Formation of Octachlorodibenzo-p-dioxin in Tropical Ecosystems

摘要

Polychlorinated dibenzo-p-dioxins(PCDD)and dibenzofurans(PCDF)are the most hazardous organic pollutants formed mainly as a result of human economic activity.There exist altogether 75 PCDD and 135 PCDF congeners;of these,17 compounds with chlorine atoms in the 2-,3-,7-,and 8-positions are most hazardous.A large body of factual data on the industrial sources of PCDD/Fs and their levels in the environment has now been accumulated.However,in some cases,a significant unbalance between the amounts of PCDD/Fs entering the environment and their measured concentrations or an abnormal profile of toxic congeners is observed [1].