The mechanism of persulfate activation is introduced,and the production pathway of sulfate rad-ical is reviewed.Sulfate radical can be produced by different persulfate activation methods,such as ther-mal activation,alkali activation,UV activation,transition metal ion activation,microwave activation,metal oxide activation,etc.,and can effectively treat organic wastewater.The advanced oxidation technology based on sulfate radical has a good application prospect,but it still has many problems and some limita-tions.In the future,it is necessary to increase the purification experiments of advanced oxidation process based on sulfate free radicals in real organic wastewater and develop new catalysts with low price,high ef-ficiency,stability and easy recovery,so as to explore the catalytic performance of natural organic com-pounds and reduce application costs and secondary pollution.
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