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Article: Abiotic oxidation of Mn(II) and its effect on the oxidation of As(III) in the presence of nano-hematite

TitleAbiotic oxidation of Mn(II) and its effect on the oxidation of As(III) in the presence of nano-hematite
Authors
KeywordsAbiotic oxidation
Arsenate
Arsenite
Mn
Mobility
Issue Date2012
PublisherSpringer New York LLC. The Journal's web site is located at http://springerlink.metapress.com/openurl.asp?genre=journal&issn=0963-9292
Citation
Ecotoxicology, 2012, v. 21 n. 6, p. 1753-1760 How to Cite?
AbstractManganese (hydr)oxides (MnO x) is a powerful oxidant in the oxidation of As(III) in natural environment. Under some circumstances, Mn(II) can be oxidized to MnO x which in turn accelerates the oxidation of As(III). However, to the best of our knowledge, little is known regarding how Mn(II) affects the oxidation of both the dissolved and the adsorbed As(III) in aquatic environments. In this study, effects of abiotic oxidation of Mn(II) on the oxidation of As(III) were investigated. Kinetic results as well as TEM and XRD analyses confirmed the formation of amorphous MnO x after sorption of Mn(II) on hematite nano-particles under oxic conditions. Mn(II) was oxidized to Mn(III) and then to Mn(IV), and this process was dependent upon pH and Mn(II) concentrations. The newly formed MnO x played an important role in the further oxidation of the dissolved and the adsorbed As(III) on hematite, and the oxidation rate of As(III) increased with the rising Mn(II) concentrations. As the adsorbed As(III) was oxidized to As(V), a fraction of As(V) was released into the solution, which increased the mobility of As. The present study reveals that abiotic oxidation of Mn(II) affects the oxidation of As(III) in aquatic environment. © Springer Science+Business Media, LLC 2012.
Persistent Identifierhttp://hdl.handle.net/10722/159501
ISSN
2015 Impact Factor: 2.329
2015 SCImago Journal Rankings: 1.108
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHan, Xen_HK
dc.contributor.authorLi, YLen_HK
dc.contributor.authorGu, JDen_HK
dc.date.accessioned2012-08-16T05:51:07Z-
dc.date.available2012-08-16T05:51:07Z-
dc.date.issued2012en_HK
dc.identifier.citationEcotoxicology, 2012, v. 21 n. 6, p. 1753-1760en_HK
dc.identifier.issn0963-9292en_HK
dc.identifier.urihttp://hdl.handle.net/10722/159501-
dc.description.abstractManganese (hydr)oxides (MnO x) is a powerful oxidant in the oxidation of As(III) in natural environment. Under some circumstances, Mn(II) can be oxidized to MnO x which in turn accelerates the oxidation of As(III). However, to the best of our knowledge, little is known regarding how Mn(II) affects the oxidation of both the dissolved and the adsorbed As(III) in aquatic environments. In this study, effects of abiotic oxidation of Mn(II) on the oxidation of As(III) were investigated. Kinetic results as well as TEM and XRD analyses confirmed the formation of amorphous MnO x after sorption of Mn(II) on hematite nano-particles under oxic conditions. Mn(II) was oxidized to Mn(III) and then to Mn(IV), and this process was dependent upon pH and Mn(II) concentrations. The newly formed MnO x played an important role in the further oxidation of the dissolved and the adsorbed As(III) on hematite, and the oxidation rate of As(III) increased with the rising Mn(II) concentrations. As the adsorbed As(III) was oxidized to As(V), a fraction of As(V) was released into the solution, which increased the mobility of As. The present study reveals that abiotic oxidation of Mn(II) affects the oxidation of As(III) in aquatic environment. © Springer Science+Business Media, LLC 2012.en_HK
dc.languageengen_US
dc.publisherSpringer New York LLC. The Journal's web site is located at http://springerlink.metapress.com/openurl.asp?genre=journal&issn=0963-9292en_HK
dc.relation.ispartofEcotoxicologyen_HK
dc.rightsThe original publication is available at www.springerlink.com-
dc.subjectAbiotic oxidationen_HK
dc.subjectArsenateen_HK
dc.subjectArseniteen_HK
dc.subjectMnen_HK
dc.subjectMobilityen_HK
dc.titleAbiotic oxidation of Mn(II) and its effect on the oxidation of As(III) in the presence of nano-hematiteen_HK
dc.typeArticleen_HK
dc.identifier.emailGu, JD: jdgu@hkucc.hku.hken_HK
dc.identifier.authorityGu, JD=rp00701en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s10646-012-0950-zen_HK
dc.identifier.pmid22688359-
dc.identifier.scopuseid_2-s2.0-84864886650en_HK
dc.identifier.hkuros204526en_US
dc.identifier.hkuros224958-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84864886650&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume21en_HK
dc.identifier.issue6en_HK
dc.identifier.spage1753en_HK
dc.identifier.epage1760en_HK
dc.identifier.eissn1573-3017-
dc.identifier.isiWOS:000306592100020-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridHan, X=37110924600en_HK
dc.identifier.scopusauthoridLi, YL=36013101300en_HK
dc.identifier.scopusauthoridGu, JD=7403129601en_HK
dc.identifier.citeulike10796963-

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