Heavy metal inputs in Northern Patagonia lakes from short sediment core analysis View Full Text


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Article Info

DATE

2005-08

AUTHORS

Ribeiro Guevara S, A. Rizzo, R. Sánchez, M. Arribére

ABSTRACT

Heavy metal profiles of short sediment cores sampled from lakes located in Nahuel Huapi National Park, Northern Patagonia, Argentina, were determined by INAA. Core dating was performed by measuring natural 210Pb and anthropogenic 137Cs, and by identification of tephra layers. No evidence was found for the input increase of the trace elements Sb, Ba, Cs, Zn, Co, Hf, Ni, Se, Sr, Ti, U, and V in the lake environment. High As concentrations (up to 250 μg . g-1) were found in relation with the diffusion processes of Mn and Fe oxides. Strong correlation was observed between the Br concentration and organic matter content, but no evidence was found for the relevant increase of Br inputs in recent years. Ag concentrations were found to be enriched in the upper core layers over the baseline values determined for deep layers ranging from 0.1 to 0.2 μg . g-1. Hg concentration profiles were also enriched in the upper core layers over the baseline (from less than 0.07 to 0.2 μg . g-1 for pre-industrial time, to 0.1 to 0.3 μg . g-1 for modern times) but in relation with the increased organic matter content of the sediment. More... »

PAGES

481-493

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10967-005-0852-0

DOI

http://dx.doi.org/10.1007/s10967-005-0852-0

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1040371650


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