Persistent organic pollutants (POPs) and per- and polyfluoroalkyl substances (PFASs) in liver from wild and farmed tilapia (Oreochromis niloticus) from Lake Kariba, Zambia: Levels and geographic trends and considerations in relation to environmental quality standards (EQSs).

Autor: Simukoko CK; Department of Paraclinical Sciences, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, P. O. Box 5003 NMBU, 1432 Ås, Norway; Department of Biomedical Sciences, School of Veterinary Medicine, University of Zambia, P. O. Box 32379 Lusaka, Zambia., Mwakalapa EB; Department of Natural Sciences, Mbeya University of Science and Technology, P. O. Box 131, Mbeya, Tanzania., Muzandu K; Department of Biomedical Sciences, School of Veterinary Medicine, University of Zambia, P. O. Box 32379 Lusaka, Zambia., Mutoloki S; Department of Basic Sciences and Aquatic Medicine, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, P. O. Box 5003 NMBU, 1432 Ås, Norway., Evensen Ø; Department of Basic Sciences and Aquatic Medicine, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, P. O. Box 5003 NMBU, 1432 Ås, Norway., Ræder EM; Department of Paraclinical Sciences, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, P. O. Box 5003 NMBU, 1432 Ås, Norway., Müller MB; Department of Production Animal Clinical Sciences, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, P. O. Box 5003 NMBU, 1432 Ås, Norway., Polder A; Department of Paraclinical Sciences, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, P. O. Box 5003 NMBU, 1432 Ås, Norway. Electronic address: anuschka.polder@nmbu.no., Lyche JL; Department of Paraclinical Sciences, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, P. O. Box 5003 NMBU, 1432 Ås, Norway.
Jazyk: angličtina
Zdroj: Environmental research [Environ Res] 2023 Sep 01; Vol. 232, pp. 116226. Date of Electronic Publication: 2023 May 27.
DOI: 10.1016/j.envres.2023.116226
Abstrakt: The current study was carried out to investigate a wide variety of persistent organic pollutants (POPs) in wild and farmed tilapia (Oreochromis niloticus) in Lake Kariba, Zambia, and assess levels of POPs in relation to Environmental Quality Standards (EQSs). Concentrations of organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs), polybrominated diphenyls (PBDEs), and perfluoroalkyl substances (PFASs) were determined in liver samples of tilapia. PFASs compounds PFOS, PFDA and PFNA were only detected in wild fish, with the highest median PFOS levels in site 1 (0.66 ng/g ww). Concentrations of POPs were in general highest in wild tilapia. The highest median ∑DDTs (93 and 81 ng/g lw) were found in wild tilapia from sites 1 and 2, respectively 165 km and 100 km west of the fish farms. Lower DDE/DDT ratios in sites 1 and 3 may indicate relatively recent exposure to DDT. The highest median of ∑ 17 PCBs (3.2 ng/g lw) and ∑ 10 PBDEs (8.1 ng/g lw) were found in wild tilapia from sites 1 and 2, respectively. The dominating PCB congeners were PCB-118, -138, -153 and -180 and for PBDEs, BDE-47, -154, and -209. In 78% of wild fish and 8% of farmed fish ∑ 6 PBDE concentrations were above EQS biota limits set by the EU. This warrants further studies.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 The Authors. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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