Abstract
Dioxin and furan (polychlorinated dibenzodioxin and polychlorinated dibenzofuran, PCDD/F) are productions in the combustion of chlorinated materials together with organic matters and in some industrial process as well. Because they are fat-soluble and difficult to decompose in the environment after being discharged, these chemicals have been considered as the persistent organic pollutant (POP). These substances, with high toxicity, have become a concern of health. This study involved literature research of papers in order to compare human burden of dioxins between Taiwan and other selected areas, and to depict factors associated with the blood concentration of dioxins. Health effects of dioxin were also briefly reviewed. Dioxins are referred to as two groups of 210 chemicals being linked the ring compound of a benzene pair by one (furan) or two (dioxin) oxygen atoms, including more than 75 kinds of polychlorinated dibenzo-p-dioxins (PCDDs) and 135 kinds of polychlorinated dibenzofurans (PCDFs ). The average concentrations of PCDD/Fs in the blood for Taiwan general populations are near to that of most Asian populations or slightly higher than that of Korean and Russian, lower than that of Japanese. In general, blood PCDD/Fs concentrations for Asian populations are lower than that for European populations, such as in Germany, Spain and Belgium, etc. The average blood TCDD/Fs concentrations for Taiwan populations varied among regions, ranged between 14.0 pg I-TEQ/g-lipid for Hsien Dien residents and for 21.2 pg I-TEQ/g-lipid for south Kaohsjung residents. The levels are higher for women (18.3±7.9 pg I-TEQ/g-lipid ) than for men (16.0±7.9 pg I-TEQ/g-lipid ). The average blood concentration increases as age increases (p<0.0001). Significant dose-response associations also have been reported between blood level and the body mass index and body fat ratio. The review study stresses the bioaccumulation of human dioxin burden is body fat associated. However, no significant health effect has been identified.
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