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Dioxin - dioxins/furans might only count as half a TEQ if...

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S. M. Ng, HKUST 1 Dioxin ( ° } c k ±   ) (Toxic) attributes in process (economic attributes)
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S. M. Ng, HKUST 2 How do we produce dioxin? Dioxin is a by-product of various processes industrial processes - bleaching paper pulp, and chemical and pesticide manufacture combustion processes - burning household trash, forest fires, and waste incineration natural processes – biological and photochemical processes smoking Dioxin is a highly toxic chemical that causes cancer and other health problems. Dioxin is solvable in fat and accumulates in animal body fat
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S. M. Ng, HKUST 3 How do we get dioxin? Chart from EPA Dioxin Reassessment Summary 4/94 - Vol. 1, p. 37 (Figure II-5. Background TEQ exposures for North America by pathway) [A TEQ is a dioxin Toxic EQuivalent, calculated by looking at all toxic dioxins and furans and measuring them in terms of the most toxic form of dioxin, 2,3,7,8-TCDD. This means that some
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Unformatted text preview: dioxins/furans might only count as half a TEQ if it's half as toxic as 2,3,7,8-TCDD.] If you're eating the typical North American diet, this is where you are getting your dioxin from: S. M. Ng, HKUST 4 Where do we get dioxin? Levels of Dioxin in U.S. Food Supply (1995): [Chart from May 2001 study by Arnold Schecter et. al., Journal of Toxicology and Environmental Health, Part A, 63:1–18] Note: freshwater fish were farm-raised on a diet of meat, which is why they show the highest dioxin levels in this study S. M. Ng, HKUST 5 Dioxin Poisoning - Yushchenko • Sunday, December 11, 2005 • KIEV, Ukraine -- Ukrainian prosecutors said that new tests on blood samples taken from President Viktor Yushchenko confirm a high level of dioxin poisoning....
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