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Distribution of major, minor and trace elements in lake environments of Antarctica

Published online by Cambridge University Press:  28 September 2004

ORNELLA ABOLLINO
Affiliation:
Department of Analytical Chemistry, University of Torino, Via Giuria 5, 10125 Torino, Italy
MAURIZIO ACETO
Affiliation:
Department of Sciences and Advanced Technologies, University of East Piedmont, Spalto Marengo 33, 15100 Alessandria, Italy
SANDRO BUOSO
Affiliation:
Department of Analytical Chemistry, University of Torino, Via Giuria 5, 10125 Torino, Italy
MASSIMO GASPARON
Affiliation:
Department of Earth Sciences, University of Queensland, St Lucia, QLD 4072, Australia
WILLIAM J. GREEN
Affiliation:
School of Interdisciplinary Studies, Miami University, Oxford, OH 45056, USA
MERY MALANDRINO
Affiliation:
Department of Analytical Chemistry, University of Torino, Via Giuria 5, 10125 Torino, Italy
EDOARDO MENTASTI
Affiliation:
Department of Analytical Chemistry, University of Torino, Via Giuria 5, 10125 Torino, Italy

Abstract

The concentrations of major, minor and trace metals were measured in water samples collected from five shallow Antarctic lakes (Carezza, Edmonson Point (No 14 and 15a), Inexpressible Island and Tarn Flat) found in Terra Nova Bay (northern Victoria Land, Antarctica) during the Italian Expeditions of 1993-2001. The total concentrations of a large suite of elements (Al, As, Ba, Ca, Cd, Ce, Co, Cr, Cs, Cu, Fe, Ga, Gd, K, La, Li, Mg, Mn, Mo, Na, Nd, Ni, Pb, Pr, Rb, Sc, Si, Sr, Ta, Ti, U, V, Y, W, Zn and Zr) were determined using spectroscopic techniques (ICP-AES, GF-AAS and ICP-MS). The results are similar to those obtained for the freshwater lakes of the Larsemann Hills, East Antarctica, and for the McMurdo Dry Valleys. Principal Component Analysis (PCA) and Cluster Analysis (CA) were performed to identify groups of samples with similar characteristics and to find correlations between the variables. The variability observed within the water samples is closely connected to the sea spray input; hence, it is primarily a consequence of geographical and meteorological factors, such as distance from the ocean and time of year. The trace element levels, in particular those of heavy metals, are very low, suggesting an origin from natural sources rather than from anthropogenic contamination.

Type
Research Article
Copyright
© Antarctic Science Ltd 2004

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