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Mo0 and Mo4+ bimetallic reactive sites accelerating Fe2+/Fe3+ cycling for the activation of peroxymonosulfate with significantly improved remediation of aromatic pollutants.
Chemosphere. 2020 Apr; 244:125539.C

Abstract

In Fe2+/peroxymonosulfate (PMS) activation system, the slow cycle rate of Fe3+/Fe2+ has been considered to be the limiting step in the remediation of organic contaminants. In this paper, commercial molybdenum (Mo) powder is employed as the cocatalyst in Fe2+/PMS system, which can significantly accelerate the Fe3+/Fe2+ cycling efficiency by the exposed bimetallic active sites of Mo4+ and Mo0, and the process is accelerated as the amount of Mo powder increased. The Mo cocatalytic Fe2+/PMS system exhibits an enhanced performance for the activation of PMS and the removal of different aromatic pollutants including dyes, phenolic pollutants and antibiotics, in a wide pH range of 4.0-9.0. Importantly, Mo powder exhibits excellent cycle performance in the PMS activation system, and rhodamine B (RhB) can be removed within 10 min even after 5 cycles. Electron paramagnetic resonance (EPR) prove that the sulfate radicals (SO4-) is the major reactive oxides species in the PMS activation, the increase of Fe2+ content induced by the cocatalytic effect of Mo powder can effectively promote the production of SO4- and increase the utilization of PMS. In addition, to observe the process of pollutant removal more intuitively, HPLC-MS is used to analyze the decomposing pathway of RhB and sulfadiazine in Mo+FeSO4+PMS system. It is believed that this research provides a new idea for the efficient activation of PMS by iron ions in a wide initial pH range, which is expected to be applied to the treatment of large-scale industrial wastewater.

Authors+Show Affiliations

Key Laboratory for Advanced Materials and Institute of Fine Chemicals, National Engineering Laboratory for Industrial Wastewater Treatment, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, PR China.Key Laboratory for Advanced Materials and Institute of Fine Chemicals, National Engineering Laboratory for Industrial Wastewater Treatment, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, PR China.Key Laboratory for Advanced Materials and Institute of Fine Chemicals, National Engineering Laboratory for Industrial Wastewater Treatment, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, PR China.Key Laboratory for Advanced Materials and Institute of Fine Chemicals, National Engineering Laboratory for Industrial Wastewater Treatment, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, PR China.Key Laboratory for Advanced Materials and Institute of Fine Chemicals, National Engineering Laboratory for Industrial Wastewater Treatment, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, PR China. Electronic address: mingyangxing@ecust.edu.cn.Key Laboratory for Advanced Materials and Institute of Fine Chemicals, National Engineering Laboratory for Industrial Wastewater Treatment, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, PR China. Electronic address: jlzhang@ecust.edu.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31835050

Citation

Yi, Qiuying, et al. "Mo0 and Mo4+ Bimetallic Reactive Sites Accelerating Fe2+/Fe3+ Cycling for the Activation of Peroxymonosulfate With Significantly Improved Remediation of Aromatic Pollutants." Chemosphere, vol. 244, 2020, p. 125539.
Yi Q, Liu W, Tan J, et al. Mo0 and Mo4+ bimetallic reactive sites accelerating Fe2+/Fe3+ cycling for the activation of peroxymonosulfate with significantly improved remediation of aromatic pollutants. Chemosphere. 2020;244:125539.
Yi, Q., Liu, W., Tan, J., Yang, B., Xing, M., & Zhang, J. (2020). Mo0 and Mo4+ bimetallic reactive sites accelerating Fe2+/Fe3+ cycling for the activation of peroxymonosulfate with significantly improved remediation of aromatic pollutants. Chemosphere, 244, 125539. https://doi.org/10.1016/j.chemosphere.2019.125539
Yi Q, et al. Mo0 and Mo4+ Bimetallic Reactive Sites Accelerating Fe2+/Fe3+ Cycling for the Activation of Peroxymonosulfate With Significantly Improved Remediation of Aromatic Pollutants. Chemosphere. 2020;244:125539. PubMed PMID: 31835050.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Mo0 and Mo4+ bimetallic reactive sites accelerating Fe2+/Fe3+ cycling for the activation of peroxymonosulfate with significantly improved remediation of aromatic pollutants. AU - Yi,Qiuying, AU - Liu,Wenyuan, AU - Tan,Jinlin, AU - Yang,Bo, AU - Xing,Mingyang, AU - Zhang,Jinlong, Y1 - 2019/12/03/ PY - 2019/10/12/received PY - 2019/11/12/revised PY - 2019/12/02/accepted PY - 2019/12/14/pubmed PY - 2020/3/12/medline PY - 2019/12/14/entrez KW - Degradation KW - Fenton-like KW - Iron cycle KW - Mo powder KW - Sulfamethazine SP - 125539 EP - 125539 JF - Chemosphere JO - Chemosphere VL - 244 N2 - In Fe2+/peroxymonosulfate (PMS) activation system, the slow cycle rate of Fe3+/Fe2+ has been considered to be the limiting step in the remediation of organic contaminants. In this paper, commercial molybdenum (Mo) powder is employed as the cocatalyst in Fe2+/PMS system, which can significantly accelerate the Fe3+/Fe2+ cycling efficiency by the exposed bimetallic active sites of Mo4+ and Mo0, and the process is accelerated as the amount of Mo powder increased. The Mo cocatalytic Fe2+/PMS system exhibits an enhanced performance for the activation of PMS and the removal of different aromatic pollutants including dyes, phenolic pollutants and antibiotics, in a wide pH range of 4.0-9.0. Importantly, Mo powder exhibits excellent cycle performance in the PMS activation system, and rhodamine B (RhB) can be removed within 10 min even after 5 cycles. Electron paramagnetic resonance (EPR) prove that the sulfate radicals (SO4-) is the major reactive oxides species in the PMS activation, the increase of Fe2+ content induced by the cocatalytic effect of Mo powder can effectively promote the production of SO4- and increase the utilization of PMS. In addition, to observe the process of pollutant removal more intuitively, HPLC-MS is used to analyze the decomposing pathway of RhB and sulfadiazine in Mo+FeSO4+PMS system. It is believed that this research provides a new idea for the efficient activation of PMS by iron ions in a wide initial pH range, which is expected to be applied to the treatment of large-scale industrial wastewater. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/31835050/Mo0_and_Mo4+_bimetallic_reactive_sites_accelerating_Fe2+/Fe3+_cycling_for_the_activation_of_peroxymonosulfate_with_significantly_improved_remediation_of_aromatic_pollutants_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(19)32779-1 DB - PRIME DP - Unbound Medicine ER -