Evaluation of diffusive gradients in thin-films (DGTs) as a monitoring tool for the assessment of the chemical status of transitional waters within the Water Framework Directive

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• 作者：N.  ; Montero^a ;   ; ^{nmontero@azti.es} ; M.J.  ; Belzunce-Segarra^a ; J.-L.  ; Gonzalez^b ; J.  ; Larreta^a ; J.  ; Franco^a
• 关键词：Diffusive gradients in thin-films ; Passive sampler ; Estuary ; Water Framework Directive ; Metal ; Monitoring
• 刊名：Marine Pollution Bulletin
• 出版年：2012
• 出版时间：January 2012
• 年：2012
• 卷：64
• 期：1
• 页码：31-39
• 全文大小：492 K

文摘

In this contribution, the potential use of diffusive gradients in thin-films (DGTs) for the chemical evaluation of transitional water bodies within the Water Framework Directive (WFD) has been studied. The water metal concentration has been evaluated in 13 estuaries in the southeastern Bay of Biscay. The DGTs were deployed in triplicate at two stations in each estuary, delimiting the tidal influence. The DGT results were in the ranges of 2?570 ng L^? for cadmium, 66?15 ng L^? for copper, 30?650 ng L^? for nickel and 0.8?5.5 ¦Ìg L^? for zinc. The DGTs provided reliable average labile metal concentrations in highly dynamic systems that were comparable with DGT measurements in coastal and estuarine waters worldwide. In addition, it was possible to discriminate those estuaries more susceptible to environmental impacts, being consistent with the historical contamination of each estuary. Based on the obtained results, a sampling strategy for the monitoring of transitional water bodies using DGTs is proposed.