Multimatrix measurement of persistent organic pollutants in Mar Chiquita, a continental saline shallow lake.
RAMSAR sites are determined by specific characteristics of the environment in terms of ecological productivity as well services for human development, but they are also one of the most threatened ecosystems. Thus, the objective of this work was to evaluate the dynamic of Persistent Organic Pollutants (POPs) in different biotic and abiotic matrixes of the RAMSAR site (wetlands with international importance), Mar Chiquita Lake. Sampling was performed according to land use (agricultural, urban, and industrial) at two stations: Laguna del Plata and Campo Mare. POPs were analyzed in superficial water (Sw), suspended particulate material (SPM), bottom sediment (Bs) and fish tissues (Odontesthes bonariensis). Organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) were analyzed by GC-ECD. HCHs, Endosulfans, DDTs, PCBs and PBDEs were found in all matrixes at both stations. The high persistence and transport processes are responsible for the occurrence of HCHs, DDTs and PCBs in Bs, SPM and fish tissues, even many years after their prohibition. PBDEs showed lower levels according to the scarcity of punctual sources in the area. Endosulfan showed variable amounts in agreement with application periods since this pesticide was used until a few years ago in this area. Finally, PCB levels overpassed the acceptable daily intake for human consumption being a risk for human health Thus, the present report confirms the occurrence of POPs in Mar Chiquita lake, alerting on the contribution of agricultural and urban pollutants in a RAMSAR site. Current results also raise concerns on biomagnification processes through the food web.
Instituto de Diversidad y Ecología Animal (CONICET-UNC), Universidad Nacional de Córdoba, Facultad de Ciencias Exactas Físicas y Naturales, Av. Vélez Sársfield 299 (5000), Córdoba, Argentina.
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Ballesteros
Instituto de Investigaciones Marinas y Costeras (CONICET-UNMdP), Universidad Nacional de Mar del Plata, Facultad de Ciencias Exactas y Naturales, Laboratorio de Ecotoxicología y Contaminación Ambiental, Funes 3350 (7600), Mar del Plata,Argentina. Electronic address: kmiglior@mdp.edu.ar.
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Miglioranza
Instituto de Investigaciones Marinas y Costeras (CONICET-UNMdP), Universidad Nacional de Mar del Plata, Facultad de Ciencias Exactas y Naturales, Laboratorio de Ecotoxicología y Contaminación Ambiental, Funes 3350 (7600), Mar del Plata,Argentina.
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Gonzalez
Laboratório de Microcontaminantes Orgânicos e Ecotoxicología Aquática, Universidade Federal do Rio Grande, Rio Grande, RS, Brazil.
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Fillmann
Instituto de Ciencia y Tecnología de Alimentos Córdoba (ICYTAC), CONICET and Facultad de Ciencias Químicas, Dpto. de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba. Bv Dr Juan Filloy s/n, Ciudad Universitaria, 5000-Córdoba, Argentina.
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Wunderlin
Instituto de Diversidad y Ecología Animal (CONICET-UNC), Universidad Nacional de Córdoba, Facultad de Ciencias Exactas Físicas y Naturales, Av. Vélez Sársfield 299 (5000), Córdoba, Argentina.
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Bistoni
D000818:Animals; D004784:Environmental Monitoring; D005399:Fishes / Q000378:metabolism; D020387:Food Chain; D055768:Halogenated Diphenyl Ethers / Q000032:analysis; D006843:Hydrocarbons, Chlorinated / Q000032:analysis; D060106:Lakes / Q000737:chemistry*; D010575:Pesticides / Q000032:analysis; D011078:Polychlorinated Biphenyls / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000032:analysis*; D053833:Wetlands
D055768:Halogenated Diphenyl Ethers; D006843:Hydrocarbons, Chlorinated; D010575:Pesticides; D014874:Water Pollutants, Chemical; D011078:Polychlorinated Biphenyls
Mar Chiquita Lake; Odontesthes bonariensis; Organochlorine pesticides; Polybrominated diphenyl ethers; Polychlorinated biphenyls