External sources vs internal processes: What control inorganic As speciation and concentrations in the Penzé estuary?
| Autor: | Jean-Yves Cabon, Ricardo Riso, Pascal Salaün, Matthieu Waeles, Jennifer Vandenhecke |
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| 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), Scholl of Environmental Sciences, University of Liverpool, Chimie, Electrochimie Moléculaires et Chimie Analytique (CEMCA), Institut Brestois Santé Agro Matière (IBSAM), Université de Brest (UBO)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC) |
| Rok vydání: | 2013 |
| Předmět: |
010504 meteorology & atmospheric sciences
chemistry.chemical_element Seasonal variations 010501 environmental sciences Aquatic Science Oceanography 01 natural sciences Arsenic chemistry.chemical_compound Water column Adsorption 14. Life underwater Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences Arsenite geography geography.geographical_feature_category Ecology Estuary Arsenate Particulates 6. Clean water Salinity chemistry 13. Climate action Environmental chemistry [SDE]Environmental Sciences Environmental science Inorganic species |
| Zdroj: | Journal of Marine Systems Journal of Marine Systems, Elsevier, 2011, 109-110, pp.S261-S272. ⟨10.1016/j.jmarsys.2011.09.008⟩ |
| ISSN: | 0924-7963 |
| DOI: | 10.1016/j.jmarsys.2011.09.008 |
| Popis: | International audience; Over one year study (12 campaigns), particulate arsenic and dissolved inorganic arsenic (total inorganic Asi and arsenite As(III)) levels were determined along the whole salinity gradient of the Penzé estuary (12 stations) in Brittany (France). Concentrations, in the range 2-26 nM and 3-56 μg g− 1 for dissolved inorganic and particulate arsenic, respectively, were relatively high in comparison to pristine systems and were attributed to pig and poultry farming activities taking place in the catchment area. Our results show that variations of dissolved inorganic and particulate arsenic up to mid-estuary were significantly linked to fluvial inputs, these latter being controlled by water discharge and precipitations. Arsenite variations over a large salinity range (S > 4) were controlled by those of the marine end-member mainly through bacterial processes. Removal of dissolved species within the water column by adsorption on oxide material was found to be minimal while arsenic fluxes from the sediment control arsenate and arsenite levels in the upper part of the estuary. |
| Databáze: | OpenAIRE |
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