Accumulation of potentially toxic elements in sediments in Budi Lagoon, Araucania Region, Chile

Accumulation of potentially toxic elements in sediments in Budi Lagoon, Araucania Region, Chile

Detalles del proyecto

Author
Tapia, J., Vargas-Chacoff, L., Bertrán, C., Peña-Cortés, F., Hauenstein, E., Schlatter, R., . . . Fierro, P.

Descripcion del proyecto

The concentrations of Cd, Cu, Mn, Ni, Pb, Fe and Zn were determined in superficial sediments extracted from nine zones of Budi Lagoon, located in the Araucanı´a Region (Chile). The concentrations of these metals were determined by flame atomic absorption spectroscopy and the method was validated using certified reference material (marine sediment). The concentration ranges found for the trace elements were: Pb\0.5; Cd\0.2–3.9; Cu 21.8–61.9; Ni 31.2–59.4; Zn 54.5–94.8 mgkg-1 (dry weight). The elements that registered the highest concentrations were Mn 285.4–989.8 mgkg-1 and Fe 4.8–10.6 %. The lagoon cluster analysis of the stations was divided into three groups (Temo station with high Cu and low Mn concentrations, Bolleco, Comue´, Allipe´n and Deume 3 stations presented highest Cd concentration, and another group Botapulli, Rı´o Budi, Deume 2 and Deume 1 stations presented low levels of Cd). The textural characteristics of the sediment were determined (gravel, sand and mud) and the results were correlated with the concentrations of the metals in the various study zones. The sediments of Budi Lagoon presented high levels of Fe and Mn, which are of natural origin and exceed the maximum values recorded by many authors. With respect to the recorded concentrations for Cd, Cu, Ni and Zn, are within the ranges published by other authors in similar works. The Pb element was not detected. The results were subjected to statistical analysis to evaluate the correlations between the content of the elements and obtain the site of sediment.

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Seminario Gestión de la Emergencia: desde lo Local a lo Global

El equipo del laboratorio de Planificación Territorial de la Universidad Católica de Temuco, les invita a participar del “Seminario Gestión de la Emergencia: desde lo Local a lo Global”, en el marco del proyecto FONDEF Idea: “GESTIÓN DEL RIESGO DE DESASTRE ANTE LA OCURRENCIA DE EVENTOS CATASTRÓFICOS A TRAVÉS DE ESCENARIOS PROSPECTIVOS DE SOPORTE DECISIONAL Un aporte piloto geoespacial para el fortalecimiento de la resiliencia en la Región de La Araucanía, Chile”; y en el marco de la conmemoración del Día Internacional para la Reducción de los Desastres.

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