214) It immediately banned production and use of eight of these POPs,(215) and it identified four other POPs (DDT, heptachlor
, hexachlorocyclohexanes, and PCBs) that will be eliminated at a later stage.
The results from a Western Australian study revealed the presence of chlordane, DDT, dieldrin, and heptachlor
and [delta]-HCH were the most frequent pesticides in samples (Fig.
The insecticide heptachlor
, for example, reacts with air to leave the much more toxic compound heptachlor
epoxide in both plant and animal tissues.
Some of the major components are trans-chlordane, cis-chlordane, B-chlordane, heptachlor
, and trans-nonachlor.
The 11 OCPs or metabolites quantified were [beta]-hexachlorocyclohexane ([beta]-HCH), [gamma]-hexachlorocyclohexane ([gamma]-HCH), heptachlor
epoxide, oxychlordane, trans-nonachlor, two isomers of dichlorodiphenyltrichloroethane (p,p'-DDT, o,p'-DDT), dichlorodiphenyldichloroethylene (p,p'-DDE), dieldrin, hexachlorobenzene, and mirex.
The waste sites contain some of the most dangerous insecticides like the Persistent Organic Pollutants (POPs) aldrin, chlordane, DDT, dieldrin, endrin, heptachlor
The targeted compounds include dioxins and structurally related furans; polychlorinated biphenyls (PCBs); and the pesticides aldrin, chlordane, DDT, dieldrin, endrin, heptachlor
, hexachlorobenzene, mirex, and toxaphene.
Those that were developed later, such as aldrin and heptachlor
, generally were much more toxic than the original DDT.
Many organochlorines, including DDT, dioxins, furans, and PCBs, as well as the pesticides chlordane, heptachlor
, and hexachlorobenzene, disrupt the endocrine system and impair reproductive abilities.
beta]-hexachlorocyclohexane ([beta]-HCH), p,p'-DDE, p,p'-DDT, dieldrin, heptachlor
epoxide, hexachlorobenzene, trans-nonachlor, oxychlordane, and PCBs] and subsequent childhood obesity in a relatively large population whose exposure levels were measured in maternal serum collected before these chemicals were banned in the United States.
The POPs Treaty calls for the phase-out and ultimate elimination of 10 chemicals, which, in addition to PCBs, includes aldrin, endrin, dieldrin, hexachlorobenzene, chlordane, DDT, heptachlor
, mirex and toxaphene.