氯酚为前生体生成二噁英类的研究进展

Progress in Formation of Polychlornated Dibenzo-p-dioxins and Polychlorinated Dibenzofurans from Chlorophenol Precursors

评述了氯酚作为前生体生成二英类的问题 ,总结了热过程、光转化、酶反应三种途径中氯酚生成二英类的条件及机制。热过程中氯酚缩合成二英的主要影响因素为 :温度、热解时间、含氧量和催化剂 ;而光转化过程中光强、溶剂种类、光敏物质的存在对氯酚生成二英有影响 。

The fomation of Polychlorinated dibenzo-p-dioxins and Polychlorinated dibenzofurans from chlorophenol precursors have been reviewed. Conditions and mechanism of the formation of PCDDs and PCDFs are summarized in three passways such as pyrolysis, photolysis and enzyme reactions. In the pyrolysis, temperature, reaction time, oxygen and catalyzer are main factors for the conversion of chlorophyenols into PCDD/Fs, but in the photolysis, light intensity, solvent, photosensitivity affect the formation of PCDD/Fs from chlorophenols. The mechanism of formation of PCDD/Fs from chlorophenols is the radical mechansim in the pyrolysis and photolysis.