PMID- 28054401 OWN - NLM STAT- MEDLINE DCOM- 20170509 LR - 20181202 IS - 1552-8618 (Electronic) IS - 0730-7268 (Linking) VI - 36 IP - 5 DP - 2017 May TI - Risk of POP mixtures on the Arctic food chain. PG - 1181-1192 LID - 10.1002/etc.3671 [doi] AB - The exposure of the Arctic ecosystem to persistent organic pollutants (POPs) was assessed through a review of literature data. Concentrations of 19 chemicals or congeneric groups were estimated for the highest levels of the Arctic food chain (Arctic cod, ringed seals, and polar bears). The ecotoxicological risk for seals, bears, and bear cubs was estimated by applying the concentration addition (CA) concept. The risk of POP mixtures was very low in seals. By contrast, the risk was 2 orders of magnitude higher than the risk threshold for adult polar bears and even more (3 orders of magnitude above the threshold) for bear cubs fed with contaminated milk. Based on the temporal trends available for many of the chemicals, the temporal trend of the mixture risk for bear cubs was calculated. Relative to the 1980s, a decrease in risk from the POP mixture is evident, mainly because of international control measures. However, the composition of the mixture substantially changes, and the contribution of new POPs (particularly perfluorooctane sulfonate) increases. These results support the effectiveness of control measures, such as those promulgated in the Stockholm Convention, as well as the urgent need for their implementation for new and emerging POPs. Environ Toxicol Chem 2017;36:1181-1192. (c) 2017 SETAC. CI - (c) 2017 SETAC. FAU - Villa, Sara AU - Villa S AD - Department of Earth and Environmental Sciences, University of Milano Bicocca, Milano, Italy. FAU - Migliorati, Sonia AU - Migliorati S AD - Department of Economics, Management, and Statistics, University of Milano Bicocca, Milano, Italy. FAU - Monti, Gianna Serafina AU - Monti GS AD - Department of Economics, Management, and Statistics, University of Milano Bicocca, Milano, Italy. FAU - Holoubek, Ivan AU - Holoubek I AD - Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Brno, Czech Republic. FAU - Vighi, Marco AU - Vighi M AD - Department of Earth and Environmental Sciences, University of Milano Bicocca, Milano, Italy. AD - Madrid Institute for Advanced Studies in Water (IMDEA Water), Madrid, Spain. LA - eng PT - Journal Article DEP - 20170105 PL - United States TA - Environ Toxicol Chem JT - Environmental toxicology and chemistry JID - 8308958 RN - 0 (Environmental Pollutants) RN - 0 (Halogenated Diphenyl Ethers) RN - DFC2HB4I0K (Polychlorinated Biphenyls) SB - IM MH - Animals MH - Arctic Regions MH - Ecosystem MH - Environmental Pollutants/chemistry/*metabolism MH - *Food Chain MH - Halogenated Diphenyl Ethers/chemistry/metabolism MH - Polychlorinated Biphenyls/chemistry/metabolism MH - Risk MH - Seals, Earless/metabolism MH - Ursidae/metabolism OTO - NOTNLM OT - Arctic OT - Mixture OT - Penalized regression smoothers OT - Persistent organic pollutants (POPs) OT - Risk assessment EDAT- 2017/01/06 06:00 MHDA- 2017/05/10 06:00 CRDT- 2017/01/06 06:00 PHST- 2016/06/08 00:00 [received] PHST- 2016/08/07 00:00 [revised] PHST- 2016/10/27 00:00 [accepted] PHST- 2017/01/06 06:00 [pubmed] PHST- 2017/05/10 06:00 [medline] PHST- 2017/01/06 06:00 [entrez] AID - 10.1002/etc.3671 [doi] PST - ppublish SO - Environ Toxicol Chem. 2017 May;36(5):1181-1192. doi: 10.1002/etc.3671. Epub 2017 Jan 5.