Bioaccumulation cyclodienes

Hexachlorocyclohexanes (HCHs) have not caused the problems of bioconcentration or bioaccumulation associated with DDT or the cyclodienes, and they have not been implicated in large-scale environmental problems. They will only be discussed briefly here, drawing attention to certain differences from the foregoing groups. 

Jorgenson, J.L. (2001). Aldrin and Dieldrin A Review of Research on Their Production, Environmental Deposition and Fate, Bioaccumulation, Toxicology, and Epidemiology in the United States—A relatively recent, wide-ranging review of two of the most important cyclodienes. 

Cyclodienes (chlordane, aldrin, dieldrin, heptachlor, endrin, mirex, endosulfan, chlordecone). This new class of pesticides appeared on the scene following World War II. Most of them are very stable to sunlight and persistent in soil and they were used to control termites and other insects. Their effectiveness leads to insect resistance and bioaccumulation in the food chain and for these reasons their use was banned between 1984 and 1988. These compounds affect the CNS in the same way, causing tremors, convulsions, and prostration to the maximum extent, depending on the rate and time of exposure. 

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