Activation of persulfate (PS) and peroxymonosulfate (PMS) and application for the degradation of emerging contaminants

Recent developments of zinc oxide based photocatalyst in water treatment technology: A review

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.

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Persulfate-Based Advanced Oxidation: Critical Assessment of Opportunities and Roadblocks.

Chemistry of persulfates in water and wastewater treatment: A review

Activated persulfate for organic chemical degradation: A review.

Removal of 2-MIB and geosmin using UV/persulfate: Contributions of hydroxyl and sulfate radicals

Effectiveness and mechanism of potassium ferrate(VI) preoxidation for algae removal by coagulation

This paper reviews the current eutrophication status of China's lakes. Details of the most eutrophic ‘Three Lakes’, i.e. Dianchi Lake, Taihu Lake and Chaohu Lake, are given. Based on an explanation of its causes, policies and technologies currently in practice in addition to research towards combating the eutrophication are illustrated using some specific cases. Finally, some management issues and long-term combating strategies are discussed. Copyright © 2007 Society of Chemical Industry

Wei Liu

Papers

Removal of 2-MIB and geosmin using UV/persulfate: Contributions of hydroxyl and sulfate radicals

Effectiveness and mechanism of potassium ferrate(VI) preoxidation for algae removal by coagulation

Water eutrophication in China and the combating strategies

THM, HAA and CNCl formation from UV irradiation and chlor(am)ination of selected organic waters.

Formation of disinfection by-products after pre-oxidation with chlorine dioxide or ferrate