Brominated, chlorinated and mixed brominated/chlorinated persistent organic pollutants in European eels (<i>Anquilla anquilla</i>) from Latvian lakes

<p>Fifty-eight European eel (<i>Anquilla anquilla</i>) specimens collected from five Latvian lakes were investigated for six groups of persistent organic pollutants (POPs), including polychlorinated, polybrominated and mixed bromo-chloro dibenzo-<i>p</i>-dioxins and dibenzofurans (PCDD/DFs, PBDD/DFs and PXDD/DFs), polychlorinated and mixed bromo-chloro biphenyls (PCBs and PXBs) and polybrominated diphenyl ethers (PBDEs). PCDD/DFs and PCBs were found to occur in the range 0.85–15.8 pg Total-WHO<sub>2005</sub>-TEQ g<sup>−1</sup> f.w., and concentrations in most of the samples were below the maximum levels specified in European Commission Regulation (EU) No. 1259/2011. The summed concentrations of 27 PBDEs (∑<sub>PBDE</sub>) and 16 non-dioxin-like PCBs (∑<sub>NDL-PCB</sub>) were in the ranges of 0.28–26.7 and 6.37–320 ng g<sup>−1</sup> f.w., respectively. PBDD/DFs, PXDD/DFs and PXBs show average upper-bound concentrations of 0.05, 0.06 and 0.01 pg TEQ f.w. and collectively contributed 3.4% to the sum TEQ of dioxin-like compounds. The highest contaminant concentrations were measured in samples from lakes near the Baltic Sea and the industrialised area near Riga (Liepajas and Kisezers lakes). A correlation of POP concentration with the length of collected specimens was observed.</p>