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Activation of persulfate by stability-enhanced magnetic graphene oxide for the removal of 2,4-dichlorophenol.
Sci Total Environ. 2020 Mar 10; 707:135656.ST

Abstract

A stability-enhanced magnetic catalyst, composed of α-Fe2O3@Fe3O4 shell-core magnetic nanoparticles and graphene oxide (MGO), was prepared and characterized by scanning electron micrope (SEM), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), and Brunauer-Emmett-Teller (BET). Catalyst synthesis was used to efficiently activate persulfate for the removal of 2,4-dichlorophenol (2,4-DCP). A magnetic nanoparticle:GO mass ratio of 5 (MGO-5) exhibited a better catalytic efficiency and could be effectively reused four times. The influences of the pollutant, catalyst, and oxidant concentrations were investigated, and the intrinsic relationships among these factors and the degradation kinetic constant were evaluated by a fitting method. It was found that the catalytic degradation process in the MGO-5-persulfate-2,4-DCP system was most likely dominated by an interfacial catalytic reaction, with an activation energy of 13.88 kJ/mol. Radical quenching experiments and electron paramagnetic resonance (EPR) analysis indicated that both sulfate radicals (SO4-) and hydroxyl radicals (OH) were responsible for 2,4-DCP removal, but surface-bounded SO4- played a greater role. Chloride ions at a concentration of 0-60 mg/L had no effect on 2,4-DCP removal. The proposed advanced oxidation technology has potential applications for the practical removal of aqueous organic pollutants.

Authors+Show Affiliations

College of Biology and Environmental Engineering, Changsha University, Changsha 410002, China.College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China. Electronic address: zhouyy@hunau.edu.cn.College of Biology and Environmental Engineering, Changsha University, Changsha 410002, China. Electronic address: luokun@ccsu.edu.cn.College of Biology and Environmental Engineering, Changsha University, Changsha 410002, China.College of Biology and Environmental Engineering, Changsha University, Changsha 410002, China.College of Biology and Environmental Engineering, Changsha University, Changsha 410002, China.College of Biology and Environmental Engineering, Changsha University, Changsha 410002, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31780151

Citation

Pang, Ya, et al. "Activation of Persulfate By Stability-enhanced Magnetic Graphene Oxide for the Removal of 2,4-dichlorophenol." The Science of the Total Environment, vol. 707, 2020, p. 135656.
Pang Y, Zhou Y, Luo K, et al. Activation of persulfate by stability-enhanced magnetic graphene oxide for the removal of 2,4-dichlorophenol. Sci Total Environ. 2020;707:135656.
Pang, Y., Zhou, Y., Luo, K., Zhang, Z., Yue, R., Li, X., & Lei, M. (2020). Activation of persulfate by stability-enhanced magnetic graphene oxide for the removal of 2,4-dichlorophenol. The Science of the Total Environment, 707, 135656. https://doi.org/10.1016/j.scitotenv.2019.135656
Pang Y, et al. Activation of Persulfate By Stability-enhanced Magnetic Graphene Oxide for the Removal of 2,4-dichlorophenol. Sci Total Environ. 2020 Mar 10;707:135656. PubMed PMID: 31780151.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Activation of persulfate by stability-enhanced magnetic graphene oxide for the removal of 2,4-dichlorophenol. AU - Pang,Ya, AU - Zhou,Yaoyu, AU - Luo,Kun, AU - Zhang,Zhu, AU - Yue,Ran, AU - Li,Xue, AU - Lei,Min, Y1 - 2019/11/20/ PY - 2019/09/07/received PY - 2019/11/04/revised PY - 2019/11/19/accepted PY - 2019/11/30/pubmed PY - 2019/11/30/medline PY - 2019/11/30/entrez KW - Advanced oxidation technology KW - Graphene oxide KW - Magnetic nanoparticles KW - Sulfate radical KW - Wastewater treatment SP - 135656 EP - 135656 JF - The Science of the total environment JO - Sci. Total Environ. VL - 707 N2 - A stability-enhanced magnetic catalyst, composed of α-Fe2O3@Fe3O4 shell-core magnetic nanoparticles and graphene oxide (MGO), was prepared and characterized by scanning electron micrope (SEM), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), and Brunauer-Emmett-Teller (BET). Catalyst synthesis was used to efficiently activate persulfate for the removal of 2,4-dichlorophenol (2,4-DCP). A magnetic nanoparticle:GO mass ratio of 5 (MGO-5) exhibited a better catalytic efficiency and could be effectively reused four times. The influences of the pollutant, catalyst, and oxidant concentrations were investigated, and the intrinsic relationships among these factors and the degradation kinetic constant were evaluated by a fitting method. It was found that the catalytic degradation process in the MGO-5-persulfate-2,4-DCP system was most likely dominated by an interfacial catalytic reaction, with an activation energy of 13.88 kJ/mol. Radical quenching experiments and electron paramagnetic resonance (EPR) analysis indicated that both sulfate radicals (SO4-) and hydroxyl radicals (OH) were responsible for 2,4-DCP removal, but surface-bounded SO4- played a greater role. Chloride ions at a concentration of 0-60 mg/L had no effect on 2,4-DCP removal. The proposed advanced oxidation technology has potential applications for the practical removal of aqueous organic pollutants. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/31780151/Activation_of_persulfate_by_stability_enhanced_magnetic_graphene_oxide_for_the_removal_of_24_dichlorophenol_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0048-9697(19)35651-7 DB - PRIME DP - Unbound Medicine ER -
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