Nonradical reactions in environmental remediation processes: Uncertainty and challenges

Abstract

Recent discoveries of nonradical oxidation in aqueous-phase advanced oxidation processes (AOPs) have induced tremendous interest in environmental remediation of wastewater, whereas different findings from a variety of investigations have also raised severe controversies in the occurrence and mechanism of the nonradical reaction. Hence, critical understandings of the nonradical reaction will significantly advance the knowledge and its application for catalytic oxidation and wastewater treatment. In this review, we would like to present state-of-the-art research on nonradical pathways in persulfate-based AOPs, with emphases on the controversial methodologies for identifying the oxygen reactive species (ROS), ambiguous reaction mechanisms, intrinsic impacts of metal/carbon catalysts and organic substrates in the nonradical-based catalytic oxidation reactions. Moreover, further research directions on mechanistic investigation of the nonradical pathway with rational experimental design and advanced strategies, as well as the potential applications of the nonradical system are proposed.

RAS ID

28285

Document Type

Journal Article

Date of Publication

2018

School

School of Engineering

Copyright

subscription content

Publisher

Elsevier BV

Comments

Duan, X., Sun, H., Shao, Z., & Wang, S. (2018). Nonradical reactions in environmental remediation processes: Uncertainty and challenges. Applied Catalysis B: Environmental, 224, 973-982. Available here

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Link to publisher version (DOI)

10.1016/j.apcatb.2017.11.051