Assessing the Use of Probes and Quenchers for Understanding the Reactive Species in Advanced Oxidation Processes

Environmental Science & Technology, Год журнала: 2023, Номер 57(13), С. 5433 - 5444

Опубликована: Март 17, 2023

Advanced oxidation processes (AOPs) are increasingly applied in water and wastewater treatment. Understanding the role of reactive species using probes quenchers is one main requirements for good process design. However, much fundamental kinetic data reactions with lacking, probably leading to inappropriate probe quencher selection dosing. In this work, second-order rate constants over 150 such as •OH, SO4•-, Cl• chemical oxidants free chlorine persulfate were determined. Some previously ill-quantified (e.g., furfuryl alcohol methyl phenyl sulfoxide certain oxidants, nitrobenzene 1,4-dioxane halogen radicals) found be kinetically favorable. The specific can guided by improved database. criteria properly choosing dosages proposed along a procedure quantifying interference from addition. limitations approaches explicated, possible solutions combination other tools) proposed. Overall, database protocols provided work benefit future research understanding radical chemistry AOPs well radical-involved processes.

Язык: Английский

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Multiple Roles of Dissolved Organic Matter in Advanced Oxidation Processes

Environmental Science & Technology, Год журнала: 2022, Номер 56(16), С. 11111 - 11131

Опубликована: Июль 7, 2022

Advanced oxidation processes (AOPs) can degrade a wide range of trace organic contaminants (TrOCs) to improve the quality potable water or discharged wastewater effluents. Their effectiveness is impacted, however, by dissolved matter (DOM) that ubiquitous in all sources. During application an AOP, DOM scavenge radicals and/or block light penetration, therefore impacting their toward contaminant transformation. The multiple ways which different types sources impact oxidative purification are critically reviewed. inhibit degradation TrOCs, but it also enhance formation and reactivity useful for elimination alter transformation pathways contaminants. An in-depth analysis highlights inhibitory effect on efficiency TrOCs based DOM's structure optical properties its oxidants as well synergistic contribution from redox transient intermediates. AOPs influence types, mechanisms, extent byproducts formation. Research needs proposed advance practical understanding how be exploited purification.

Язык: Английский

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Treatment of textile wastewater by sulfate radical based advanced oxidation processes

Separation and Purification Technology, Год журнала: 2022, Номер 293, С. 121115 - 121115

Опубликована: Апрель 21, 2022

Язык: Английский

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Advanced redox processes for sustainable water treatment

Nature Water, Год журнала: 2023, Номер 1(8), С. 666 - 681

Опубликована: Июль 13, 2023

Язык: Английский

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Removal of organic pollutants through hydroxyl radical-based advanced oxidation processes

Ecotoxicology and Environmental Safety, Год журнала: 2023, Номер 267, С. 115564 - 115564

Опубликована: Окт. 25, 2023

The use of Advance Oxidation Process (AOPs) has been extensively examined in order to eradicate organic pollutants. This review assesses the efficacy photolysis, O3 based (O3/UV, O3/H2O2, O3/H2O2/UV, H2O2/UV, Fenton, Fenton-like, hetero-system) and sonochemical electro-oxidative AOPs this regard. main purpose some suggestions for advancement is facilitate elimination toxic Initially proposed purification drinking water 1980, have since employed various wastewater treatments. technologies are essentially a process intensification through hybrid methods treatment, which generate large amounts hydroxyl (•OH) sulfate (SO4·-) radicals, ultimate oxidants remediation covers ozone or UV treatment combination create powerful method treatment. novel approach demonstrated be highly effective, with acceleration oxidation Fenton reaction photocatalytic technologies. It clear that helpful degradation compounds. Additionally, other processes such as •OH SO4·- radical-based may also arise during contribute reduction target summarizes current development

Язык: Английский

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Influence and mechanism of water matrices on H2O2-based Fenton-like oxidation processes: A review

The Science of The Total Environment, Год журнала: 2023, Номер 888, С. 164086 - 164086

Опубликована: Май 17, 2023

Язык: Английский

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UV/chlorine advanced oxidation processes for degradation of contaminants in water and wastewater: A comprehensive review

Journal of environmental chemical engineering, Год журнала: 2022, Номер 10(3), С. 107508 - 107508

Опубликована: Март 9, 2022

Язык: Английский

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Degradation of Perfluorooctanoic Acid by Chlorine Radical Triggered Electrochemical Oxidation System

Environmental Science & Technology, Год журнала: 2023, Номер 57(25), С. 9416 - 9425

Опубликована: Июнь 9, 2023

Electrochemical oxidation (EO) has been shown to have the unique ability degrade perfluorooctanoic acid (PFOA), although radical chemistry involved in this degradation is unclear, particularly presence of chloride ions (Cl–). In study, reaction kinetics, free quenching, electron spin resonance, and probes were used examine roles ·OH reactive chlorine species (RCS, including Cl·, Cl2•–, ClO·) EO PFOA. Using NaCl, PFOA rates 89.4%–94.9% defluorination 38.7%–44.1% achieved after 480 min with concentrations ranging from 2.4 240 μM. The occurred via synergistic effect Cl· rather than through direct anodic oxidation. products density functional theory (DFT) calculations revealed that triggered first step reaction, thus initial transfer was not rate-limiting degradation. change Gibbs energy caused by 65.57 kJ mol–1, which more two times lower ·OH. However, subsequent demonstrated for time promising development electrochemical technology remove perfluorinated alkyl substances environment.

Язык: Английский

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Controlling contaminants using a far-UVC-based advanced oxidation process for potable reuse

Nature Water, Год журнала: 2023, Номер 1(6), С. 555 - 562

Опубликована: Июнь 15, 2023

Язык: Английский

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Advanced oxidation processes for water and wastewater treatment – Guidance for systematic future research

Heliyon, Год журнала: 2024, Номер 10(9), С. e30402 - e30402

Опубликована: Апрель 28, 2024

Advanced oxidation processes (AOPs) are a growing research field with large variety of different process variants and materials being tested at laboratory scale. However, despite extensive in recent years decades, many have not been transitioned to pilot- full-scale operation. One major concern the inconsistent experimental approaches applied across studies that impede identification, comparison, upscaling most promising AOPs. The aim this tutorial review is streamline future on development new solutions for advanced by providing guidance comparable scalable experiments. We discuss developments catalytic, ozone-based, radiation-driven, other AOPs, outline perspectives needs. Since standardized procedures available we propose basic rules key parameters lab-scale evaluation AOPs including selection suitable probe compounds scavengers measurement (major) reactive species. A two-phase approach assess AOP concepts proposed, consisting (i) proof-of-concept (technology readiness levels (TRL) 1-3), followed (ii) intended water matrix cost comparison an established process, applying such as UV fluence or ozone consumption (TRL 3-5). Subsequent demonstration 6-7) briefly discussed, too. Finally, highlight important tools thorough mechanistic risk assessment screening transformation products should be based chemical logic combined complementary (mass balance, calculations).

Язык: Английский

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