Research Advances of Degradation of Organic Pollutants by Activated Sulfite or Hydrosulfite

Compared to persulfate,sulfite (hydrosulfite)has lower price,more sources,and lower toxicity. During the activation of sulfite,not only the highly oxidizing free radicals such as SO4·-and SO5·- are produced,but also SO3·- which possesses oxidizability and reducibility is generated. Therefore,its autoxidation is realized when degradation of organic pollutants by activated sulfite (hydrosulfite),leading to no secondary pollution and broad development prospects. Activation pattern of sulfite (hydrosulfite)mainly contains activation of light,transition metals,carbon materials and electrodes. In this paper,we review the activation mechanism of sulfite (hydrosulfite),summarize the research progress on degradation of organic pollutants by activated sulfite (hydrosulfite),sketch the influencing factors of degradation of organic pollutants by activated sulfite (hydrosulfite),analyze the existing problems of degradation of organic pollutants by activated sulfite (hydrosulfite),and discuss the deve-lopment trends of degradation of organic pollutants by activated sulfite (hydrosulfite). It can provide direction and guidance for subsequent research. At present,this technology is still at the experimental stage and the related industrial application has not been reported. In future,once the technology becomes mature,it will occupy a place in field of degradation of organic pollutants. © 2024 Cailiao Daobaoshe/ Materials Review. All rights reserved.