[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: More or Less Dioxin??? (was Re: Dioxin Sources
Accept it or not, the data's the data. Numerous studies of environmental
samples like lake core sediments, herbage, soils and even human tissues like
fat and breast milk show a consistent picture. The amount of the reduction
over time varies from sample to sample but the shape of the curve is the
same. A good summary is Allcock and Jones ES&T 30,3133 (1996) but there are
others including a couple from Dioxin '96. The data doesn't depend on a
measurement of emissions by source as the Hites work you reference, it looks
at deposition in the environment and probably gives a better relative look.
Hites himself did some of the first work on this kind of sampling (Accts
Chem Res 23, 194 (1990), reproduced by Thomas & Spiro ES&T 30, 82A (1996)).
Why is this bad news? The world isn't perfect, but it's better. I think
Chlorine Chemistry Council