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Article: Oxidative decomposition of perfluorooctanesulfonate in water by permanganate

TitleOxidative decomposition of perfluorooctanesulfonate in water by permanganate
Authors
KeywordsAcidic conditions
Acidic solutions
Batch experiments
Decomposition efficiency
Decomposition rate
Issue Date2012
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/seppur
Citation
Separation and Purification Technology, 2012, v. 87, p. 95-100 How to Cite?
AbstractExperiments were conducted to examine the oxidative decomposition of perfluorooctanesulfonate (PFOS), a widely distributed and highly resistant emerging organic pollutant, by permanganate in aqueous solutions. At 65°C and pH 4.2, 46.8% of the PFOS was decomposed by permanganate, with a F - yield of 5.3% and a SO42- yield of 36.9%. The effects of temperature, initial permanganate concentration, and pH on PFOS decomposition efficiency were systematically investigated with batch experiments. Increasing the temperature and initial permanganate concentration effectively accelerated the rate of PFOS decomposition. However, increased pH decreased the PFOS decomposition rate, therefore indicating that a more acidic solution favors the decomposition of PFOS by permanganate. Moreover, the autocatalysis effect was found to accelerate the rate of PFOS decomposition by the in situ formed MnO 2 from the reduction of permanganate and, thus, the addition of MnO 2 to the reaction solution also increased the decomposition rate. Under acidic conditions, the addition of organic acids can enhance their complexation with Mn(V) and Mn(VI). Therefore, the duration of the Mn(VII) reduction intermediates, which are highly active and easily disproportionated and autodecomposed, can be further prolonged to facilitate the oxidative decomposition of PFOS. © 2011 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/150654
ISSN
2015 Impact Factor: 3.299
2015 SCImago Journal Rankings: 1.100
ISI Accession Number ID
Funding AgencyGrant Number
Research Grants Council of Hong KongHKU 716809E
National Natural Science Foundation of China40801086
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 716809E) and the National Natural Science Foundation of China (40801086). The authors are thankful to Ms. Vicky Fung, Dr. Bing Li, and Mr. Ke Yu for assisting with the UPLC/MS/MS analysis.

References
Grants

 

DC FieldValueLanguage
dc.contributor.authorLiu, Cen_US
dc.contributor.authorShih, Ken_US
dc.contributor.authorWang, Fen_US
dc.date.accessioned2012-06-26T06:06:29Z-
dc.date.available2012-06-26T06:06:29Z-
dc.date.issued2012en_US
dc.identifier.citationSeparation and Purification Technology, 2012, v. 87, p. 95-100en_US
dc.identifier.issn1383-5866en_US
dc.identifier.urihttp://hdl.handle.net/10722/150654-
dc.description.abstractExperiments were conducted to examine the oxidative decomposition of perfluorooctanesulfonate (PFOS), a widely distributed and highly resistant emerging organic pollutant, by permanganate in aqueous solutions. At 65°C and pH 4.2, 46.8% of the PFOS was decomposed by permanganate, with a F - yield of 5.3% and a SO42- yield of 36.9%. The effects of temperature, initial permanganate concentration, and pH on PFOS decomposition efficiency were systematically investigated with batch experiments. Increasing the temperature and initial permanganate concentration effectively accelerated the rate of PFOS decomposition. However, increased pH decreased the PFOS decomposition rate, therefore indicating that a more acidic solution favors the decomposition of PFOS by permanganate. Moreover, the autocatalysis effect was found to accelerate the rate of PFOS decomposition by the in situ formed MnO 2 from the reduction of permanganate and, thus, the addition of MnO 2 to the reaction solution also increased the decomposition rate. Under acidic conditions, the addition of organic acids can enhance their complexation with Mn(V) and Mn(VI). Therefore, the duration of the Mn(VII) reduction intermediates, which are highly active and easily disproportionated and autodecomposed, can be further prolonged to facilitate the oxidative decomposition of PFOS. © 2011 Elsevier B.V. All rights reserved.en_US
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/seppuren_US
dc.relation.ispartofSeparation and Purification Technologyen_US
dc.subjectAcidic conditionsen_US
dc.subjectAcidic solutionsen_US
dc.subjectBatch experimentsen_US
dc.subjectDecomposition efficiencyen_US
dc.subjectDecomposition rateen_US
dc.titleOxidative decomposition of perfluorooctanesulfonate in water by permanganateen_US
dc.typeArticleen_US
dc.identifier.emailLiu, C: cecsliu@hku.hken_US
dc.identifier.emailShih, K: kshih@hku.hk-
dc.identifier.authorityShih, K=rp00167en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.seppur.2011.11.027en_US
dc.identifier.scopuseid_2-s2.0-84857035998en_US
dc.identifier.hkuros205532-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84857035998&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume87en_US
dc.identifier.spage95en_US
dc.identifier.epage100en_US
dc.identifier.isiWOS:000302204300012-
dc.publisher.placeUnited Kingdomen_US
dc.relation.projectSorption of Perfluorochemicals on Sediments and Sludge of Hong Kong-
dc.identifier.scopusauthoridWang, F=53364861600en_US
dc.identifier.scopusauthoridShih, K=14072108900en_US
dc.identifier.scopusauthoridLiu, CS=48861430400en_US
dc.identifier.citeulike10109678-

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