Pub 3-01 - Dioxin PVC Healthcare.qxd
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چکیده
Dioxin is the name given to a group of persistent, very toxic chemicals. The group includes chlorinated dibenzofurans, and dibenzo-dioxins, the most toxic of which is 2,3,7,8 -tetrachlorodibenzo-p-dioxin (TCDD). The group also includes related compounds which are structurally similar and are dioxin-like in their activity. The toxicity of these compounds is measured against TCDD using “toxic equivalents,” which assign a fractional potency to each dioxin. Dioxins, defined here as dioxins and furans, have equivalence factors assigned to them. The US Environmental Protection Agency (EPA) has not assigned equivalence factors for brominated dioxins, brominated furans, brominated biphenyls and polychlorinated biphenyls (PCBs), although it is believed each group includes some dioxin-like compounds.
منابع مشابه
Suppression of dioxin emission in co-incineration of poly(vinyl chloride) with TiO2-encapsulating polystyrene.
This paper presents an approach to the suppression of the emission of dioxin and its precursors as a result of the co-incineration of poly (vinyl chloride) (PVC) with TiO2-encapsulating polystyrene (TEPS), in which TiO2 nanoparticles with the capacity to adsorb dioxin and its precursors are encapsulated without significant agglomeration. Field-emission scanning electron microscopy (FE-SEM) and ...
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TiO2 nanoparticle-encapsulating poly(vinyl chloride) (TEPVC) was combusted in a well-controlled laboratoryscale incinerator at a temperature of 700 °C, and then dioxins (PCDDs, PCDFs and coplanar-PCBs) formed in the exhaust gases were analyzed by high resolution gas chromatography/high resolution mass spectrometry (HRGC/HRMS). TEPVC sample was prepared by the suspension polymerization of vinyl ...
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