Research Progress on the Methods of Activating Persulfate in Advanced Oxidation Processes
In recent years,persulfate based advanced oxidation processes has been widely used in wastewater treatment and underground water pollution remediation due to its advantages of fast reaction rate,strong oxidation capacity,broad applicability,and cost-effectiveness.Although persulfate is a very powerful oxidant,its reaction with common pollutants is relatively slow.Therefore,to degrade pollutants at an acceptable rate,persulfate often needs to be activated to generate sulfate radicals with strong oxidation ability.This article reviews the commonly used methods for persulfate activation,including photoactivation,thermal activation,carbon material activation,alkali activation,electrical activation,and transition metal activation,and introduces their research progress and application examples.At the same time,the current problems of each method are discussed,and the future development of activated persulfate technology is also discussed.
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