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Evaluation of diffusive gradients in thin film (DGT) samplers for measuring contaminants in the Antarctic marine environment


Larner, BL and Seen, AJ and Snape, I, Evaluation of diffusive gradients in thin film (DGT) samplers for measuring contaminants in the Antarctic marine environment, Chemosphere, 65, (5) pp. 811-820. ISSN 0045-6535 (2006) [Refereed Article]

DOI: doi:10.1016/j.chemosphere.2006.03.028


This work has been the first application of DGT samplers for measuring metals in water and sediment porewater in the Antarctic environment, and whilst DGT water sampling was restricted to quantification of Cd, Fe and Ni, preconcentration using Empore chelating disks provided results for an additional nine elements (Sn, Pb, Al, Cr, Mn, Co, Cu, Zn, As). Although higher concentrations were measured for some metals (Cd, Ni, Pb) using the Empore technique, most likely due to particulate-bound or colloidal species becoming entrapped in the Empore chelating disks, heavy metal concentrations in the impacted Brown Bay were found to be comparable with the non-impacted O'Brien Bay. Sediment porewater sampling using DGT also indicated little difference between Brown Bay and O'Brien Bay for many metals (Cd, Al, Cr, Co, Ni, Cu), however, greater amounts of Pb, Mn, Fe and As were accumulated in DGT probes deployed in Brown Bay compared with O'Brien Bay, and a higher accumulation of Sn was observed in Brown Bay inner than any of the other three sites sampled. Comparison of DGT derived porewater concentrations with actual porewater concentrations showed limited resupply of Cd, Pb, Al, Cr, Mn, Co, Ni, Cu, Zn and As from the solid phase to porewater, with these metals appearing to be strongly bound to the sediment, however, resupply of Fe and Sn was apparent. Based upon our observations here, we suggest that Sn, and to a lesser extent Pb, are critical contaminants. Crown Copyright © 2006.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Atmospheric sciences
Research Field:Atmospheric composition, chemistry and processes
Objective Division:Environmental Management
Objective Group:Other environmental management
Objective Field:Other environmental management not elsewhere classified
UTAS Author:Larner, BL (Miss Bronwyn Larner)
UTAS Author:Seen, AJ (Associate Professor Andrew Seen)
ID Code:43117
Year Published:2006
Web of Science® Times Cited:24
Deposited By:Chemistry
Deposited On:2006-08-01
Last Modified:2015-09-01

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