NIVELES DE COMPUESTOS ORGÁNICOS PERSISTENTES EN LLUVIA DE LA CIUDAD DE BUENOS AIRES COMO FUENTE POTENCIAL DE CONTAMINACIÓN DEL AGUA SUBTERRÁNEA

SHIMABUKURO, VALERIA; MARTINEZ, DANIEL E.; DAPEÑA, CRISTINA; MIGLIORANZA, KARINA

El Agua Subterránea Recurso sin Fronteras: Química, Calidad y Contaminación del Agua

Editorial de la Universidad Nacional de Salta

Lugar: Salta; Año: 2018; p. 179 - 186

with chronic toxicity, including organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs). Due to their characteristics and volatility can be found in biotic and abiotic matrices and be transported with air masses reaching distant regions through dry or wet depositions (rains). The objective of this work was to determine the contribution of wet deposition as a source of POPs for Buenos Aires city and its suburbs; moreover, to understand the relation with the factors affecting temporary deposition trends and the potential for groundwater contamination, mainly through the losses in rainwater networks.The rain samples were collected throughout the year 2015-2016 in 8 sampling sites. The OCPs (endosulfans, DDTs, HCHs, chlordanes, heptachlor and aldrins) were analyzed by gas chromatography with electron capture detector. The highest concentrations of pollutants were found at the end of summer in the area of Liniers (24.8 ug/L) followed by Mataderos (1.85 ug/L). The endosulfans was the most important pesticide group in all areas. The impact of agriculture and the urban/industrial areas itself in the wet deposition, alerts to the inputs ofpollutants into the aquifer in urban areas, especially due to losses in rainwater drainage networks.