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Synergistic activation of peroxymonosulfate and persulfate by ferrous ion and molybdenum disulfide for pollutant degradation: Theoretical and experimental studies.
Chemosphere. 2020 Feb; 240:124979.C

Abstract

Activation of peroxymonosulfate (PMS) and persulfate (PS) by Fe2+ is widely used for oxidizing organic pollutants. However, their application is limited by the slow conversion rate of Fe3+ to Fe2+ and the accumulation of Fe3+. Here, we introduce commercial molybdenum disulfide (MoS2) to promote the activation of PMS and PS by Fe2+, and explore the mechanism of this promotion using experimental and theoretical methods. The Fe2+/PMS/MoS2 and Fe2+/PS/MoS2 systems achieved faster rate of PMS and PS conversion and also higher degradation efficiency toward pollutants. About 94.7% and 87.6% of rhodamine B (RhB) could be degraded in Fe2+/PMS/MoS2 (54 μM Fe2+, 1 mM PMS) and Fe2+/PS/MoS2 (54 μM Fe2+, 0.25 mM PS) system, respectively. MoS2 addition simultaneously promoted the Fe3+/Fe2+ cycle, the PMS and PS conversion, and the RhB mineralization. As a co-catalyst, MoS2 exhibited excellent stability for eight successive cycles of use. The predominant oxidant was identified as SO4- in Fe2+/PMS/MoS2 and Fe2+/PS/MoS2 systems. Theoretical calculations and a kinetic model were employed to evaluate the catalytic performance of the systems. These novel findings indicate that the combination of a commercially available MoS2 catalyst with a low dosage of Fe2+ is a promising and effective approach for efficient activation of PMS and PS to produce SO4- and OH.

Authors+Show Affiliations

Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China.Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China.Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China.Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China. Electronic address: hwluo@zjut.edu.cn.Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China.Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China.Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China. Electronic address: panxl@zjut.edu.cn.Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18-26, Barcelona, 08034, Spain; Catalan Institute for Water Research (ICRA), University of Girona, Emili Grahit 101, Girona, 17003, Spain.Brook Byers Institute for Sustainable Systems, School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31726597

Citation

He, Dongqin, et al. "Synergistic Activation of Peroxymonosulfate and Persulfate By Ferrous Ion and Molybdenum Disulfide for Pollutant Degradation: Theoretical and Experimental Studies." Chemosphere, vol. 240, 2020, p. 124979.
He D, Cheng Y, Zeng Y, et al. Synergistic activation of peroxymonosulfate and persulfate by ferrous ion and molybdenum disulfide for pollutant degradation: Theoretical and experimental studies. Chemosphere. 2020;240:124979.
He, D., Cheng, Y., Zeng, Y., Luo, H., Luo, K., Li, J., Pan, X., Barceló, D., & Crittenden, J. C. (2020). Synergistic activation of peroxymonosulfate and persulfate by ferrous ion and molybdenum disulfide for pollutant degradation: Theoretical and experimental studies. Chemosphere, 240, 124979. https://doi.org/10.1016/j.chemosphere.2019.124979
He D, et al. Synergistic Activation of Peroxymonosulfate and Persulfate By Ferrous Ion and Molybdenum Disulfide for Pollutant Degradation: Theoretical and Experimental Studies. Chemosphere. 2020;240:124979. PubMed PMID: 31726597.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Synergistic activation of peroxymonosulfate and persulfate by ferrous ion and molybdenum disulfide for pollutant degradation: Theoretical and experimental studies. AU - He,Dongqin, AU - Cheng,Ying, AU - Zeng,Yifeng, AU - Luo,Hongwei, AU - Luo,Kai, AU - Li,Jun, AU - Pan,Xiangliang, AU - Barceló,Damià, AU - Crittenden,John C, Y1 - 2019/09/26/ PY - 2019/07/04/received PY - 2019/09/07/revised PY - 2019/09/25/accepted PY - 2019/11/16/entrez PY - 2019/11/16/pubmed PY - 2020/1/29/medline KW - Advanced oxidation processes KW - Peroxymonosulfate KW - Persulfate KW - Sulfate radicals KW - Synergistic activation SP - 124979 EP - 124979 JF - Chemosphere JO - Chemosphere VL - 240 N2 - Activation of peroxymonosulfate (PMS) and persulfate (PS) by Fe2+ is widely used for oxidizing organic pollutants. However, their application is limited by the slow conversion rate of Fe3+ to Fe2+ and the accumulation of Fe3+. Here, we introduce commercial molybdenum disulfide (MoS2) to promote the activation of PMS and PS by Fe2+, and explore the mechanism of this promotion using experimental and theoretical methods. The Fe2+/PMS/MoS2 and Fe2+/PS/MoS2 systems achieved faster rate of PMS and PS conversion and also higher degradation efficiency toward pollutants. About 94.7% and 87.6% of rhodamine B (RhB) could be degraded in Fe2+/PMS/MoS2 (54 μM Fe2+, 1 mM PMS) and Fe2+/PS/MoS2 (54 μM Fe2+, 0.25 mM PS) system, respectively. MoS2 addition simultaneously promoted the Fe3+/Fe2+ cycle, the PMS and PS conversion, and the RhB mineralization. As a co-catalyst, MoS2 exhibited excellent stability for eight successive cycles of use. The predominant oxidant was identified as SO4- in Fe2+/PMS/MoS2 and Fe2+/PS/MoS2 systems. Theoretical calculations and a kinetic model were employed to evaluate the catalytic performance of the systems. These novel findings indicate that the combination of a commercially available MoS2 catalyst with a low dosage of Fe2+ is a promising and effective approach for efficient activation of PMS and PS to produce SO4- and OH. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/31726597/Synergistic_activation_of_peroxymonosulfate_and_persulfate_by_ferrous_ion_and_molybdenum_disulfide_for_pollutant_degradation:_Theoretical_and_experimental_studies_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(19)32218-0 DB - PRIME DP - Unbound Medicine ER -