219) The POPs are aldrin, chlordane, DDT, dieldrin, dioxins, endrin, furans, heptachlor
, hexachlorobenzene, mirex, polychlorinated biphenyls, and toxaphene.
Similarly, in the Preston River, DDT, aldrin, dieldrin, and heptachlor
residues were detected in a number of water samples.
Endrin and heptachlor
showed the highest percentage contributions.
Analytes included cis-chlordane (CC), trans-chlordane (TC), cis-nonachlor (CN), trans-nonachlor (TN), oxychlordane (OC), heptachlor
epoxide (HE), pp'-DDE, pp'-DDT, and PCB.
By summing the molar concentrations of the individual analytes within each group, we also created three summary exposure variables among structurally related or isomeric forms of OCPs: [summation]chlordane (sum of oxychlordane, heptachlor
epoxide, and trans-nonachlor), [summation]DDT (sum of p,p'-DDT and p,p'-DDE), and [summation]HCH (sum of [beta]-HCH and [gamma]-HCH).
Data for males and females were pooled together, because the only significant difference in results between them was in heptachlor
level, with females showing a higher level at 0-.
Maternal serum samples were analyzed for [BETA]-HCH, p,p'-DDE, p,p -DDT, dieldrin, heptachlor
epoxide, HCB, trans-nonachlor, oxychlordane, and 11 PCB congeners (28, 52, 74, 105, 118, 138, 153, 170, 180, 194, and 203) at the CDC from 1997 to 1999.
At a United Nations Environment Program (UNEP) meeting in Montreal this week, representatives of 92 nations began a process to enact similar global controls on 12 of those POPs: polychlorinated biphenyls (PCBs), dioxins, furans, and the pesticides aldrin, chlordane, DDT, dieldrin, endrin, heptachlor
, hexachlorobenzene, mirex, and toxaphene.
Mortality of workers employed in chlordane and heptachlor
manufacture was studied by Wang and MacMahon (5).
Among specific organochlorine chemicals that were evaluated in < 6 studies, including dieldrin, hexachlorobenzene (HCB), [beta]-hexachlorocyclohexane ([beta]-HCH), lindane ([gamma]-HCH), heptachlor
epoxide, mirex, and oxychlordane, we found positive patterns of associations (Figure 5).
In addition, testing has verified that the unit eliminates a wide range of volatile organic compounds (VOCs) like chloroform, benzene, heptachlor
, styrene, PCBs, trihalomethanes and 2,4-D.
Though releases of many substances on this list, including the toxic pesticides DDT, heptachlor
, and kepone, have been banned or severely restricted in the United States, such compounds continue to pollute the environment.