PBDEs, PCBs and organochlorine pesticides distribution in edible fish from Negro River basin, Argentinean Patagonia

• Published in: Chemosphere (Oxford) Vol. 94; pp. 135 - 142
• Main Authors: Ondarza, P.M., Gonzalez, M., Fillmann, G., Miglioranza, K.S.B.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.01.2014; Elsevier
• Subjects: Agnatha. Pisces; Air. Soil. Water. Waste. Feeding; Animal, plant and microbial ecology; Animals; Applied ecology; Applied sciences; Argentina; Biological and medical sciences; Continental surface waters; Ecotoxicology, biological effects of pollution; Effects of pollution and side effects of pesticides on vertebrates; Environment. Living conditions; Environmental Monitoring; Exact sciences and technology; Fish; Fishes - metabolism; Food Contamination - statistics & numerical data; Fundamental and applied biological sciences. Psychology; Halogenated Diphenyl Ethers - analysis; Halogenated Diphenyl Ethers - metabolism; Human dietary intake; Humans; Hydrocarbons, Chlorinated - analysis; Hydrocarbons, Chlorinated - metabolism; Lindane; Medical sciences; Natural water pollution; Organochlorine pesticides; PBDEs; PCBs; Pesticides - analysis; Pesticides - metabolism; Pollution; Polychlorinated Biphenyls - analysis; Polychlorinated Biphenyls - metabolism; Public health. Hygiene; Public health. Hygiene-occupational medicine; Rivers - chemistry; Water Pollutants, Chemical - analysis; Water Pollutants, Chemical - metabolism; Water treatment and pollution; South America; Argentina; America; Tierra del Fuego; Human dietary intake; PCBs; Fish; Argentina; PBDEs; Organochlorine pesticides; Edible fish; Risk; Persistent organic pollutant; Freshwater environment; Tissue; Organochlorine compounds; Chlorocarbon; Pisces; Bromine Organic compounds; Aromatic compound; Stream; Muscle; Public health; Osteichthyes; Human; Ether; Pesticides; Polychlorobiphenyls; Flame retardant; Biological indicator; Rivers; Low volatile compound; Organic chlorine compounds; Vertebrata; Polybrominated diphenyl ethers; Food intake; Distribution; Surface water; Pollution source; Water pollution; Teleostei
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2013.09.064

[Display omitted] •Patagonian silverside was a functional sentinel-organism of POPs in Negro River.•OCPs, PCBs and PBDEs are ubiquitous contaminants in patagonian silverside tissues.•Intensive agriculture, industries and dams represent sources of POPs in Negro River.•PCBs levels in silverside muscles exceeded recommended limits for human consumption. DDTs, endosulfans, HCHs, chlordanes, PCBs and PBDEs levels were determined in different tissues of patagonian silverside (Odontesthes hatcheri) from the Upper (UV), Middle (MV) and Lower (LV) valleys of the Negro River, Argentina. Results showed a direct relation between pollutant levels in fish and land uses along the basin. All tissues showed decreasing levels from headwaters (UV) to downstream (LV). A significant predominance of organochlorine pesticides (306–3449ngg−1 lipid) followed by ΣPCBs (65–3102ngg−1 lipid) and ΣPBDEs (22–870ngg−1 lipid) was observed in all tissues and valleys, suggesting agriculture as the main source of pollutants in this basin. Pesticides were dominated by DDTs (90% pp′-DDE) followed by endosulfan (α->β->sulfate), γ-HCH and γ-chlordane showing the prevalence of legacy compounds. Endosulfan levels point out the current use of technical endosulfan in the surrounding areas. The highest PCBs and PBDEs concentrations observed in fish from UV were associated to hydroelectric power plants and industries established upstream. PCB fingerprint presented a prevailing contribution of hexa-CBs (66±7%) and penta-CBs (27±9%), with a similar composition to Aroclor 1254–1260. The predominance of BDE-47 (69±17%) among PBDEs, followed by BDE-100 and BDE-99, suggests possible debromination processes. These results were similar to worldwide trends found in fishes and environmental compartments. PCBs levels in silverside muscles along the Negro River exceeded the maximum limits for safe consumption, suggesting a possible human health risk related to silverside ingest. Therefore, a continued long-term monitoring of organic contaminants in fishes is needed in order to assess the potential risk for human health.