You need JavaScript to view this

Assessment of exposure and transfer of dioxins, dioxin-like PCBs and PCBs. Literature review; Expositionsbetrachtung und Beurteilung des Transfers von Dioxinen, dioxinaehnlichen PCB und PCB. Literaturstudie

Abstract

Causal correlations between environmental contamination with PCBs and PCDD/Fs and food and feed contamination with these substances are not been found so far. Because of the high importance of the transfer of these substances into the food chain this is subject to wide research. The present literature review summarizes the actual knowledge regarding emission, exposition and transfer of PCBs and Dioxins within the food chain. A particular focus has been laid to sources of emission, distribution processes and exposure assessment for environment and consumer. International publications as well as publications and reports on a German national level and so called ''grey'' literature were evaluated. In general it can be noticed that comparison of different publications is difficult since the authors usually do not differentiate between non-dioxin-like PCBs (ndl-PCBs) and dioxin-like PCBs (dl-PCBs). Most authors mix dl-PCBs and ndl-PCBs, a breakdown of the PCBs in single congeners is rarely given. Extended Abstract Due to atmospheric translocation PCBs and PCDD/Fs are ubiquitous distributed in the environment. The emissions in Germany could be reduced drastically in the first half of the nineties due to regulatory restrictions. At the same time contaminations detected in food and feed dropped down. But since 1997 no significant  More>>
Authors:
Hennecke, Dieter; [1]  Duering, Rolf-Alexander; Becker, Leonie [2] 
  1. Fraunhofer-Institut fuer Molekularbiologie und Angewandte Oekologie (IME), Schmallenberg (Germany)
  2. Giessen Univ. (Germany). Inst. fuer Bodenkunde und Bodenerhaltung
Publication Date:
Sep 15, 2011
Product Type:
Technical Report
Report Number:
UBA-FB-001496
Resource Relation:
Related Information: Umweltbundesamt. Texte v. 57/2011
Subject:
54 ENVIRONMENTAL SCIENCES; BENZOFURANS; BIOLOGICAL AVAILABILITY; DIOXIN; ENVIRONMENTAL EXPOSURE; POLYCHLORINATED BIPHENYLS; REVIEWS; RISK ASSESSMENT
Sponsoring Organizations:
Umweltbundesamt, Dessau (Germany); Bundesministerium fuer Umwelt, Naturschutz und Reaktorsicherheit, Berlin (Germany)
OSTI ID:
21489080
Research Organizations:
Umweltbundesamt, Dessau (Germany)
Country of Origin:
Germany
Language:
German
Other Identifying Numbers:
Other: Foerderkennzeichen UFOPLAN 3709 72 228; ISSN 1862-4804; TRN: DE11GC883
Availability:
Commercial reproduction prohibited; OSTI as DE21489080
Submitting Site:
DE
Size:
198 pages
Announcement Date:
Nov 07, 2011

Citation Formats

Hennecke, Dieter, Duering, Rolf-Alexander, and Becker, Leonie. Assessment of exposure and transfer of dioxins, dioxin-like PCBs and PCBs. Literature review; Expositionsbetrachtung und Beurteilung des Transfers von Dioxinen, dioxinaehnlichen PCB und PCB. Literaturstudie. Germany: N. p., 2011. Web.
Hennecke, Dieter, Duering, Rolf-Alexander, & Becker, Leonie. Assessment of exposure and transfer of dioxins, dioxin-like PCBs and PCBs. Literature review; Expositionsbetrachtung und Beurteilung des Transfers von Dioxinen, dioxinaehnlichen PCB und PCB. Literaturstudie. Germany.
Hennecke, Dieter, Duering, Rolf-Alexander, and Becker, Leonie. 2011. "Assessment of exposure and transfer of dioxins, dioxin-like PCBs and PCBs. Literature review; Expositionsbetrachtung und Beurteilung des Transfers von Dioxinen, dioxinaehnlichen PCB und PCB. Literaturstudie." Germany.
@misc{etde_21489080,
title = {Assessment of exposure and transfer of dioxins, dioxin-like PCBs and PCBs. Literature review; Expositionsbetrachtung und Beurteilung des Transfers von Dioxinen, dioxinaehnlichen PCB und PCB. Literaturstudie}
author = {Hennecke, Dieter, Duering, Rolf-Alexander, and Becker, Leonie}
abstractNote = {Causal correlations between environmental contamination with PCBs and PCDD/Fs and food and feed contamination with these substances are not been found so far. Because of the high importance of the transfer of these substances into the food chain this is subject to wide research. The present literature review summarizes the actual knowledge regarding emission, exposition and transfer of PCBs and Dioxins within the food chain. A particular focus has been laid to sources of emission, distribution processes and exposure assessment for environment and consumer. International publications as well as publications and reports on a German national level and so called ''grey'' literature were evaluated. In general it can be noticed that comparison of different publications is difficult since the authors usually do not differentiate between non-dioxin-like PCBs (ndl-PCBs) and dioxin-like PCBs (dl-PCBs). Most authors mix dl-PCBs and ndl-PCBs, a breakdown of the PCBs in single congeners is rarely given. Extended Abstract Due to atmospheric translocation PCBs and PCDD/Fs are ubiquitous distributed in the environment. The emissions in Germany could be reduced drastically in the first half of the nineties due to regulatory restrictions. At the same time contaminations detected in food and feed dropped down. But since 1997 no significant further reduction of environmental concentrations of PCBs and PCDD/Fs can be observed. Present emissions of PCBs and PCDD/Fs derive from nonpoint sources mainly, e.g. remobilisation from soils and sediments by surface erosion and volatilization. Further increasing emissions of PCDD/Fs are expected due to promotion of renewable energies (combustion of wood). A short term reduction of environmental concentrations is not likely due to the persistence of the compounds. Major exposure pathway for plants is via dry and wet deposition of contaminated particles and volatiles, depending on the physical-chemical properties of the various congeners. Uptake by the roots and systemic distribution is negligible. Metabolism in plants usually does not happen. Exposure of productive livestock occurs predominantly via feed or by uptake of contaminated soil while grazing. Feed contamination depends on various factors. In many cases local contamination of livestock could be attributed to contaminated feed. But there were also contamination in animals found which did not get contaminated feed apparently. The reason for the contamination is not known yet and should be subject to further research. So far no simple correlation between environmental contamination - feed contamination - livestock contamination is visible for PCBs and PCDD/Fs. Some research has been conducted on distribution and accumulation of PCBs and PCDD/Fs after uptake. Main target organs for accumulation are liver, fat tissue and milk. However, again no simple relations between congener properties and accumulation potential are given. Consumer exposition occurs for more than 90% via foods of animal origin. Based on the actual knowledge areas requiring further research have been determined for the most relevant processes. Further research is essential since due to actual publications the present exposure levels range close to a predicted biological effect concentration. (orig.)}
place = {Germany}
year = {2011}
month = {Sep}
}