Antarctica is usually considered a pristine ecosystem; nevertheless it is influenced by Persistent Organic Pollutants (POPs),mainly driven by long-range atmospheric transport (LRAT). However, localized sources such as human and wildlife activities can also contribute to pollution, constituting contaminated points at a local scale. Antarctic ice-free areas, where rare lakes are located, are influenced by such sources. In this work we determine polychlorinated biphenyls (PCBs, including the non-Aroclor CB-11) and polybrominated diphenyl ethers (PBDEs) in water and sediment samples of 6 lakes in Northern Victoria Land and in soils near the Italian research station Mario Zucchelli. Determinations were performed through gas chromatography (GC) coupled both to low-resolution and highresolution mass spectrometry (LRMS, HRMS). POP concentrations in lakes resulted low and rather similar across the sites despite their distance: ΣPCBs range between 46 and 143 pg L−1 in water and 10 and 634 pg g−1 in sediments, while ΣPBDEs range between 60 and 151 pg L−1 in water and 193 and 1682 pg g−1 in sediments. Lakes exhibited limited amplification phenomena in water during the melting season. PBDEs in the soils near the base yielded more concerning results, reaching a concentration of 33 ng g−1.
Antarctica is usually considered a pristine ecosystem; nevertheless it is influenced by Persistent Organic Pollutants (POPs), mainly driven by long-range atmospheric transport (LRAT). However, localized sources such as human and wildlife activities can also contribute to pollution, constituting contaminated points at a local scale. Antarctic ice-free areas, where rare lakes are located, are influenced by such sources. In this work we determine polychlorinated biphenyls (PCBs, including the non-Aroclor CB-11) and polybrominated diphenyl ethers (PBDEs) in water and sediment samples of 6 lakes in Northern Victoria Land and in soils near the Italian research station Mario Zucchelli. Determinations were performed through gas chromatography (GC) coupled both to low-resolution and high-resolution mass spectrometry (LRMS, HRMS). POP concentrations in lakes resulted low and rather similar across the sites despite their distance: Sigma(PCBs) range between 46 and 143 pg L-1 in water and 10 and 634 pg g(-1) in sediments, while Sigma(PBDEs) range between 60 and 151 pg L-1 in water and 193 and 1682 pg g(-1) in sediments. Lakes exhibited limited amplification phenomena in water during the melting season. PBDEs in the soils near the base yielded more concerning results, reaching a concentration of 33 ng g(-1). (C) 2014 Elsevier B.V. All rights reserved.
Polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) in Antarctic ice-free areas: Influence of local sources on lakes and soils
VECCHIATO, MARCO;ZAMBON, STEFANO;ARGIRIADIS, ELENA;BARBANTE, Carlo;GAMBARO, Andrea;PIAZZA, Rossano
2015-01-01
Abstract
Antarctica is usually considered a pristine ecosystem; nevertheless it is influenced by Persistent Organic Pollutants (POPs), mainly driven by long-range atmospheric transport (LRAT). However, localized sources such as human and wildlife activities can also contribute to pollution, constituting contaminated points at a local scale. Antarctic ice-free areas, where rare lakes are located, are influenced by such sources. In this work we determine polychlorinated biphenyls (PCBs, including the non-Aroclor CB-11) and polybrominated diphenyl ethers (PBDEs) in water and sediment samples of 6 lakes in Northern Victoria Land and in soils near the Italian research station Mario Zucchelli. Determinations were performed through gas chromatography (GC) coupled both to low-resolution and high-resolution mass spectrometry (LRMS, HRMS). POP concentrations in lakes resulted low and rather similar across the sites despite their distance: Sigma(PCBs) range between 46 and 143 pg L-1 in water and 10 and 634 pg g(-1) in sediments, while Sigma(PBDEs) range between 60 and 151 pg L-1 in water and 193 and 1682 pg g(-1) in sediments. Lakes exhibited limited amplification phenomena in water during the melting season. PBDEs in the soils near the base yielded more concerning results, reaching a concentration of 33 ng g(-1). (C) 2014 Elsevier B.V. All rights reserved.File | Dimensione | Formato | |
---|---|---|---|
Microc Journal 2015.pdf
non disponibili
Tipologia:
Versione dell'editore
Licenza:
Accesso gratuito (solo visione)
Dimensione
8.75 MB
Formato
Adobe PDF
|
8.75 MB | Adobe PDF | Visualizza/Apri |
Revised PCBs and PBDEs in Antarctic Ice-free Areas Influence of Local Sources on Lakes and Soils.doc
accesso aperto
Tipologia:
Documento in Pre-print
Licenza:
Accesso libero (no vincoli)
Dimensione
1.55 MB
Formato
Microsoft Word
|
1.55 MB | Microsoft Word | Visualizza/Apri |
I documenti in ARCA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.