期刊
ENVIRONMENTAL RESEARCH
卷 212, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.envres.2022.113340
关键词
Biochar; Transition metal; Sulfate radical; Advanced oxidation processes; Organic pollutant degradation; Catalytic mechanism
资金
- Program for the National Natural Science Foundation of China [51909084, 51909085]
- China Postdoctoral Science Foundation [2018M642977]
- Natural Science Foundation of Hunan Province, China [2020JJ5055, 2020JJ5069]
- Fundamental Research Funds for the Central Universities [531118010247]
Sulfate radical-based advanced oxidation processes are important for degrading organic pollutants in water. Transition metal-modified biochar is widely used as a catalyst in these processes, providing excellent properties and synergistic effects.
Sulfate radical (SO4 center dot-) based advanced oxidation processes (SR-AOPs) is a very important chemical oxidation technology for the degradation of recalcitrant organic pollutants in water and has been well developed. Recently, transition metals or their oxides-modified biochar has been widely used as the catalyst to catalyze perox-ymonosulfate (PMS) and peroxydisulfate (PS) in SR-AOPs due to their outstanding properties (e.g., large surface area, high stability, abound catalytic sites, and diversity of material design, etc.). These composite materials not only combine the respective beneficial characteristics of biochar and transition metals (or their oxides) but also often present synergistic effects between the components. In this review, we present the synthesis of different types of transition metal (or metal oxides)/biochar-based catalysts and their application in SR-AOPs. The cata-lytic mechanism, including the generation process of free radicals and other reaction pathways on the surface of the catalyst were also carefully discussed. Particular attention has been paid to the synergistic effects between the components that result in enhanced catalytic performance. At the end of this review, the future development prospects of this technology are proposed.
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