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Title: Metals and metalloids in high-altitude Pyrenean lakes: sources and distribution in pre-industrial and modern sediments
Authors: Rodriguez-Iruretagoiena, Azibar
Gredilla, Ainara
de Vallejuelo, Silvia Fdez Ortiz
Arana, Gorka
Meaurio, Maite
Madariaga, Juan Manuel
Auguet, Jean Christophe
González González, Aridane 
Pokrovsky, Oleg S.
Camarero, Luis
de Diego, Alberto
UNESCO Clasification: 230331 Química del agua
250814 Aguas superficiales
230318 Metales
250618 Sedimentología
Keywords: Anthrophonic
High-Altitude Lakes
Metals And Metalloids
Pyrenees, et al
Issue Date: 2023
Journal: Environmental Science and Pollution Research 
Abstract: High-altitude Pyrenean lakes are ecosystems far from local pollution sources, and thus they are particularly sensitive to the atmospheric deposition of metals and metalloids. This study aims to quantify the effect of human activity in 18 lakes located in both side of the France–Spain frontier. Sediment cores were collected in summer 2013, sampled at a 1cm resolution and the concentration of 24 elements was measured by ICP-MS. Statistic and chemometric analysis of the results highlights the influence of the geographical position and lithogenic features of each lake basin on trapping pollutants. More than the 80% of the lakes showed values of enrichment factor (EF) above 2 for at least one of the elements investigated in at least one core interval, which corroborates the existence of historical anthropogenic inputs of elements in the studied area. The results demonstrate the natural origin of As and Ti in Pyrenees, together with the significant anthropogenic inputs of Cd, Pb, Sb and Sn from ancient times. The data set points mining activities as the main historical source of pollution and illustrate the large impact of the industrial revolution. The regional variability could reflect also differential long-range transport, followed by dry or wet deposition.
ISSN: 0944-1344
DOI: 10.1007/s11356-023-28347-6
Source: Environmental Science and Pollution Research [ISSN 0944-1344], (July 2023)
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