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Significant acceleration of Fe2+/ peroxydisulfate oxidation towards sulfisoxazole by addition of MoS2.
Environ Res. 2020 Sep; 188:109692.ER

Abstract

Activation of peroxydisulfate (PDS) by Fe2+ has been considered as an effective activation method to generate reactive oxygen species (ROS). However, the process is limited for the low production yield of ROS owing to the inefficient Fe3+/Fe2+ cycle. Herein, we demonstrated that Fe2+/PDS system in the presence of molybdenum sulfide (MoS2) was significantly efficient for the degradation of sulfisoxazole (SIX). As a co-catalyst in the Fe2+/PDS system, MoS2 could greatly enhance the Fe3+/Fe2+ cycle by the exposed Mo4+ active sites, which could also improve the PDS decomposition efficiency. As a result, the degradation efficiency of SIX in the MoS2/Fe2+/PDS system could reach to as high as 97.1% within 40 min, which was in distinct comparison with the 45.5% achieved by Fe2+/PDS system without MoS2. Besides, effects of various reaction conditions on SIX degradation were also evaluated during the experiments, including the dosages of MoS2, Fe2+, PDS and initial solution pH and the coexisting inorganic anions. In addition, both of sulfate radicals and hydroxyl radicals were identified as the dominant active species for SIX degradation by the radical scavenging experiments and verified by electron paramagnetic resonance (EPR). This study provides a promising idea for the degradation of organic contaminants in water treatment based on Fe2+/PDS process.

Authors+Show Affiliations

State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China.State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China; School of Civil Engineering and Transportation, Hebei University of Technology, Tianjin, 300401, PR China. Electronic address: tjy800112@163.com.College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing, 400044, PR China.College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing, 400044, PR China.State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32512373

Citation

Song, Xiumei, et al. "Significant Acceleration of Fe2+/ Peroxydisulfate Oxidation Towards Sulfisoxazole By Addition of MoS2." Environmental Research, vol. 188, 2020, p. 109692.
Song X, Tian J, Shi W, et al. Significant acceleration of Fe2+/ peroxydisulfate oxidation towards sulfisoxazole by addition of MoS2. Environ Res. 2020;188:109692.
Song, X., Tian, J., Shi, W., Cui, F., & Yuan, Y. (2020). Significant acceleration of Fe2+/ peroxydisulfate oxidation towards sulfisoxazole by addition of MoS2. Environmental Research, 188, 109692. https://doi.org/10.1016/j.envres.2020.109692
Song X, et al. Significant Acceleration of Fe2+/ Peroxydisulfate Oxidation Towards Sulfisoxazole By Addition of MoS2. Environ Res. 2020;188:109692. PubMed PMID: 32512373.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Significant acceleration of Fe2+/ peroxydisulfate oxidation towards sulfisoxazole by addition of MoS2. AU - Song,Xiumei, AU - Tian,Jiayu, AU - Shi,Wenxin, AU - Cui,Fuyi, AU - Yuan,Yixing, Y1 - 2020/06/01/ PY - 2020/04/17/received PY - 2020/05/14/revised PY - 2020/05/16/accepted PY - 2020/6/9/pubmed PY - 2020/6/9/medline PY - 2020/6/9/entrez KW - Fe(3+)/Fe(2+) cycle KW - Hydroxyl radicals KW - Molybdenum sulfide KW - Peroxydisulfate KW - Sulfate radicals SP - 109692 EP - 109692 JF - Environmental research JO - Environ. Res. VL - 188 N2 - Activation of peroxydisulfate (PDS) by Fe2+ has been considered as an effective activation method to generate reactive oxygen species (ROS). However, the process is limited for the low production yield of ROS owing to the inefficient Fe3+/Fe2+ cycle. Herein, we demonstrated that Fe2+/PDS system in the presence of molybdenum sulfide (MoS2) was significantly efficient for the degradation of sulfisoxazole (SIX). As a co-catalyst in the Fe2+/PDS system, MoS2 could greatly enhance the Fe3+/Fe2+ cycle by the exposed Mo4+ active sites, which could also improve the PDS decomposition efficiency. As a result, the degradation efficiency of SIX in the MoS2/Fe2+/PDS system could reach to as high as 97.1% within 40 min, which was in distinct comparison with the 45.5% achieved by Fe2+/PDS system without MoS2. Besides, effects of various reaction conditions on SIX degradation were also evaluated during the experiments, including the dosages of MoS2, Fe2+, PDS and initial solution pH and the coexisting inorganic anions. In addition, both of sulfate radicals and hydroxyl radicals were identified as the dominant active species for SIX degradation by the radical scavenging experiments and verified by electron paramagnetic resonance (EPR). This study provides a promising idea for the degradation of organic contaminants in water treatment based on Fe2+/PDS process. SN - 1096-0953 UR - https://www.unboundmedicine.com/medline/citation/32512373/Significant_acceleration_of_Fe2+/_peroxydisulfate_oxidation_towards_sulfisoxazole_by_addition_of_MoS2_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0013-9351(20)30585-5 DB - PRIME DP - Unbound Medicine ER -
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