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Organizations & People
Pure Appl. Chem. Vol. 68, No. 9, pp. 1781-1789 (1996)
Sources and Environmental
Concentrations of Dioxins and Related Compounds
(Institute of Environmental Chemistry, Umeå University, S-901
87 Umeå, Sweden)
Polychlorinated dioxins and dibenzofurans
are two series of tricyclic aromatic compounds, which have been the
focus of the interest in the last decades; in all there exist more than
200 congeners. They are formed in numerous ways, primarily in incineration
processes and in industrial processes. It has also been found that they
are formed by natural processes. They are ubiquitous and have been quantified
in abiotic samples such as soil, sediments and air as well as in living
organisms, primarily aquatic organisms. A dramatic decrease in most
environmental concentrations including biological and human samples
of PCDDs and PCDFs has been identified. There is a discrepancy between
sources and environmental reservoirs which cannot be fully explained.
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