title: 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.
abstract: 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 2-1570 ng L(-1) for cadmium, 66-515 ng L(-1) for copper, 30-3650 ng L(-1) for nickel and 0.8-95.5 μg L(-1) 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.
authors.affiliation: AZTI-Tecnalia, Marine Research Division, Herrera Kaia, Portualdea s/n, 20110 Pasaia, Spain. Electronic address: nmontero@azti.es.
authors.forename: N
authors.initials: N
authors.lastname: Montero
authors.affiliation: AZTI-Tecnalia, Marine Research Division, Herrera Kaia, Portualdea s/n, 20110 Pasaia, Spain.
authors.forename: M J
authors.initials: MJ
authors.lastname: Belzunce-Segarra
authors.affiliation: IFREMER, Département Biogéochimie et Ecotoxicologie, B.P. 330 Zone Portuaire de Brégaillon, 83507 La Seyne/mer cedex, France.
authors.forename: J-L
authors.initials: JL
authors.lastname: Gonzalez
authors.affiliation: AZTI-Tecnalia, Marine Research Division, Herrera Kaia, Portualdea s/n, 20110 Pasaia, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Larreta
authors.affiliation: AZTI-Tecnalia, Marine Research Division, Herrera Kaia, Portualdea s/n, 20110 Pasaia, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Franco
mesh_terms: D004784:Environmental Monitoring / Q000295:instrumentation / Q000331:legislation & jurisprudence / Q000379:methods*; D058735:Environmental Policy; D005602:France; D007878:Legislation as Topic; D008670:Metals / Q000032:analysis; D012623:Seawater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014877:Water Pollution, Chemical / Q000706:statistics & numerical data
chemical_list: D008670:Metals; D014874:Water Pollutants, Chemical