PMID- 26291759 OWN - NLM STAT- MEDLINE DCOM- 20160427 LR - 20181202 IS - 1879-1298 (Electronic) IS - 0045-6535 (Linking) VI - 138 DP - 2015 Nov TI - Source identification, spatio-temporal distribution and ecological risk of persistent organic pollutants in sediments from the upper Danube catchment. PG - 777-83 LID - S0045-6535(15)00786-9 [pii] LID - 10.1016/j.chemosphere.2015.08.001 [doi] AB - Riverine sediments, collected on a monthly basis during a period of one year, from five sites in a mixed land use region of the Czech Republic were analysed for chlorinated and brominated persistent organic pollutants (POPs). The region is located in the upper catchment of the Danube River. The POPs concentrations were as follows: 11-930 pg g(-1) polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDDs/Fs), 170-980 pg g(-1) dioxin-like polychlorinated biphenyls (dl-PCBs), 34-13,700 pg g(-1) polychlorinated naphthalenes (PCNs), 5.7-29,200 pg g(-1) polybrominated diphenylethers (PBDEs) and 0.21-351 ng g(-1) hexabromocyclododecanes (HBCDs). Concentrations expressed as toxic equivalents (TEQs), for PCDD/F+dl-PCB+PCN (TEQPCDD/F+dl-PCB+PCN) ranged from 0.37 to 19 pg g(-1). The results revealed a clear spatial separation between sites based on concentration and congener profile. There were also some obvious temporal patterns of selected POPs, which were related to river flow (seasonality) and organic carbon (TOC) of the sediment. Potential sources of POPs include local municipalities (flame retardants), some diffuse sources (PCNs and PCDDs/Fs) and potential point sources (PBDEs). Risk assessment based on risk quotients (RQ) revealed limited to medium ecological risk from PBDEs. TEQPCDD/F+dl-PCB+PCN were low relative to other European rivers, hence the risk to aquatic organisms was considered to be low. PCNs contributed significantly to overall TEQ in several cases. CI - Copyright (c) 2015 Elsevier Ltd. All rights reserved. FAU - Kukucka, Petr AU - Kukucka P AD - Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Faculty of Science, Kamenice 753/5, 625 00 Brno, Czech Republic. Electronic address: kukucka@recetox.muni.cz. FAU - Audy, Ondrej AU - Audy O AD - Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Faculty of Science, Kamenice 753/5, 625 00 Brno, Czech Republic. FAU - Kohoutek, Jiri AU - Kohoutek J AD - Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Faculty of Science, Kamenice 753/5, 625 00 Brno, Czech Republic. FAU - Holt, Eva AU - Holt E AD - Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Faculty of Science, Kamenice 753/5, 625 00 Brno, Czech Republic. FAU - Kalabova, Tereza AU - Kalabova T AD - Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Faculty of Science, Kamenice 753/5, 625 00 Brno, Czech Republic. FAU - Holoubek, Ivan AU - Holoubek I AD - Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Faculty of Science, Kamenice 753/5, 625 00 Brno, Czech Republic. FAU - Klanova, Jana AU - Klanova J AD - Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Faculty of Science, Kamenice 753/5, 625 00 Brno, Czech Republic. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20150818 PL - England TA - Chemosphere JT - Chemosphere JID - 0320657 RN - 0 (Hydrocarbons, Brominated) RN - 0 (Hydrocarbons, Chlorinated) RN - 0 (Water Pollutants, Chemical) SB - IM MH - Czech Republic MH - Ecology MH - Environmental Monitoring/*methods MH - Geologic Sediments/*chemistry MH - Hydrocarbons, Brominated/*analysis MH - Hydrocarbons, Chlorinated/*analysis MH - Risk Assessment MH - Rivers/chemistry MH - Spatio-Temporal Analysis MH - Water Pollutants, Chemical/*analysis OTO - NOTNLM OT - Ecological risk assessment OT - Persistent organic pollutants (POPs) OT - Sediment OT - Source identification EDAT- 2015/08/21 06:00 MHDA- 2016/04/28 06:00 CRDT- 2015/08/21 06:00 PHST- 2015/06/08 00:00 [received] PHST- 2015/07/30 00:00 [revised] PHST- 2015/08/01 00:00 [accepted] PHST- 2015/08/21 06:00 [entrez] PHST- 2015/08/21 06:00 [pubmed] PHST- 2016/04/28 06:00 [medline] AID - S0045-6535(15)00786-9 [pii] AID - 10.1016/j.chemosphere.2015.08.001 [doi] PST - ppublish SO - Chemosphere. 2015 Nov;138:777-83. doi: 10.1016/j.chemosphere.2015.08.001. Epub 2015 Aug 18.