基于亚硫酸盐的高级氧化技术及其反应机制研究进展

Sulfite-based advanced oxidation processes (S(IV)-AOPs) have received increasing attention in recent years. The S(IV) activation process involves the transformation of various sulfur-containing radicals and non-radical species, which usually makes the mechanism of a S(IV)-AOP complicated and controversial. However, the existing S(IV)-AOPs and their reaction mechanisms were rarely classified and summarized in detail. Therefore, this study concluded the physicochemical properties of S(IV) and the transformation mechanism of sulfur-containing radicals, reviewed various methods for activating S(IV), systematically illustrated reaction mechanisms in S(IV)-AOPs as well as the generation and contribution of active oxidants, and analyzed factors influencing the efficacy of contaminants degradation by S(IV)-AOPs. Finally, the future advances were proposed based on the current research status and needs about SIV)-AOPs to lay the foundation for S(IV)-AOPs application in the control of water pollution.