This study aims at establishing the regional background levels and upper thresholds (geochemical baseline) for some potentially toxic elements (As, Cr, Hg, Pb, Sb and Zn) in coastal sediments from two boreholes of the Nalón estuary, N-Spain. By applying a statistical approach, the outliers were identified and removed from the original dataset along with elemental concentration values not representative of the natural sedimentary environment. Results showed significant enrichments in element concentrations at the most recent sedimentary layers. This enrichment has been attributed to historical anthropogenic activities developed within the drainage the basin, and, for Hg, As and Sb, it is mainly due to mining contributions
Determinación de valores geoquímicos de fondo para la evaluación del enriquecimiento por metales y metaloides en los sedimentos estuarinos del Río Nalón (Norte de España)
COVELLI, STEFANO;
2016-01-01
Abstract
This study aims at establishing the regional background levels and upper thresholds (geochemical baseline) for some potentially toxic elements (As, Cr, Hg, Pb, Sb and Zn) in coastal sediments from two boreholes of the Nalón estuary, N-Spain. By applying a statistical approach, the outliers were identified and removed from the original dataset along with elemental concentration values not representative of the natural sedimentary environment. Results showed significant enrichments in element concentrations at the most recent sedimentary layers. This enrichment has been attributed to historical anthropogenic activities developed within the drainage the basin, and, for Hg, As and Sb, it is mainly due to mining contributionsFile | Dimensione | Formato | |
---|---|---|---|
García-Ordiales_et_al_.2016_Geo-Temas.pdf
Accesso chiuso
Descrizione: Articolo breve con copertina volume
Tipologia:
Documento in Versione Editoriale
Licenza:
Digital Rights Management non definito
Dimensione
9.06 MB
Formato
Adobe PDF
|
9.06 MB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.