About this Research Topic
In most water and industrial/agricultural wastewater treatment processes, traditional biological treatments do not work well owing to the high toxicity, high stability and non-biodegradable characterisitics of a large variety of organic substances. Sulfate radical-based advanced oxidation processes (SR-AOPs) have been an alternative method to eliminate refractory organic contaminants from wastewater with high redox potentials, long half-time and a wide pH range. However, the oxidants of persulfate and peroxymonosulfate cannot be activated efficiently by self-decompostion to generate sulfate radicals because of the low reaction rates. It is therefore urgent to develop efficient and economically sound methods to enhance the reaction efficiency to generate sulfate radicals using chemical and physical activation processes. Furthermore, the explicit working mechanisms of sulfate radicals on organic elimination are also needed to be clarified.
(1) To develop new activation processes for rapid generation of sulfate radicals, including novelty physical, chemical and other coupling approaches.
(2) To clarify the activation process during the generation of sulfate radicals using physical (thermal, microwave irradiation and other methods) and chemical (metal, non-mental and other kinds of activators) activation processes.
(3) To evaluate the economic applicability of various physical and chemical activation processes during the wastewater treatment (such as electrical energy per order).
(4) To explore the characteristics (i.e., structure, toxicity) of intermediates during the degradation process.
(5) To clearly determine the role of sulfate radicals and the possible working mechanisms for organic elimination during the degradation process.
(1) Scope of the Research Topic: Towards Sulfate Radical-based Advanced Oxidation Processes for Water and Wastewater Treatment, must be focused on the topic of SR-AOPs
(2) Specific themes of this special issue (Topics of interest include, but are not limited to:):
• Novel activation processes for sulfate radicals
• Toxicity and structure analysis of generated intermediates during SR-AOPs
• Performance of SR-AOPs during different water and wastewater treatments
• Interaction with activator and persulfate/peroxymonosulfate
(3) Types of manuscripts: Reviews, articles
(Cover image co-created by Prof Huichun Zhang and Guangshan Zhang)
Keywords: Sulfate radicals, Activation methods, Degradation mechanism, Water and Wastewater treatment, Kinetics and Intermediates
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