High-resolution examination of the colloidal speciation of cadmium in estuarine waters (Penzé, NW France)
| Autor: | Virginie Tanguy, Matthieu Waeles, Ricardo Riso |
|---|---|
| Přispěvatelé: | Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
media_common.quotation_subject
chemistry.chemical_element High resolution Oceanography Chloride Colloid medicine Environmental Chemistry [CHIM]Chemical Sciences Colloids Water Science and Technology media_common Cadmium geography geography.geographical_feature_category ACL Estuarine chemistry Estuary General Chemistry Annual cycle 6. Clean water Salinity Speciation chemistry Environmental chemistry [SDE]Environmental Sciences medicine.drug |
| Zdroj: | Marine Chemistry Marine Chemistry, Elsevier, 2014, 167 (SI), pp.71-81. ⟨10.1016/j.marchem.2014.05.001⟩ |
| ISSN: | 0304-4203 |
| DOI: | 10.1016/j.marchem.2014.05.001⟩ |
| Popis: | International audience; We report here for the first time a high-resolution study of the colloidal cadmium speciation with seasonal variations in estuarine waters. Over this 1-year study, seven colloidal fractions below 0.45 pm were analysed at 6 stations along the salinity gradient of the Penze estuary, with the aim to provide some insights into the mechanisms that control Cd concentrations and behaviour under estuarine mixing. A classic and strong positive Cd anomaly occurred at mid-estuary throughout the seasonal cycle. This anomaly corresponded essentially to an input of low molecular weight (LMW) compounds, i.e. in the size range 5-50 kDa, arguing that besides the usual hypothesis of Cd complexation with chloride, it is also of fundamental importance to consider the role of colloidal organic species in favouring Cd mobilisation. The colloidal repartition of Cd being notably different to that of humic substances, the ligands involved in Cd complexation are more probably of allochthonous origin. Over the annual cycle, total dissolved Cd ( |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect