Advances in pollution levels and treatment technologies of short chain per-and polyfluoroalkyl substances in aquatic environment
With the gradual restricted generation and use of eight carbon chain per-and polyfluoroalkyl substances(PFAS),more and more short chain PFAS(CF2＜6)have been extensively used.However,short chain PFAS have good water solubility and are widely spread in the aquatic environment,causing widespread pollution,posing a potential threat to the ecological environment and human health.This study systematically reviews the pollution level and occurrence of short chain PFAS in the aquatic environment,compares and summarizes their removal methods and mechanisms,including adsorption,advanced oxidation,biodegradation and other treatment technologies.Although the most widely used and economical adsorption removal method can be effectively applied on long chain PF AS,its performance in removing short chain PFAS and material regeneration is poor.Techniques including sonolysis,photolysis and electrochemical techniques can degrade short chain PFAS,but their energy consumption is relatively high.Facing the increasingly widespread pollution,there is an urgent need to strengthen and upgrade water treatment technologies to improve the treatment efficiency of short chain PFAS and provide scientific basis for effectively removing them from the aquatic environment.
万方数据
维普
