Encyclopedia of Environmental Science and Engineering, Volume I and II

876 PCBs AND ASSOCIATED AROMATICS It is not yet possible to estimate the sensitivity of humans to the toxic effects of PCDDs. It ...

PCBs AND ASSOCIATED AROMATICS 877 but structure/activity relationships do not predict that they should be particularly toxic. Ne ...

878 PCBs AND ASSOCIATED AROMATICS TABLE 14 The most highly PCB contaminated Yusho oils also contained the highest relative conce ...

PCBs AND ASSOCIATED AROMATICS 879 there sufficient data to observe any possible trends which may exist between PCDF formation an ...

880 PCBs AND ASSOCIATED AROMATICS TABLE 18 The relative ratios of toxic contaminants in Yusho and Yu-Cheng oils are constant Con ...

PCBs AND ASSOCIATED AROMATICS 881 of PCBs: PCDFs in both Yusho and Yu-Cheng poisoning incidents were about 200:1 the greater tox ...

882 PCBs AND ASSOCIATED AROMATICS FIGURE 19 Benzyne or other free radical formation of polychlorinated naphthalenes. FIGURE 20 P ...

PCBs AND ASSOCIATED AROMATICS 883 the formation of chloride ion and the consumption of hydrox- ide ion were approximately equal ...

884 PCBs AND ASSOCIATED AROMATICS hydroxyl anions the radiolysis reaction requires very much larger irradiation doses and hence ...

PCBs AND ASSOCIATED AROMATICS 885 indicated that it is unlikely that PCNs would add signifi- cantly to the toxicity of PCBs at t ...

886 PCBs AND ASSOCIATED AROMATICS TABLE 20 PCDFs in new and used commercial PCB mixtures Polychloro dibenzo furans PCB Cl^4 Cl^5 ...

PCBs AND ASSOCIATED AROMATICS 887 PCDDs polychlorinated phenoxy radical → non toxic com- bustion product PCDDs → non-toxic com- ...

888 PCBs AND ASSOCIATED AROMATICS FIGURE 23 (continued) Mechanism of dioxin formation in flames [Schaub and Tsang, 1983]. FIGURE ...

PCBs AND ASSOCIATED AROMATICS 889 FIGURE 31 FIGURE 32 FIGURE 33 FIGURE 34 FIGURE 35 (13) FIGURE 36 represent the same species as ...

890 PCBs AND ASSOCIATED AROMATICS 500 600 700 800 900 1000 1100 1200 1300 T(K) Formation of PCDDs from PCPs During Incineration ...

PCBs AND ASSOCIATED AROMATICS 891 Residence time calculations can be made from consider- ation of an ideal plug-flow reactor in ...

892 PCBs AND ASSOCIATED AROMATICS The furnace volume, V  A · x e ∴⋅ ⋅ ⎛ ⎝⎜ ⎞ ⎠⎟ t Q V TT T T   1 () ln em m (10) that is , th ...

PCBs AND ASSOCIATED AROMATICS 893 TABLE 23 PCDF toxicity decreases with decreasing lateral Cl substituents PCDF Induction potenc ...

894 PCBs AND ASSOCIATED AROMATICS TABLE 24 The most active compounds are those with Cl substitution at the 2,3,7, and 8 position ...

PCBs AND ASSOCIATED AROMATICS 895 Tables 27 and 28 show the calculated daily intake of PCDDs and PCDFs from foods. The values us ...