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An efficient CuO-γFe2O3 composite activates persulfate for organic pollutants removal: Performance, advantages and mechanism.
Chemosphere. 2020 Mar; 242:125191.C

Abstract

CuO-γFe2O3 was fabricated as a novel and effective persulfate (PS) catalyst to remove bio-refractory organic pollutants. Characterization results showed that CuO-γFe2O3 possessed a relatively large surface area among transition metal oxides which provided favorable adsorption and activation sites for PS to degrade pollutants. There was an obvious synergy between CuO and γFe2O3 in the composite, which played 84.7% role in Acid orange 7 (AO7) removal. Under the optimal conditions (CuO-γFe2O3 dosage = 0.6 g L-1, PS dosage = 0.8 g L-1, unadjusted solution pH), almost complete AO7 was rapidly eliminated in 5 min. Moreover, the wide workable pH range (2-13), good stability (0.82 mg L-1 Cu leached, almost no Fe leached) and reusability (4 times) were the significant virtues of CuO-γFe2O3 for wastewater treatment. Besides, the reaction mechanism mainly based on the interaction among Cu(II/III) and Fe(II/III) species for sulfate radical (SO4-) generation was emphatically elucidated by the analyses of radicals, PS utilization, TOC removal and metal chemical states. Finally, CuO-γFe2O3+PS system displayed desirable removal of multiple organic pollutants with different molecular structures. In light of the prominent advantages of CuO-γFe2O3+PS, this work extended activated PS process in treating refractory organic wastewater.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Xian G
School of Environment & Natural Resource, Renmin University of China, Beijing, 100872, China; Department of Military Installations, Army Logistics University of PLA, Chongqing, 401311, China. Electronic address: lightxg@126.com.
Niu L
School of Environment & Natural Resource, Renmin University of China, Beijing, 100872, China. Electronic address: 1922992020@qq.com.
Zhang G
School of Environment & Natural Resource, Renmin University of China, Beijing, 100872, China. Electronic address: zgm@ruc.edu.cn.
Zhou N
Department of Military Installations, Army Logistics University of PLA, Chongqing, 401311, China. Electronic address: a86909304@163.com.
Long Z
School of Environment & Natural Resource, Renmin University of China, Beijing, 100872, China. Electronic address: longzq@ruc.edu.cn.
Zhi R
School of Environment & Natural Resource, Renmin University of China, Beijing, 100872, China. Electronic address: zhiran@ruc.edu.cn.

MeSH

AdsorptionAzo CompoundsBenzenesulfonatesCatalysisCopperEnvironmental PollutantsFerric CompoundsSulfatesWastewaterWater Pollutants, ChemicalWater Purification

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31675588

Citation

Xian, Guang, et al. "An Efficient CuO-γFe2O3 Composite Activates Persulfate for Organic Pollutants Removal: Performance, Advantages and Mechanism." Chemosphere, vol. 242, 2020, p. 125191.
Xian G, Niu L, Zhang G, et al. An efficient CuO-γFe2O3 composite activates persulfate for organic pollutants removal: Performance, advantages and mechanism. Chemosphere. 2020;242:125191.
Xian, G., Niu, L., Zhang, G., Zhou, N., Long, Z., & Zhi, R. (2020). An efficient CuO-γFe2O3 composite activates persulfate for organic pollutants removal: Performance, advantages and mechanism. Chemosphere, 242, 125191. https://doi.org/10.1016/j.chemosphere.2019.125191
Xian G, et al. An Efficient CuO-γFe2O3 Composite Activates Persulfate for Organic Pollutants Removal: Performance, Advantages and Mechanism. Chemosphere. 2020;242:125191. PubMed PMID: 31675588.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - An efficient CuO-γFe2O3 composite activates persulfate for organic pollutants removal: Performance, advantages and mechanism. AU - Xian,Guang, AU - Niu,Lijun, AU - Zhang,Guangming, AU - Zhou,Ningyu, AU - Long,Zeqing, AU - Zhi,Ran, Y1 - 2019/10/23/ PY - 2019/06/12/received PY - 2019/08/25/revised PY - 2019/10/21/accepted PY - 2019/11/2/pubmed PY - 2020/3/7/medline PY - 2019/11/2/entrez KW - CuO-γFe(2)O(3) KW - Mechanism KW - Organic pollutants KW - Persulfate KW - Removal SP - 125191 EP - 125191 JF - Chemosphere JO - Chemosphere VL - 242 N2 - CuO-γFe2O3 was fabricated as a novel and effective persulfate (PS) catalyst to remove bio-refractory organic pollutants. Characterization results showed that CuO-γFe2O3 possessed a relatively large surface area among transition metal oxides which provided favorable adsorption and activation sites for PS to degrade pollutants. There was an obvious synergy between CuO and γFe2O3 in the composite, which played 84.7% role in Acid orange 7 (AO7) removal. Under the optimal conditions (CuO-γFe2O3 dosage = 0.6 g L-1, PS dosage = 0.8 g L-1, unadjusted solution pH), almost complete AO7 was rapidly eliminated in 5 min. Moreover, the wide workable pH range (2-13), good stability (0.82 mg L-1 Cu leached, almost no Fe leached) and reusability (4 times) were the significant virtues of CuO-γFe2O3 for wastewater treatment. Besides, the reaction mechanism mainly based on the interaction among Cu(II/III) and Fe(II/III) species for sulfate radical (SO4-) generation was emphatically elucidated by the analyses of radicals, PS utilization, TOC removal and metal chemical states. Finally, CuO-γFe2O3+PS system displayed desirable removal of multiple organic pollutants with different molecular structures. In light of the prominent advantages of CuO-γFe2O3+PS, this work extended activated PS process in treating refractory organic wastewater. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/31675588/An_efficient_CuO_γFe2O3_composite_activates_persulfate_for_organic_pollutants_removal:_Performance_advantages_and_mechanism_ DB - PRIME DP - Unbound Medicine ER -