IBBEA   24401
INSTITUTO DE BIODIVERSIDAD Y BIOLOGIA EXPERIMENTAL Y APLICADA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Assessment of organochlorine pesticides and PCBs in a multi matrix system from estuarine and its near-coastal areas of Argentina
Autor/es:
ONDARZA P.M.; SCENNA L.; SHIMABUKURO V.M.,; LO NOSTRO F.; MIGLIORANZA K.S.B.
Lugar:
Barcelona
Reunión:
Congreso; Society of Environmental Toxicology and Chemistry Europe 25th Annual Meeting.; 2015
Institución organizadora:
Society of Environmental Toxicology and Chemistry Europe
Resumen:
Estuaries are productive ecosystems exposed to an increasing pollution due to anthropogenic activities. The Bahía Blanca estuary (38º45´S-62º20´W) is one of the most economically important areas in Argentina, with an intensive agriculture production, commercial harbors and petro-chemicals industries. The environmental behavior of organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) in different biotic and abiotic matrixes was assessed in Rosales harbor (RH, inner site) and Pehuencó beach (PB, outside) of this estuary. OCPs and PCBs levels in water (N=12), suspended particulate matter (SPM, N=12), bottom sediments (BS, N=10), and the most abundant crab Cyrtograpsus angulatus (Decapoda, Varunidae) (N=18) were determined by GC-ECD. Concentrations are reported as ng/L in water, ng/g dry wt in SPM and BS, and ng/g wet wt in crab tissues. Water samples showed a predominance of OCPs in both sampling sites (3.7). SPM from PB presented a OCPs/PCBs ratio >1 (2.7) while those from RH was hepatopancreas (4.3) >muscle (1.5). OCPs levels in males from RH decrease with the increment of the carapace width with the major difference in hepatopancreas of organisms with >30 mm (4.8) and 1. This pattern indicates the technical mixture application for agricultural proposes, until their recently ban in Argentina. Enrichment in endosulfan sulfate was found in hepatopancreas of crabs in both sampling sites, suggesting the metabolism of the parent isomers in these organisms. The pollutants profile observed in crab tissues were similar to those found in water and BS, showing that C. angulatus is a suitable biomonitor for organic pollutants. This study revealed that land use in surrounding areas represents current sources of OCPs and PCBs to Bahía Blanca estuary. Consequently, future long-term monitoring programs in coastal areas are necessary in order to reduce the impact from agriculture and industrial activities on non-target communities.