Levels and trends of persistent organic pollutants in ringed seals (Phoca hispida) from Central West Greenland, with particular focus on polybrominated diphenyl ethers (PBDEs).

摘要: Polybrominated diphenyl ethers (PBDEs) and the organochlorine compounds polychlorinated biphenyls (PCBs), DDTs, HCB, chlordane-related pesticides, HCH toxaphene were analysed in blubber of juvenile ringed seals from Central West Greenland collected between 1982 2006. The longest time series could be established for PBDEs, partly based on archived material, while PCBs DDTs covered a study period 1994-2006. All organochlorines showed decreasing trends, most pronounced DDT with an annual change 8%. BDE-47 had significantly increasing trend 5% annually. It was only BDE congener consistently above detection limit, median concentrations 0.78 ng/g lw to 3.54 lw, i.e. about 10 times lower than values East observed similar seal [Riget F, Vorkamp K, Dietz R, Rastogi SC. Temporal studies polybrominated (PCBs) Greenland. J Environ Monit 2006; 8: 1000-5]. A clear East>West difference also found but not chlordanes, or HCHs. Sigma 10-PCB, Chlordanes concentrations, typically exceeding SigmaPBDE by two orders magnitude. intermediate group, highest 135 20 respectively. For compound groups, circumpolar previously under example Arctic Monitoring Assessment Programme confirmed, apparently, more data are needed toxaphene. Statistical analyses patterns samples revealed greater differences different sampling years. Higher proportions chlordanes HCHs those Based principal component analysis individual compounds, contain higher chlorinated CB congeners. Varying locations may caused exposure situations related contaminant emissions transport, feeding habits affect composition.