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- Publisher Website: 10.1016/j.cej.2019.123558
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Article: Insight into Flower-Like Greigite-Based Peroxydisulfate Activation for Effective Bisphenol a Abatement: Performance and Electron Transfer Mechanism
Title | Insight into Flower-Like Greigite-Based Peroxydisulfate Activation for Effective Bisphenol a Abatement: Performance and Electron Transfer Mechanism |
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Authors | |
Keywords | Peroxydisulfate Flower-like greigite Bisphenol A Effective degradation Electron transfer |
Issue Date | 2020 |
Publisher | Elsevier 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? |
Abstract | This 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 Identifier | http://hdl.handle.net/10722/291161 |
ISSN | 2023 Impact Factor: 13.3 2023 SCImago Journal Rankings: 2.852 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Lin, X | - |
dc.contributor.author | Shih, K | - |
dc.contributor.author | Chen, J | - |
dc.contributor.author | Xie, X | - |
dc.contributor.author | Zhang, Y | - |
dc.contributor.author | Chen, Y | - |
dc.contributor.author | Chen, Z | - |
dc.contributor.author | Li, Y | - |
dc.date.accessioned | 2020-11-07T13:53:03Z | - |
dc.date.available | 2020-11-07T13:53:03Z | - |
dc.date.issued | 2020 | - |
dc.identifier.citation | Chemical Engineering Journal, 2020, v. 391, p. article no. 123558 | - |
dc.identifier.issn | 1385-8947 | - |
dc.identifier.uri | http://hdl.handle.net/10722/291161 | - |
dc.description.abstract | This 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.language | eng | - |
dc.publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/cej | - |
dc.relation.ispartof | Chemical Engineering Journal | - |
dc.subject | Peroxydisulfate | - |
dc.subject | Flower-like greigite | - |
dc.subject | Bisphenol A | - |
dc.subject | Effective degradation | - |
dc.subject | Electron transfer | - |
dc.title | Insight into Flower-Like Greigite-Based Peroxydisulfate Activation for Effective Bisphenol a Abatement: Performance and Electron Transfer Mechanism | - |
dc.type | Article | - |
dc.identifier.email | Shih, K: kshih@hku.hk | - |
dc.identifier.authority | Shih, K=rp00167 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.cej.2019.123558 | - |
dc.identifier.scopus | eid_2-s2.0-85075852025 | - |
dc.identifier.hkuros | 318650 | - |
dc.identifier.volume | 391 | - |
dc.identifier.spage | article no. 123558 | - |
dc.identifier.epage | article no. 123558 | - |
dc.identifier.isi | WOS:000545945100063 | - |
dc.publisher.place | Netherlands | - |
dc.identifier.issnl | 1385-8947 | - |