Combination of peroxymonosulfate and Fe(Ⅵ) for enhanced degradation of sulfamethoxazole: The overlooked roles of high-valent iron species

Zhang, Xiujuan; Zhu, Xiaobiao; Li, Hao; Wang, Caihan; Zhang, Tingting

doi:10.1016/j.cej.2022.139742

Cited by 37 publications

(7 citation statements)

References 57 publications

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“…Reactive high-valent metal-oxo complexes (RHVMOC, e.g., Fe(IV) ,,− (usually represent Fe IV O 2+ in Fe 2+ or Fe 3+ systems, and Fe IV O 4 4– or Fe IV O 3 2– in ferrate systems), Fe(IV)-ligand, , Fe(V), , Co(IV), ,, Ni(IV)-ligand, Cu(III), , Cu(III)-ligand, or Mn(V)-ligand, , in solution; Fe IV O, Fe V O, − Co IV O, ,, Ni &+ O, Ni IV O, Cu III -oxo, ,,, Mn IV -oxo, or Mn V -oxo, on catalysts surface) are also very significant and usually overlooked nonradicals in PS-AOPs (Figure c).…”

Section: Basic Concepts Cognitive Biases and Experimental Detailsmentioning

confidence: 99%

Were Persulfate-Based Advanced Oxidation Processes Really Understood? Basic Concepts, Cognitive Biases, and Experimental Details

Hu,

Zhu

2024

Environ. Sci. Technol.

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Persulfate (PS)-based advanced oxidation processes (AOPs) for pollutant removal have attracted extensive interest, but some controversies about the identification of reactive species were usually observed. This critical review aims to comprehensively introduce basic concepts and rectify cognitive biases and appeals to pay more attention to experimental details in PS-AOPs, so as to accurately explore reaction mechanisms. The review scientifically summarizes the character, generation, and identification of different reactive species. It then highlights the complexities about the analysis of electron paramagnetic resonance, the uncertainties about the use of probes and scavengers, and the necessities about the determination of scavenger concentration. The importance of the choice of buffer solution, operating mode, terminator, and filter membrane is also emphasized. Finally, we discuss current challenges and future perspectives to alleviate the misinterpretations toward reactive species and reaction mechanisms in PS-AOPs.

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Section: Basic Concepts Cognitive Biases and Experimental Detailsmentioning

confidence: 99%

Were Persulfate-Based Advanced Oxidation Processes Really Understood? Basic Concepts, Cognitive Biases, and Experimental Details

Hu,

Zhu

2024

Environ. Sci. Technol.

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“…Highvalent iron species can be partially scavenged by MeOH, and could also contribute to micropollutant degradation. However, in excess of PMS (ratio Fe(VI):PMS of 1:4) the dominant reactive species are • OH and SO4• - (Zhang et al 2023b).…”

Section: Degradation Of a Mixture Of Neonicotinoids By Ferrate-based ...mentioning

confidence: 99%

“…The presence of NOM at high concentrations typically hinders the oxidation of micropollutants by direct competition with ROS (He and Zhao 2023). Similarly, the presence of carbonate/bicarbonate ions in the secondary effluents might inhibit the degradation of neonicotinoids, since carbonate/bicarbonate react with • OH and SO4•to produce carbonate radicals with weaker oxidation capacity (Zhang et al 2023b). Probably, a significant increase in Fe(VI) and PMS doses would lead to an increase in the removal efficiency of neonicotinoids dissolved in these secondary effluents, but this effect has not been investigated further.…”

Section: Degradation Of a Mixture Of Neonicotinoids By Ferrate-based ...mentioning

confidence: 99%

Removal of neonicotinoids present in secondary effluents by ferrate(VI)-based oxidation processes

