Artículo
Airborne PCB patterns and urban scale in the Southern Río de la Plata Basin, Argentina
Astoviza, Malena
; Cappelletti, Natalia Elsa
; Bilos, Claudio; Migoya, Maria Carolina
; Colombo, Juan Carlos
Fecha de publicación:
07/2016
Editorial:
Elsevier Science
Revista:
Science of the Total Environment
ISSN:
0048-9697
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Atmospheric Polychlorinated Biphenyls (PCBs: ∑ 42 congeners) collected by polyurethane passive samplers (PAS-PUFs) in 29 stations from July 2010 to February 2014 (n = 141) in the most productive and populated Southern Rio de la Plata area in Argentina were evaluated to assess concentration gradients, potential sources and compositional profiles related to different land use and urbanization. On a global scale, total airborne PCBs concentrations are low/very low (below detection limit to 937 pg m−3 ) and show a significant potential correlation with urban scale increasing 2.5 times each 10 times increase of population reflecting the primary role of urbanization controlling PCB emissions. Compositional patterns evaluated by principal component analysis (PCA) of individual congeners indicated that highly populated atmospheres are enriched in lighter, more volatile tri, tetra and penta chlorine congeners of lighter Aroclor mixtures (from 1242 to 1254) suggesting actual emission of fresh PCBs signatures from sealants, combustion and/or electrical equipment. Sub urban and rural sites show a gradual transition to heavier Aroclor mixtures (from 1254 to 1260) with predominance of more persistent hexa and hepta PCBs indicating an aged background signal resulting from long range transport and/or reemission from historic reservoirs such as soils.
Palabras clave:
Endosulfan
,
Passive
,
Air
,
Samplers
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
Astoviza, Malena; Cappelletti, Natalia Elsa; Bilos, Claudio; Migoya, Maria Carolina; Colombo, Juan Carlos; Airborne PCB patterns and urban scale in the Southern Río de la Plata Basin, Argentina; Elsevier Science; Science of the Total Environment; 572; 7-2016; 16-22
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