多溴代联苯醚热降解研究现状

Research Status of Thermal Degradation of Polybrominated Biphenyl Ethers

多溴代联苯醚(polybrominated diphenyl ethers,PBDEs)作为一种持久性有机污染物,在环境中分布广泛且易生物累积,热降解作为PBDEs的降解方法之一备受关注,但在热降解过程中会生成毒性更高的溴代二噁英类物质。本文对国内外PBDEs的热降解的脱溴加氢还原和醚键断裂重组两种途径进行总结,同时探讨了热降解的温度、金属盐、金属氧化物、零价金属等影响因素,并对存在的问题以及未来的研究方向进行了展望。

Polybrominated diphenyl ethers(PBDEs)are a group of persistent organic pollutants,which are widely distributed and easily bioaccumulated in the environment.Thermal degradation of PBDEs has attracted much attention,which will generate more toxic brominated dioxins.In this paper,two thermal degradation pathways of debromination hydrogenation reduction and ether bond cleavage recombination were summarized.At the same time,the paper explores the influencing factors of thermal degradation,such as temperature,metal salts,metal oxides,and zero valent metals.This paper therefore reveals existing problems and presents opportunities for future work in this field.