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The mechanism of degradation of bisphenol A using the magnetically separable CuFe2O4/peroxymonosulfate heterogeneous oxidation process.
J Hazard Mater. 2016 May 15; 309:87-96.JH

Abstract

The removal of bisphenol A (BPA) in aqueous solution by an oxidation process involving peroxymonosulfate (PMS) activated by CuFe2O4 magnetic nanoparticles (MNPs) is reported herein. The effects of PMS concentration, CuFe2O4 dosage, initial pH, initial BPA concentration, catalyst addition mode, and anions (Cl(-), F(-), ClO4(-) and H2PO4(-)) on BPA degradation were investigated. Results indicate that nearly complete removal of BPA (50 mg/L) within 60 min and 84.0% TOC removal in 120 min could be achieved at neutral pH by using 0.6 g/L CuFe2O4 MNPs and 0.3 g/L PMS. The generation of reactive radicals (mainly hydroxyl radicals) was confirmed using electron paramagnetic resonance (EPR). Possible mechanisms on the radical generation from CuFe2O4/PMS system are proposed based on the results of radical identification tests and XPS analysis. The lack of inhibition of the reaction by free radical scavengers such as methanol and tert-butyl alcohol suggests that these species may not be generated in the bulk solution, and methylene blue probe experiments confirm that this process does not involve free radical generation. Surface-bound, rather than free radicals generated by a surface catalyzed-redox cycle involving both Fe(III) and Cu(II), are postulated to be responsible for the mineralization of bisphenol A.

Authors+Show Affiliations

Department of Environmental Engineering, Wuhan University, Wuhan 430079, China; Shenzhen Research Institute of Wuhan University, Shenzhen 518057, China.Department of Environmental Engineering, Wuhan University, Wuhan 430079, China; Shenzhen Research Institute of Wuhan University, Shenzhen 518057, China.Department of Environmental Engineering, Wuhan University, Wuhan 430079, China; Shenzhen Research Institute of Wuhan University, Shenzhen 518057, China. Electronic address: eeng@whu.edu.cn.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26875144

Citation

Xu, Yin, et al. "The Mechanism of Degradation of Bisphenol a Using the Magnetically Separable CuFe2O4/peroxymonosulfate Heterogeneous Oxidation Process." Journal of Hazardous Materials, vol. 309, 2016, pp. 87-96.
Xu Y, Ai J, Zhang H. The mechanism of degradation of bisphenol A using the magnetically separable CuFe2O4/peroxymonosulfate heterogeneous oxidation process. J Hazard Mater. 2016;309:87-96.
Xu, Y., Ai, J., & Zhang, H. (2016). The mechanism of degradation of bisphenol A using the magnetically separable CuFe2O4/peroxymonosulfate heterogeneous oxidation process. Journal of Hazardous Materials, 309, 87-96. https://doi.org/10.1016/j.jhazmat.2016.01.023
Xu Y, Ai J, Zhang H. The Mechanism of Degradation of Bisphenol a Using the Magnetically Separable CuFe2O4/peroxymonosulfate Heterogeneous Oxidation Process. J Hazard Mater. 2016 May 15;309:87-96. PubMed PMID: 26875144.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The mechanism of degradation of bisphenol A using the magnetically separable CuFe2O4/peroxymonosulfate heterogeneous oxidation process. AU - Xu,Yin, AU - Ai,Jia, AU - Zhang,Hui, Y1 - 2016/01/13/ PY - 2015/08/12/received PY - 2015/12/02/revised PY - 2016/01/10/accepted PY - 2016/2/15/entrez PY - 2016/2/15/pubmed PY - 2016/2/15/medline KW - CuFe(2)O(4) KW - Heterogeneous catalysis KW - Mechanism KW - Mineralization KW - Peroxymonosulfate SP - 87 EP - 96 JF - Journal of hazardous materials JO - J Hazard Mater VL - 309 N2 - The removal of bisphenol A (BPA) in aqueous solution by an oxidation process involving peroxymonosulfate (PMS) activated by CuFe2O4 magnetic nanoparticles (MNPs) is reported herein. The effects of PMS concentration, CuFe2O4 dosage, initial pH, initial BPA concentration, catalyst addition mode, and anions (Cl(-), F(-), ClO4(-) and H2PO4(-)) on BPA degradation were investigated. Results indicate that nearly complete removal of BPA (50 mg/L) within 60 min and 84.0% TOC removal in 120 min could be achieved at neutral pH by using 0.6 g/L CuFe2O4 MNPs and 0.3 g/L PMS. The generation of reactive radicals (mainly hydroxyl radicals) was confirmed using electron paramagnetic resonance (EPR). Possible mechanisms on the radical generation from CuFe2O4/PMS system are proposed based on the results of radical identification tests and XPS analysis. The lack of inhibition of the reaction by free radical scavengers such as methanol and tert-butyl alcohol suggests that these species may not be generated in the bulk solution, and methylene blue probe experiments confirm that this process does not involve free radical generation. Surface-bound, rather than free radicals generated by a surface catalyzed-redox cycle involving both Fe(III) and Cu(II), are postulated to be responsible for the mineralization of bisphenol A. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/26875144/The_mechanism_of_degradation_of_bisphenol_A_using_the_magnetically_separable_CuFe2O4/peroxymonosulfate_heterogeneous_oxidation_process_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(16)30023-1 DB - PRIME DP - Unbound Medicine ER -
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