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Establishing geochemical background levels of selected trace elements in areas having geochemical anomalies: The case study of the Orbetello lagoon (Tuscany, Italy)

Establishing geochemical background levels of selected trace elements in areas having geochemical anomalies: The case study of the Orbetello lagoon (Tuscany, Italy)
Establishing geochemical background levels of selected trace elements in areas having geochemical anomalies: The case study of the Orbetello lagoon (Tuscany, Italy)
The determination of background concentration values (BGVs) in areas, characterised by the presence of natural geochemical anomalies and anthropogenic impact, appears essential for a correct pollution assessment. For this purpose, it is necessary to establish a reliable method for determination of local BGVs. The case of the Orbetello lagoon, a geologically complex area characterized by Tertiary volcanism, is illustrated. The vertical concentration profiles of As, Cd, Cr, Cu, Hg, Ni, Pb and Zn were studied in four sediment cores. Local BGVs were determined considering exclusively samples not affected by anthropogenic influence, recognized by means of multivariate statistics and radiochronological dating (137Cs and 210Pb). Results showed BGVs well-comparable with mean crustal or shale values for most of the considered elements except for Hg (0.87 mg/kg d.w.) and As (16.87 mg/kg d.w.), due to mineralization present in the catchment basin draining into the lagoon.
Sediments, Trace element concentration, Background value, Anthropogenic impact, Mercury contamination
0269-7491
96-103
Romano, Elena
107493c1-c14b-4d96-83b8-19406a921746
Bergamin, Luisa
5ea1fa94-62f6-4676-b714-7d1fefc8ed4c
Croudace, Ian W.
24deb068-d096-485e-8a23-a32b7a68afaf
Ausili, Antonella
46918472-7bbf-4649-a948-b8716ef34750
Maggi, Chiara
ffc2febd-6c14-4164-89c3-09f766facc73
Gabellini, Massimo
5afb58c4-f695-4106-a04b-379ea07cbce3
Romano, Elena
107493c1-c14b-4d96-83b8-19406a921746
Bergamin, Luisa
5ea1fa94-62f6-4676-b714-7d1fefc8ed4c
Croudace, Ian W.
24deb068-d096-485e-8a23-a32b7a68afaf
Ausili, Antonella
46918472-7bbf-4649-a948-b8716ef34750
Maggi, Chiara
ffc2febd-6c14-4164-89c3-09f766facc73
Gabellini, Massimo
5afb58c4-f695-4106-a04b-379ea07cbce3

Romano, Elena, Bergamin, Luisa, Croudace, Ian W., Ausili, Antonella, Maggi, Chiara and Gabellini, Massimo (2015) Establishing geochemical background levels of selected trace elements in areas having geochemical anomalies: The case study of the Orbetello lagoon (Tuscany, Italy). Environmental Pollution, 202, 96-103. (doi:10.1016/j.envpol.2015.03.017).

Record type: Article

Abstract

The determination of background concentration values (BGVs) in areas, characterised by the presence of natural geochemical anomalies and anthropogenic impact, appears essential for a correct pollution assessment. For this purpose, it is necessary to establish a reliable method for determination of local BGVs. The case of the Orbetello lagoon, a geologically complex area characterized by Tertiary volcanism, is illustrated. The vertical concentration profiles of As, Cd, Cr, Cu, Hg, Ni, Pb and Zn were studied in four sediment cores. Local BGVs were determined considering exclusively samples not affected by anthropogenic influence, recognized by means of multivariate statistics and radiochronological dating (137Cs and 210Pb). Results showed BGVs well-comparable with mean crustal or shale values for most of the considered elements except for Hg (0.87 mg/kg d.w.) and As (16.87 mg/kg d.w.), due to mineralization present in the catchment basin draining into the lagoon.

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More information

Published date: July 2015
Keywords: Sediments, Trace element concentration, Background value, Anthropogenic impact, Mercury contamination
Organisations: Geochemistry

Identifiers

Local EPrints ID: 377717
URI: http://eprints.soton.ac.uk/id/eprint/377717
ISSN: 0269-7491
PURE UUID: ce60e99f-27f8-4e18-8195-b73c757bdd3e

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Date deposited: 03 Jun 2015 13:05
Last modified: 15 Jul 2019 21:17

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