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Article: Surface coating with Ca(OH)2 for improvement of the transport of nanoscale zero-valent iron (nZVI) in porous media

TitleSurface coating with Ca(OH)2 for improvement of the transport of nanoscale zero-valent iron (nZVI) in porous media
Authors
Issue Date2013
PublisherIWA Publishing. The Journal's web site is located at http://www.iwaponline.com/wst/default.htm
Citation
Water Science and Technology, 2013, v. 68 n. 10, p. 2287-2293 How to Cite?
AbstractA novel thermal deposition method was developed to coat Ca(OH)2 on the surface of nanoscale zero-valent iron (nZVI). The nZVI particles with the Ca(OH)2 coating layer, nZVI/Ca(OH)2, had a clear core-shell structure based on the transmission electron microscopy observations, and the Ca(OH)2 shell was identified as an amorphous phase. The Ca(OH)2 coating shell would not only function as an effective protection layer for nZVI but also improve the mobility of nZVI in porous media for its use in environmental decontamination. A 10% Ca/Fe mass ratio was found to result in a proper thickness of the Ca(OH)2 shell on the nZVI surface. Based on the filtration tests in sand columns, the Ca(OH)2-based surface coating could greatly improve the mobility and transport of nZVI particles in porous media. In addition, batch experiments were conducted to evaluate the reactivity of Ca(OH)2-coated nZVI particles for the reduction of Cr(VI) and its removal from water.
Persistent Identifierhttp://hdl.handle.net/10722/202683
ISSN
2015 Impact Factor: 1.064
2015 SCImago Journal Rankings: 0.469
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWei, CJen_US
dc.contributor.authorLi, XYen_US
dc.date.accessioned2014-09-19T09:14:16Z-
dc.date.available2014-09-19T09:14:16Z-
dc.date.issued2013en_US
dc.identifier.citationWater Science and Technology, 2013, v. 68 n. 10, p. 2287-2293en_US
dc.identifier.issn0273-1223-
dc.identifier.urihttp://hdl.handle.net/10722/202683-
dc.description.abstractA novel thermal deposition method was developed to coat Ca(OH)2 on the surface of nanoscale zero-valent iron (nZVI). The nZVI particles with the Ca(OH)2 coating layer, nZVI/Ca(OH)2, had a clear core-shell structure based on the transmission electron microscopy observations, and the Ca(OH)2 shell was identified as an amorphous phase. The Ca(OH)2 coating shell would not only function as an effective protection layer for nZVI but also improve the mobility of nZVI in porous media for its use in environmental decontamination. A 10% Ca/Fe mass ratio was found to result in a proper thickness of the Ca(OH)2 shell on the nZVI surface. Based on the filtration tests in sand columns, the Ca(OH)2-based surface coating could greatly improve the mobility and transport of nZVI particles in porous media. In addition, batch experiments were conducted to evaluate the reactivity of Ca(OH)2-coated nZVI particles for the reduction of Cr(VI) and its removal from water.-
dc.languageengen_US
dc.publisherIWA Publishing. The Journal's web site is located at http://www.iwaponline.com/wst/default.htm-
dc.relation.ispartofWater Science and Technologyen_US
dc.rightsWater Science and Technology. Copyright © IWA Publishing.-
dc.rights©IWA Publishing 2013. The definitive peer-reviewed and edited version of this article is published in Water Science and Technology, 2013, v. 68 n. 10, p. 2287-2293 ; doi: 10.2166/wst.2013.494 and is available at www.iwapublishing.com-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subject.meshCalcium Hydroxide - chemistry-
dc.subject.meshIron - chemistry-
dc.subject.meshMetal Nanoparticles - chemistry-
dc.subject.meshPorosity-
dc.titleSurface coating with Ca(OH)2 for improvement of the transport of nanoscale zero-valent iron (nZVI) in porous mediaen_US
dc.typeArticleen_US
dc.identifier.emailLi, XY: xlia@hkucc.hku.hken_US
dc.identifier.authorityLi, XY=rp00222en_US
dc.description.naturepostprint-
dc.identifier.doi10.2166/wst.2013.494-
dc.identifier.pmid24292480-
dc.identifier.hkuros236410en_US
dc.identifier.volume68en_US
dc.identifier.issue10en_US
dc.identifier.spage2287en_US
dc.identifier.epage2293en_US
dc.identifier.isiWOS:000330122400025-
dc.publisher.placeUnited Kingdom-

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