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- W2008041541 abstract "Abstract The Seine estuary possesses a heavily industrialised catchment area that contrasts significantly with that possessed by the smaller Authie estuary. For both of these northern French estuaries, Pb isotopic compositions and concentrations have been determined on specimens of Hediste diversicolor (ragworms) and on HCl leachates performed on related mudflat sediment. Three sampling campaigns were completed in 2003. As expected, the reactive Pb obtained by 1 M HCl leaching, shows higher concentrations and a more anthropogenic signature in samples from the Seine estuary than in samples from the Authie. However, neither of the two sites is free from the influence of anthropogenic Pb. Possible contaminant sources are discussed through comparisons with previously published data. For the more highly contaminated Seine estuary, most of the ragworm Pb signatures are similar to those of the sediments. In contrast, ragworms from the Authie site exhibit a higher proportion of anthropogenic Pb than the corresponding sediments. Various hypotheses are discussed to explain this significant discrepancy: (1) analytical artifacts, (2) migration of ragworm populations, (3) diet and feeding behaviour, and as the most likely explanation (4) an unsuitable leaching method for the extraction of bioavailable Pb. The possibility of using Pb isotopes as a tool for bioavailability studies on sediments or soils is discussed." @default.
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- W2008041541 date "2008-10-01" @default.
- W2008041541 modified "2023-10-06" @default.
- W2008041541 title "Bioavailability of sediment-borne lead for ragworms (Hediste diversicolor) investigated by lead isotopes" @default.
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- W2008041541 doi "https://doi.org/10.1016/j.apgeochem.2008.04.012" @default.
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