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Article: Nickel stabilization efficiency of aluminate and ferrite spinels and their leaching behavior

TitleNickel stabilization efficiency of aluminate and ferrite spinels and their leaching behavior
Authors
Issue Date2006
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/est
Citation
Environmental Science And Technology, 2006, v. 40 n. 17, p. 5520-5526 How to Cite?
AbstractStabilization efficiencies of spinel-based construction ceramics incorporating simulated nickel-laden waste sludge were evaluated and the leaching behavior of products investigated. To simulate the process of immobilization, nickel oxide was mixed alternatively with γ-alumina, kaolinite, and hematite. These tailoring precursors are commonly used to prepare construction ceramics in the building industry. After sintering from 600 to 1480 °C at 3 h, the nickel aluminate spinel (NiAl 2O 4) and the nickel ferrite spinel (NiFe 2O 4) crystallized with the ferrite spinel formation commencing about 200-300 °C lower than for the aluminate spinel. All the precursors showed high nickel incorporation efficiencies when sintered at temperatures greater than 1250 °C. Prolonged leach tests (up to 26 days) of product phases were carried out using a pH 2.9 acetic acid solution, and the spinel products were invariably superior to nickel oxide for immobilization over longer leaching periods. The leaching behavior of NiAl 2O 4 was consistent with congruent dissolution without significant reprecipitation, but for NiFe 2O 4, ferric hydroxide precipitation was evident. The major leaching reaction of sintered kaolinite-based products was the dissolution of cristobalite rather than NiAl 2O 4. This study demonstrated the feasibility of transforming nickel-laden sludge into spinel phases with the use of readily available and inexpensive ceramic raw materials, and the successful reduction of metal mobility under acidic environments. © 2006 American Chemical Society.
Persistent Identifierhttp://hdl.handle.net/10722/150372
ISSN
2015 Impact Factor: 5.393
2015 SCImago Journal Rankings: 2.664
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorShih, Ken_US
dc.contributor.authorWhite, Ten_US
dc.contributor.authorLeckie, JOen_US
dc.date.accessioned2012-06-26T06:03:57Z-
dc.date.available2012-06-26T06:03:57Z-
dc.date.issued2006en_US
dc.identifier.citationEnvironmental Science And Technology, 2006, v. 40 n. 17, p. 5520-5526en_US
dc.identifier.issn0013-936Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/150372-
dc.description.abstractStabilization efficiencies of spinel-based construction ceramics incorporating simulated nickel-laden waste sludge were evaluated and the leaching behavior of products investigated. To simulate the process of immobilization, nickel oxide was mixed alternatively with γ-alumina, kaolinite, and hematite. These tailoring precursors are commonly used to prepare construction ceramics in the building industry. After sintering from 600 to 1480 °C at 3 h, the nickel aluminate spinel (NiAl 2O 4) and the nickel ferrite spinel (NiFe 2O 4) crystallized with the ferrite spinel formation commencing about 200-300 °C lower than for the aluminate spinel. All the precursors showed high nickel incorporation efficiencies when sintered at temperatures greater than 1250 °C. Prolonged leach tests (up to 26 days) of product phases were carried out using a pH 2.9 acetic acid solution, and the spinel products were invariably superior to nickel oxide for immobilization over longer leaching periods. The leaching behavior of NiAl 2O 4 was consistent with congruent dissolution without significant reprecipitation, but for NiFe 2O 4, ferric hydroxide precipitation was evident. The major leaching reaction of sintered kaolinite-based products was the dissolution of cristobalite rather than NiAl 2O 4. This study demonstrated the feasibility of transforming nickel-laden sludge into spinel phases with the use of readily available and inexpensive ceramic raw materials, and the successful reduction of metal mobility under acidic environments. © 2006 American Chemical Society.en_US
dc.languageengen_US
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/esten_US
dc.relation.ispartofEnvironmental Science and Technologyen_US
dc.subject.meshAluminum - Chemistryen_US
dc.subject.meshFerric Compounds - Chemistryen_US
dc.subject.meshMicroscopy, Electron, Scanningen_US
dc.subject.meshNickel - Chemistryen_US
dc.subject.meshWater Pollutants, Chemicalen_US
dc.subject.meshX-Ray Diffractionen_US
dc.titleNickel stabilization efficiency of aluminate and ferrite spinels and their leaching behavioren_US
dc.typeArticleen_US
dc.identifier.emailShih, K:kshih@hkucc.hku.hken_US
dc.identifier.authorityShih, K=rp00167en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1021/es0601033en_US
dc.identifier.pmid16999134-
dc.identifier.scopuseid_2-s2.0-33748578380en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33748578380&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume40en_US
dc.identifier.issue17en_US
dc.identifier.spage5520en_US
dc.identifier.epage5526en_US
dc.identifier.isiWOS:000240130200058-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridShih, K=14072108900en_US
dc.identifier.scopusauthoridWhite, T=7402587158en_US
dc.identifier.scopusauthoridLeckie, JO=7006717360en_US

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