Persulfate-Based Advanced Oxidation: Critical Assessment of Opportunities and Roadblocks.,Environmental Science & Technology

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Persulfate-Based Advanced Oxidation: Critical Assessment of Opportunities and Roadblocks.
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2020-02-16 , DOI: 10.1021/acs.est.9b07082
Jaesang Lee ₁ , Urs von Gunten _{2,

3} , Jae-Hong Kim ₄

Affiliation

Reports that promote persulfate-based advanced oxidation process (AOP) as a viable alternative to hydrogen peroxide-based processes have been rapidly accumulating in recent water treatment literature. Various strategies to activate peroxide bonds in persulfate precursors have been proposed and the capacity to degrade a wide range of organic pollutants has been demonstrated. Compared to traditional AOPs in which hydroxyl radical serves as the main oxidant, persulfate-based AOPs have been claimed to involve different in situ generated oxidants such as sulfate radical and singlet oxygen as well as nonradical oxidation pathways. However, there exist controversial observations and interpretations around some of these claims, challenging robust scientific progress of this technology toward practical use. This Critical Review comparatively examines the activation mechanisms of peroxymonosulfate and peroxydisulfate and the formation pathways of oxidizing species. Properties of the main oxidizing species are scrutinized and the role of singlet oxygen is debated. In addition, the impacts of water parameters and constituents such as pH, background organic matter, halide, phosphate, and carbonate on persulfate-driven chemistry are discussed. The opportunity for niche applications is also presented, emphasizing the need for parallel efforts to remove currently prevalent knowledge roadblocks.

中文翻译：

基于过硫酸盐的高级氧化：机会和障碍的关键评估。

近来水处理文献中迅速积累了促进基于过硫酸盐的高级氧化工艺（AOP）替代基于过氧化氢的工艺的报道。已经提出了活化过硫酸盐前体中的过氧化物键的各种策略，并且已经证明了降解多种有机污染物的能力。与传统的以羟基自由基为主要氧化剂的AOP相比，基于过硫酸盐的AOP被认为涉及不同的原位生成的氧化剂，例如硫酸根和单线态氧以及非自由基氧化途径。但是，围绕这些权利要求中的一些存在有争议的观察和解释，挑战了该技术在实际应用中的强劲科学进展。这篇重要评论比较地研究了过氧单硫酸盐和过氧二硫酸盐的活化机理以及氧化物质的形成途径。仔细审查主要氧化物质的性质，并讨论了单线态氧的作用。此外，还讨论了水参数和成分（例如pH，背景有机物，卤化物，磷酸盐和碳酸盐）对过硫酸盐驱动化学的影响。还介绍了利基应用的机会，强调需要并行努力消除当前流行的知识障碍。讨论了水参数和诸如pH，背景有机物，卤化物，磷酸盐和碳酸盐等成分对过硫酸盐驱动化学的影响。还介绍了利基应用的机会，强调需要并行努力消除当前流行的知识障碍。讨论了水参数和诸如pH，背景有机物，卤化物，磷酸盐和碳酸盐等成分对过硫酸盐驱动化学的影响。还介绍了利基应用的机会，强调需要并行努力消除当前流行的知识障碍。

更新日期：2020-02-27

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