Title: Dioxins and dioxin-like compounds in composts and digestates from European countries as determined by the in vitro bioassay and chemical analysis
Authors: BENISEK MartinKUCKUCKA PetrMARIANI GiulioSUURKUUSK GERTGAWLIK BerndLOCORO GiovanniGIESY J.p.BLAHA Ludek
Citation: CHEMOSPHERE vol. 122 p. 168-175
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Publication Year: 2015
JRC N°: JRC94589
ISSN: 0045-6535
URI: http://www.sciencedirect.com/science/article/pii/S0045653514013599
http://publications.jrc.ec.europa.eu/repository/handle/JRC94589
DOI: 10.1016/j.chemosphere.2014.11.039
Type: Articles in periodicals and books
Abstract: Aerobic composting and anaerobic digestion plays an important role in reduction of organic waste by transforming the waste into humus, which is an excellent soil conditioner. However, applications of chem- ical-contaminated composts on soils may have unwanted consequences such as accumulation of persistent compounds and their transfer into food chains. The present study investigated burden of composts and dig- estates collected in 16 European countries (88 samples) by the compounds causing dioxin-like effects as determined by use of an in vitro transactivation assay to quantify total concentrations of aryl hydrocarbon receptor-(AhR) mediated potency. Measured concentrations of 2,3,7,8-Tetrachlorodibeno-p-dioxin (2,3,7,8-TCDD) equivalents (TEQbio) were compared to concentrations of polycyclic aromatic hydrocarbons (PAHs) and selected chlorinated compounds, including polychlorinated dibenzo-p-dioxins/furans (PCDD/ Fs), co-planar polychlorinated biphenyls (PCBs), indicator PCB congeners and organochlorine pesticides (OCPs). Median concentrations of TEQbio (dioxin-like compounds) determined by the in vitro assay in crude extracts of various types of composts ranged from 0.05 to 1.2 with a maximum 8.22 lg (TEQbio) kg1 dry mass. Potencies were mostly associated with less persistent compounds such as PAHs because treatment with sulfuric acid removed bioactivity from most samples. The pan-European investigation of contamina- tion by organic contaminants showed generally good quality of the composts, the majority of which were in compliance with conservative limits applied in some countries. Results demonstrate performance and added value of rapid, inexpensive, effect-based monitoring, and points out the need to derive correspond- ing effect-based trigger values for the risk assessment of complex contaminated matrices such as composts.
JRC Directorate:Sustainable Resources

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