IADO   05364
INSTITUTO ARGENTINO DE OCEANOGRAFIA
Unidad Ejecutora - UE
artículos
Título:
First records of PAHs and metals in sediments from a shallow lake in the Pampean/ Patagonian region (Argentina)First records of PAHs and metals in sediments from a shallow lake in the Pampean/ Patagonian region (Argentina)
Autor/es:
LA COLLA, N.S; PERILLO, G.M.E; OLIVA, A.L; BOTTÉ, S.E; ARIAS, A.H; PICCOLO, M.C
Revista:
MARINE AND FRESHWATER RESEARCH
Editorial:
CSIRO PUBLISHING
Referencias:
Lugar: Collingwood; Año: 2019
ISSN:
1323-1650
Resumen:
The present research evaluates, for the first time, organic and metal contaminants in sediments from Argentinean saline lakes, specifically La Salada shallow lake, a small polymictic lake in the south border of the Pampean region. It assessed the concentration of 16 priority polycyclic aromatic hydrocarbons (PAHs) and 8 metals (Cd, Cu, Cr, Fe, Mn, Ni, Pb, and Zn), and the ecotoxicological impact of these pollutants. The total concentration of 16 PAHs ranged from 12.55 to 10679.48 ng/g dry weight, with a predominance of 4-ringed PAHs. Molecular ratios analysis showed pyrolytic sources as their main origin. Among metals, Mn, Fe and Zn reached the highest concentrations in sediments over the rest of the elements. General metal levels revealed a multiplicity of point sources and rock weathering as their main origin. Regarding the potential ecotoxicological impact, adverse effects might be expected by PAHs since several compounds exceeded the sediment quality guidelines TEL (threshold effect level) and PEL (likely effect level). On the other hand, metal levels were below the safety guidelines. The present results were interpreted in an international context providing information that fulfills a gap in the impact record of Argentinean lakes and should have strong implications for future planning management.