Recent studies on metal stabilization have reported the potential for nickel and copper aluminates to form in thermal treatment conditions, and suggested a more reliable method of stabilizing hazardous metals, particularly when products are to be reused. There is thus an urgent need for a convenient and effective method of quantifying metal leachability and identifying the metal leaching behavior of sparingly soluble materials. In this study, standard TCLP analysis was modified into a prolonged leaching experiment to investigate the leaching behavior of nickel and copper oxides (NiO and CuO) and their aluminates (NiAl2O4, CuAl2O4 and CuAlO 2). The results demonstrate the difficulty of differentiating the leachability of highly insoluble phases, such as NiO and NiAl2O 4, using the standard TCLP. The prolonged TCLP method, however, confirmed NiAl2O4 to have a lower degree of intrinsic leachability than NiO and that it could be expected to undergo congruent dissolution under landfill conditions. For the more soluble copper system, the aluminates were still found to possess a much lower degree of leachability, and their leaching behavior to follow an incongruent dissolution pattern. The results of this study prove prolonged TCLP analysis to be a convenient and effective way to evaluate the environmental friendliness of metal waste and to identify the leaching behavior of waste materials. © The Royal Society of Chemistry.
Persistent Identifierhttp://hdl.handle.net/10722/139049
ISSN
2014 Impact Factor: 2.179
ISI Accession Number ID
Funding AgencyGrant Number
Research Grants Council of Hong KongHKU 716310E
Funding Information:

We acknowledge the funding for this research provided by the General Research Fund Scheme of the Research Grants Council of Hong Kong (HKU 716310E). The authors are thankful to Professor Xiang-Dong Li for providing the ICP-AES analysis.

References
Grants

 

DC FieldValueLanguage
dc.contributor.authorShih, Ken_HK
dc.contributor.authorTang, Yen_HK
dc.date.accessioned2011-09-23T05:44:36Z-
dc.date.available2011-09-23T05:44:36Z-
dc.date.issued2011en_HK
dc.identifier.citationJournal Of Environmental Monitoring, 2011, v. 13 n. 4, p. 829-835en_HK
dc.identifier.issn1464-0325en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139049-
dc.description.abstractThe toxicity characteristic leaching procedure (TCLP) is a regulatory testing method widely employed to evaluate the environmental friendliness of waste materials. TCLP analysis provides a fast, easy and economical way to determine the mobility of waste pollutants under simulated landfill conditions. Recent studies on metal stabilization have reported the potential for nickel and copper aluminates to form in thermal treatment conditions, and suggested a more reliable method of stabilizing hazardous metals, particularly when products are to be reused. There is thus an urgent need for a convenient and effective method of quantifying metal leachability and identifying the metal leaching behavior of sparingly soluble materials. In this study, standard TCLP analysis was modified into a prolonged leaching experiment to investigate the leaching behavior of nickel and copper oxides (NiO and CuO) and their aluminates (NiAl2O4, CuAl2O4 and CuAlO 2). The results demonstrate the difficulty of differentiating the leachability of highly insoluble phases, such as NiO and NiAl2O 4, using the standard TCLP. The prolonged TCLP method, however, confirmed NiAl2O4 to have a lower degree of intrinsic leachability than NiO and that it could be expected to undergo congruent dissolution under landfill conditions. For the more soluble copper system, the aluminates were still found to possess a much lower degree of leachability, and their leaching behavior to follow an incongruent dissolution pattern. The results of this study prove prolonged TCLP analysis to be a convenient and effective way to evaluate the environmental friendliness of metal waste and to identify the leaching behavior of waste materials. © The Royal Society of Chemistry.en_HK
dc.languageengen_US
dc.publisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/jemen_HK
dc.relation.ispartofJournal of Environmental Monitoringen_HK
dc.subject.meshAluminum - chemistryen_HK
dc.subject.meshCopper - toxicityen_HK
dc.subject.meshEnvironmental Pollutants - toxicityen_HK
dc.subject.meshNickel - toxicityen_HK
dc.titleProlonged toxicity characteristic leaching procedure for nickel and copper aluminatesen_HK
dc.typeArticleen_HK
dc.identifier.emailShih, K:kshih@hkucc.hku.hken_HK
dc.identifier.authorityShih, K=rp00167en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1039/c0em00596gen_HK
dc.identifier.pmid21279218-
dc.identifier.scopuseid_2-s2.0-79953841356en_HK
dc.identifier.hkuros193075en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79953841356&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume13en_HK
dc.identifier.issue4en_HK
dc.identifier.spage829en_HK
dc.identifier.epage835en_HK
dc.identifier.isiWOS:000289172300007-
dc.publisher.placeUnited Kingdomen_HK
dc.relation.projectSpinel Formation in Recycling Sludge-Incineration Ash for Fabrication of Ceramic Materials-
dc.identifier.scopusauthoridShih, K=14072108900en_HK
dc.identifier.scopusauthoridTang, Y=36497711600en_HK

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