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Title: Assessment of the effects of dredging on metal levels in port waters using DGT passive samplers and spot sampling
Authors: Silva, H. Carvalhal; Montero, N.; Belzunce, Maria Jesus; Menchaca, Iratze
Abstract: Aiming at assessing the effect of dredging activities on the levels of metals in Bilbao Port (northern Spain), dissolved and labile metal concentrations in the water were concurrently measured, before, during, and after dredging activities by spot sampling and Diffusive Gradients in Thin-films (DGTs) passive samplers, respectively. Most of the dissolved metal results were below the quantification limits (Cd, <0.06-0.26 <mu>g/L; Co, <5 <mu>g/L; Cu, <5-15 <mu>g/L; Fe, <10-48 <mu>g/L; Mn, <10-22 <mu>g/L; Ni, <2.6-7 <mu>g/L; Pb, <0.39-0.8 <mu>g/L; Zn, <9-24 <mu>g/L). In contrast, DGT results for all sampling times and stations were obtained (Cd, 0.02-0.12 mu g/L; Co, 0.08-0.15 mu g/L; Cu, 0.5-2.8 mu g/L; Fe, 1.0-3.6 mu g/L; Mn, 4.7-23.5 mu g/L; Ni, 0.5-0.9 mu g/L; Pb, 0.15-0.28 mu g/L; Zn, 2.6-7.2 mu g/L), enabling to determine those metals affected by dredging. Only labile-Pb concentration surpassed momentarily the DGT-Environmental Quality Standard, enabling to rule out biological effects on biota. DGTs are a promising technique for facilitating decision-making during dredging operations.
Keywords: Metal; Spot sampling; DGT passive sampler; Port waters; Dredging; Impact assessment; IN-SITU MEASUREMENT; TRACE-METALS; THIN-FILMS; DIFFUSIVE GRADIENTS; MARINE WATERS; COASTAL; IMPACT; SPECIATION; ESTUARINE; ENVIRONMENTS
Issue Date: 2024
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Type: Article
Language: 
DOI: 10.1016/j.marpolbul.2024.116653
URI: http://dspace.azti.es/handle/24689/1880
ISSN: 0025-326X
E-ISSN: 1879-3363
Funder: Prevention and Environment Department of the Port Authority of Bilbao
University of the Basque Country
Appears in Publication types:Artículos científicos



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