Elucidation of stoichiometric efficiency, radical generation and transformation pathway during catalytic oxidation of sulfamethoxazole via peroxymonosulfate activation

Bao, Yueping; Oh, Wen−Da; Lim, Teik−Thye; Wang, Rong; Webster, Richard D.; Hu, Xiao

doi:10.1016/j.watres.2018.12.007

Cited by 172 publications

(46 citation statements)

References 52 publications

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“…The catalytic performance of FeSe 2 for different oxidants such as H 2 O 2 , PS, and PMS was examined as part of work toward a new method for the degradation of different contaminants. 2,4,4′-Trichlorobiphenyl (PCB28), perfluorooctanoic acid (PFOA), bisphenol A (BPA), tetracycline (TC), and sulfamethoxazole (SMX) were selected as representative model pollutants, not only because they represent typical persistent organic pollutants and emerging contaminants of concern but also because their degradation mechanisms in the PMS activation systems have been well established. ,− Radical scavenger studies, electron paramagnetic resonance (EPR) analysis, and density functional theory (DFT) calculations were used to elucidate the underlying mechanism of PMS activation by FeSe 2 .…”

Section: Introductionmentioning

confidence: 99%

Synergy between Iron and Selenide on FeSe₂(111) Surface Driving Peroxymonosulfate Activation for Efficient Degradation of Pollutants

Fang

Zhang

Cui

et al. 2020

Environ. Sci. Technol.

100

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In this study, iron selenide nanoparticles (FeSe 2 ) were synthesized and applied in Fenton-like reactions for degradation of pollutants. It was found that FeSe 2 exerts excellent catalytic reactivity toward different oxidants including peroxymonosulfate (PMS), peroxydisulfate, and H 2 O 2 , which can degrade a wide range of pollutants such as 2,4,4′trichlorobiphenyl, bisphenol A, sulfamethoxazole, chlortetracycline, and perfluorooctanoic acid, with the degradation efficiency and TOC removal of pollutants reaching 55−95 and 20.3−50.9%, respectively. The mechanism of PMS activation by FeSe 2 was elucidated, and the synergistic effect between Fe and Se for PMS activation was discovered to be the dominant catalytic mechanism, as evidenced by free-radical quenching, electron paramagnetic resonance, and density functional theory studies. Briefly, the Fe(II) site on the FeSe 2 surface (111) accounted for PMS activation, while the reducing Se species on the surface not only acted as an electron donor contributing to Fe(II) regeneration but also produced Se vacancies further facilitating Fe(II) regeneration to improve the performance of PMS activation. In addition, FeSe 2 exhibited high catalytic activity and stability for PMS activation with different pH, and can degrade PCBs efficiently in the presence of anions, natural organic matter water matrices or in complex soil eluents. This study presents the development and evaluation of FeSe 2 as a novel and highly efficient activator that exhibits promise for practical applications for the degradation of pollutants in wastewater and soil wash eluent with Fenton-like reactions.

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Section: Introductionmentioning

confidence: 99%

Synergy between Iron and Selenide on FeSe₂(111) Surface Driving Peroxymonosulfate Activation for Efficient Degradation of Pollutants

Fang

Zhang

Cui

et al. 2020

Environ. Sci. Technol.

100

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“…In route 3, the opening of isoxazole ring occurred, leading to the generation of P4. Then, the C-N bond of P4 was cleaved by an electron-transfer reaction to produce P5 and P6 (Bao et al 2019). In route 4, the hydroxylation of heterocyclic ring occurred to induce P2.…”

Section: Possible Degradation Pathways and Toxicity Evaluation Of Int...mentioning

confidence: 99%

Facile synthesis of CoOOH@MXene to activate peroxymonosulfate for efficient degradation of sulfamethoxazole: performance and mechanism investigation

Xia

Deng

Yang

et al. 2022

Environ Sci Pollut Res

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Using MXene as substrate, CoOOH@MXene with different mass content of CoOOH were prepared and used to active PMS for the sulfamethoxazole (SMX) degradation. The samples characterizations demonstrated the successful preparation of CoOOH@MXene. CoOOH@MXene possessed much higher BET surface area (183.82 m 2 /g) than CoOOH (85.36 m 2 /g) and MXene (6.89 m 2 /g) due to the good dispersibility of CoOOH particles on MXene. Due to its large surface area, 1.3CoOOH@MXene displayed the best catalytic performance for the degradation of SMX. With 0.2 g/L of 1.3CoOOH@MXene and 0.5 mM of PMS, 20 μM of SMX was completely eliminated in 10 min. The degradation followed pseudo-rstorder kinetic model well, with rate constants of 0.33 min -1 and 0.054 min -1 for 1.3CoOOH@MXene and CoOOH. In uencing factors of initial pH, catalyst dosage, PMS concentration, SMX concentration and coexisting anions on SMX degradation were assessed systematically. Recycling tests veri ed the excellent reusability and stability of the catalyst. Quenching experiments and electron paramagnetic resonance analysis substantiated that 1 O 2 played a leading role. Moreover, the intermediates were identi ed, and degradation pathways and activation mechanism of CoOOH@MXene for PMS were proposed. This work may highlight the application of MXene with transition metals in PMS activation.

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“…[6][7][8] Compared with monometallic catalysts, the bimetallic oxide exhibits a synergistic effect between two metal compositions, which can improve the degradation capacity, catalyst stability and recovery efficiency. [9][10][11][12] However, present applications of most bimetallic oxide catalysts were hindered by their expensive cost and complicated preparation process. The solid waste catalyst prepared from metallurgical waste residue, therefore, has become a promising candidate due to its low-cost and high performance in recent years.…”

Section: Introductionmentioning

confidence: 99%

Oxygen vacancy enhances the catalytic activity of trimetallic oxide catalysts for efficient peroxymonosulfate activation

Zhong

et al. 2022

Environ. Sci.: Nano

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Elucidation of stoichiometric efficiency, radical generation and transformation pathway during catalytic oxidation of sulfamethoxazole via peroxymonosulfate activation

Cited by 172 publications

References 52 publications

Synergy between Iron and Selenide on FeSe₂(111) Surface Driving Peroxymonosulfate Activation for Efficient Degradation of Pollutants

Synergy between Iron and Selenide on FeSe₂(111) Surface Driving Peroxymonosulfate Activation for Efficient Degradation of Pollutants

Facile synthesis of CoOOH@MXene to activate peroxymonosulfate for efficient degradation of sulfamethoxazole: performance and mechanism investigation

Oxygen vacancy enhances the catalytic activity of trimetallic oxide catalysts for efficient peroxymonosulfate activation

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Elucidation of stoichiometric efficiency, radical generation and transformation pathway during catalytic oxidation of sulfamethoxazole via peroxymonosulfate activation

Cited by 172 publications

References 52 publications

Synergy between Iron and Selenide on FeSe2(111) Surface Driving Peroxymonosulfate Activation for Efficient Degradation of Pollutants

Synergy between Iron and Selenide on FeSe2(111) Surface Driving Peroxymonosulfate Activation for Efficient Degradation of Pollutants

Facile synthesis of CoOOH@MXene to activate peroxymonosulfate for efficient degradation of sulfamethoxazole: performance and mechanism investigation

Oxygen vacancy enhances the catalytic activity of trimetallic oxide catalysts for efficient peroxymonosulfate activation

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Synergy between Iron and Selenide on FeSe₂(111) Surface Driving Peroxymonosulfate Activation for Efficient Degradation of Pollutants

Synergy between Iron and Selenide on FeSe₂(111) Surface Driving Peroxymonosulfate Activation for Efficient Degradation of Pollutants