Real,

Acero,

Matamoros

2023

Preprint

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Neonicotinoids are a new class of insecticides derived from nicotine. However, their persistence in the environment and potential harmful effects have raised some concerns and proposed several measures for remediation. The main five neonicotinoids mainly used are: thiamethoxam (THM), imidacloprid (IMI), clothianidin (CLO), thiacloprid (THC), and acetamiprid (ACE). The aim of this work was to study the reactivity of these neonicotinoids with ferrate (Fe(VI)), focused on the determination of the second-order rate constants and the effect of pH and the organic matter present, and to evaluate the improvements in neonicotinoid removal reached by the ferrate-based processes Fe(VI)/peroxymonosulfate and Fe(VI)/sulfite. The most reactive compound with Fe(VI) was THC, followed by CLO and THM. ACE did not significantly react with Fe(VI). The second-order rate constants obtained at different pH confirm this trend. The optimum pH for efficient removal of the compounds was around 8, considering the predominance of the most reactive species HFeO4- and the decreasing self-decomposition of Fe(VI) with pH. The oxidation of the selected pollutants in secondary effluents by single Fe(VI) was rather slow, and only THC could be efficiently removed. The additional presence of peroxymonosulfate (Fe(VI)/PMS system) slightly increased the removal of neonicotinoids due to the formation of hydroxyl and sulfate radicals, being both the main reactive oxygen species. Finally, the additional presence of sulfite (Fe(VI)/sulfite system) considerably increased the oxidation rate of selected pollutants, with enhanced formation of hydroxyl and, especially, sulfate radicals. Results suggest that Fe(VI)/sulfite system can be applied efficiently to remove all the neonicotinoids.

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“…[24][25][26][27] Geopolymers have been used as catalysts for different applications, including H 2 generation, 28 biodiesel production, 29 wastewater treatment, and gas purification for environmental management. [30][31][32] Currently, a variety of metals and their oxides are used to activate PMS, such as iron, 33,34 manganese, 35 copper, 36 etc. Cobalt-based catalysts are the most effective, 37 but there is still a risk of leaching of cobalt ions in water bodies, which can cause adverse effects on human health.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, a variety of metals and their oxides are used to activate PMS, such as iron, 33,34 manganese, 35 copper, 36 etc. Cobalt‐based catalysts are the most effective, 37 but there is still a risk of leaching of cobalt ions in water bodies, which can cause adverse effects on human health 38 .…”

Section: Introductionmentioning

confidence: 99%

In situ growth of CuO on porous geopolymer spheres as green catalysts for enhanced peroxymonosulfate‐activated degradation of Orange I

Li,

Wang,

Bai

et al. 2023

J Am Ceram Soc.

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In this study, in situ growth of CuO on the surface of porous geopolymer catalyst spheres (GC) was prepared through a simple method for the activation of peroxymonosulfate (PMS) to degrade Orange I (OI) in water. GC‐0.01 exhibited an excellent performance with more than 95% degradation of OI within 30 min. The effects of PMS concentrations, catalyst dosage, Cl−, HCO3−, and humic acid (HA) on OI degradation in the GC‐0.01/PMS system were systematically investigated. The study of the mechanism showed that PMS combined with the catalyst to generate complexes on the surface of the spheres, which could degrade OI through an electron transfer pathway. In addition, a variety of reactive oxygen species, mainly 1O2, were also present in the GC‐0.01/PMS system, which could also degrade OI. This work provides new insight into the application of oxide‐modified geopolymers in the activation of PMS for water purification applications.

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Combination of peroxymonosulfate and Fe(Ⅵ) for enhanced degradation of sulfamethoxazole: The overlooked roles of high-valent iron species

Cited by 37 publications

References 57 publications

Were Persulfate-Based Advanced Oxidation Processes Really Understood? Basic Concepts, Cognitive Biases, and Experimental Details

Were Persulfate-Based Advanced Oxidation Processes Really Understood? Basic Concepts, Cognitive Biases, and Experimental Details

Removal of neonicotinoids present in secondary effluents by ferrate(VI)-based oxidation processes

In situ growth of CuO on porous geopolymer spheres as green catalysts for enhanced peroxymonosulfate‐activated degradation of Orange I

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