Artículo
Long-term (1970-2017) temporal trends of polychlorinated biphenyls in fish, settling material, and sediments from populated and remote sites in Río de la Plata estuary, Argentina
Colombo, Juan Carlos; Speranza, Eric Demian
; Astoviza, Malena
; Migoya, Maria Carolina
; Skorupka, Carlos Norberto; Morrone, Manuel; Heguilor, Santiago
; Tatone, Leandro Martín
; Bilos, Claudio
Fecha de publicación:
11/2018
Editorial:
American Chemical Society
Revista:
Environmental Science & Technology
ISSN:
0013-936X
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Temporal trends of polychlorinated biphenyls (PCBs) were studied for detritivorous fish (1996-2017) and settling material (2002-2017) from polluted Buenos Aires coast and for a dated sediment core (1970-2013) from the outer Río de la Plata estuary. In spite of contrasting concentrations [5.3 ± 6.3 μg·g -1 dry weight (dw) for fish, 48 ± 26 ng·g -1 dw for settling material, and 1.5 ± 0.7 ng·g -1 dw for core], all three revealed exponentially decreasing trends over time (97%, 83%, and 83%, respectively). Time trends showed peak maxima coincident with Argentina's period of maximum PCB usage in 1973-1980 (80 cm depth in the core) and pulse discharges related to PCB banning in 2001-2002 (fish) with a lighter signature enriched in less persistent tri- and tetrachlorobiphenyls. The log-linear PCB time trends compare well with the predicted decrease for a high emission scenario from global emission data; the best fit was observed for the less impacted sediment core (-2%·year -1 versus -3%·year -1 for emission scenario). Steeper slopes are observed for the more polluted settling material (-5%·year -1 ) and especially for fish, in which the background decline trend tripled after the 2001 PCB pulse (from -7%·year -1 to -21%·year -1 ). These PCB time trends in related environmental compartments from contrasted sites provide rare evidence for evaluating the effectiveness of control measures in southern South America.
Palabras clave:
POLYCHLORINATED BIPHENYLS
,
FISH
,
RIO DE LA PLATA
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CCT - LA PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Citación
Colombo, Juan Carlos; Speranza, Eric Demian; Astoviza, Malena; Migoya, Maria Carolina; Skorupka, Carlos Norberto; et al.; Long-term (1970-2017) temporal trends of polychlorinated biphenyls in fish, settling material, and sediments from populated and remote sites in Río de la Plata estuary, Argentina; American Chemical Society; Environmental Science & Technology; 52; 21; 11-2018; 12412-12418
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