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Article: Insight into Flower-Like Greigite-Based Peroxydisulfate Activation for Effective Bisphenol a Abatement: Performance and Electron Transfer Mechanism

TitleInsight into Flower-Like Greigite-Based Peroxydisulfate Activation for Effective Bisphenol a Abatement: Performance and Electron Transfer Mechanism
Authors
KeywordsPeroxydisulfate
Flower-like greigite
Bisphenol A
Effective degradation
Electron transfer
Issue Date2020
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/cej
Citation
Chemical Engineering Journal, 2020, v. 391, p. article no. 123558 How to Cite?
AbstractThis research offers insight into the activation of peroxydisulfate (PDS) by flower-like greigite (Fe3S4) (FLG) for bisphenol A (BPA) degradation in water. The as-prepared greigite was exclusively effective as a PDS activator in producing free radicals. FLG/PDS performed much better than Fe3O4/PDS and ZVI/PDS systems or some other earlier systems for BPA degradation. Only 0.02 g/L of FLG could remove more than 95% of BPA in 120 min. Cl− had little adverse impact on the BPA abatement, and 20 mg/L of NaHCO3 could decrease the BPA degradation rate to only 40%. FLG could be easily recycled by magnetic force, and it was reusable. Electron paramagnetic resonance and free radical scavenging tests demonstrated that sulfate radicals play a main role in the BPA degradation process. GC–MS and UHPLC-Q-TOF-MS were applied to detect the intermediates and the possible BPA degradation mechanism; three main pathways were proposed. The structure of nanosheets could effectively enhance the interaction between greigite and PDS and furthermore effectively produce radicals for BPA degradation. X-ray photoelectron experiments showed that the rate of Fe2+ decreased from approximately 37.0% to 19.5% and that typical peaks of S2− disappeared after PDS activation. This discovery indicated that S2− lost electrons to accelerate Fe2+/Fe3+ recycling when the Fe2+ species was changed to Fe3+. This research offered good insights into the Fe2+/Fe3+ species with sulfur elements effectively activating PDS for BPA degradation. Our study deepened the understanding of the electron transfer mechanism of sulfur-iron-based heterogeneous catalysis in environmental remediation.
Persistent Identifierhttp://hdl.handle.net/10722/291161
ISSN
2020 Impact Factor: 13.273
2015 SCImago Journal Rankings: 1.743
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLin, X-
dc.contributor.authorShih, K-
dc.contributor.authorChen, J-
dc.contributor.authorXie, X-
dc.contributor.authorZhang, Y-
dc.contributor.authorChen, Y-
dc.contributor.authorChen, Z-
dc.contributor.authorLi, Y-
dc.date.accessioned2020-11-07T13:53:03Z-
dc.date.available2020-11-07T13:53:03Z-
dc.date.issued2020-
dc.identifier.citationChemical Engineering Journal, 2020, v. 391, p. article no. 123558-
dc.identifier.issn1385-8947-
dc.identifier.urihttp://hdl.handle.net/10722/291161-
dc.description.abstractThis research offers insight into the activation of peroxydisulfate (PDS) by flower-like greigite (Fe3S4) (FLG) for bisphenol A (BPA) degradation in water. The as-prepared greigite was exclusively effective as a PDS activator in producing free radicals. FLG/PDS performed much better than Fe3O4/PDS and ZVI/PDS systems or some other earlier systems for BPA degradation. Only 0.02 g/L of FLG could remove more than 95% of BPA in 120 min. Cl− had little adverse impact on the BPA abatement, and 20 mg/L of NaHCO3 could decrease the BPA degradation rate to only 40%. FLG could be easily recycled by magnetic force, and it was reusable. Electron paramagnetic resonance and free radical scavenging tests demonstrated that sulfate radicals play a main role in the BPA degradation process. GC–MS and UHPLC-Q-TOF-MS were applied to detect the intermediates and the possible BPA degradation mechanism; three main pathways were proposed. The structure of nanosheets could effectively enhance the interaction between greigite and PDS and furthermore effectively produce radicals for BPA degradation. X-ray photoelectron experiments showed that the rate of Fe2+ decreased from approximately 37.0% to 19.5% and that typical peaks of S2− disappeared after PDS activation. This discovery indicated that S2− lost electrons to accelerate Fe2+/Fe3+ recycling when the Fe2+ species was changed to Fe3+. This research offered good insights into the Fe2+/Fe3+ species with sulfur elements effectively activating PDS for BPA degradation. Our study deepened the understanding of the electron transfer mechanism of sulfur-iron-based heterogeneous catalysis in environmental remediation.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/cej-
dc.relation.ispartofChemical Engineering Journal-
dc.subjectPeroxydisulfate-
dc.subjectFlower-like greigite-
dc.subjectBisphenol A-
dc.subjectEffective degradation-
dc.subjectElectron transfer-
dc.titleInsight into Flower-Like Greigite-Based Peroxydisulfate Activation for Effective Bisphenol a Abatement: Performance and Electron Transfer Mechanism-
dc.typeArticle-
dc.identifier.emailShih, K: kshih@hku.hk-
dc.identifier.authorityShih, K=rp00167-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.cej.2019.123558-
dc.identifier.scopuseid_2-s2.0-85075852025-
dc.identifier.hkuros318650-
dc.identifier.volume391-
dc.identifier.spagearticle no. 123558-
dc.identifier.epagearticle no. 123558-
dc.identifier.isiWOS:000545945100063-
dc.publisher.placeNetherlands-
dc.identifier.issnl1385-8947-

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