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Pathways of polychlorinated dibenzothiophenes (PCDTs) in the environment

Czerwiński J.

Archives of Environmental Protection

2008

Vol. 34, no. 3

169-181

Pathways of PCDTs and PCTAs in the environment are discussed. Data on levels of these compounds in various part of the environment and their possible sources are presented. Finally, the data on biological effects of PCDTs and PCTAs based on some preliminary toxicological investigations are given.

Ocena występowania dioksyn w środowisku morskim

Florek A.

Ekologia i Technika

2000

R. 8, nr 4

100-108

Dioxins are halogenated aromatic chemical compounds which have been the subject of much concern and debate over last years. A review of structures, chemical properties, sources, pollution and the occurrence in the marine environment is presented. Dioxins are two groups of tricyclic aromatic compounds polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) and also related aromatic compounds; like mono- and non-orto-polychlorinated biphenyls (PCBs) and polychlorinated naphthalenes (PCNs) (sometimes called "dioxin-like" compounds). Dioxins are formed in numerous sources like chemical, thermal, photochemical and enzymatic reactions, primarily in incineration and industrial processes. These very persistent halogenated aromatic compounds have been found throughout the world in practically all compartments of abiotic and biotic systems, including air, soil, water, fish, animals. A large number of these compounds have been observed to have toxicological effects at very low concentrations. PCDDs, PCDFs non-orto-PCBs have been found to have very similar biological and physicochemical properties. Consequently, sophisticated analytical methods should allow identifying and quantiffying multitude related compounds which are present in biological environmental matrix has been described. Nondestructive analytical method for suitable biological samples of marine environment. Many different compounds can be analyzed from the same sample using these methods, even if the amount of sample is limited.