Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 543, Issue -, Pages 581-590Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2015.10.159
Keywords
POPs; Top soil improvers; Food safety; Food security
Categories
Funding
- Italian Ministero della Salute [RF-2009-1534860]
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The organic carbon of biosolids from civil wastewater treatment plants binds persistent organic pollutants (POPs), such as polychlorodibenzo -dioxins and -furans (PCDD/Fs), dioxin and non-dioxin -like polychlorobiphenyls (DL and NDL-PCBs), polybrominated diphenyl ethers (PBDEs), and perfluorooctane sulfonic acid (PFOS). The use of such biosolids, derived digestates and composts as top soil improvers (TSIs) may transfer POPs into the food chain. We evaluated the potential carry-over of maiabioavailable congeners from amended soil-to-milk of extensive farmed sheep. Such estimates were compared with regulatory limits (food security) and human intakes (food safety). The prediction model was based on farming practices, flocks soil intake, POPs toxicokinetics, and dairy products intake in children, of the Mediterranean area. TSI contamination ranged between 0.20-113 ng WHO-TEQ/kg dry matter for PCDD/Fs and DL-PCBs (N = 56), 3.40-616 mu g/kg for Sigma(6) NDL-PCBs (N = 38), 0.06-17.2 and 0.12-22.3 mu g/kg for BDE no. 47 and no. 99, 0.872-89.50 mu g/kg for PFOS (N = 27). For a 360 g/head/day soil intake of a sheep with an average milk yield of 2.0 kg at 6.5% of fat percentage, estimated soil quality standards supporting milk safety and security were 0.75 and 4.0 ng WHO-TEQ/kg for PCDD/Fs and DL-PCBs, and 3.75 and 29.2 mu g/kg for
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