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C18 Sep-Pak extractable dissolved organic copper related to hydrochemistry in the North-West Mediterranean ArchiMer
El Sayed, Mohamed A.; Aminot, Alain.
Extractable organic copper using C18 Sep-Pak cartridges was investigated in seawater after laboratory experiment showed that the (C18 Sep-Pak) cartridges were reliable, in open and coastal waters with normal levels of dissolved organic carbon, for the separation of a specific fraction of organo-copper complexes.Given that the Sep-Pak cartridges retain the hydrophobic fraction of the dissolved organic matter, this extraction technique was applied for studying the characteristics of this particular hydrophobic dissolved organic copper fraction (hDOCu) in the north-western Mediterranean waters. Surface distribution of hDOC is influenced by organic matter input from the river Rhone and its estuary as well as the physical processes affecting the primary...
Tipo: Text Palavras-chave: Mediterranean sea; Seawater; Dissolved organic matter; Copper compounds.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/2000/publication-1681.pdf
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La biodéposition dans les aires ostréicoles. Son rôle dans la concentration de la matière organique et de contaminants potentiels. Son impact sur le sédiment. ArchiMer
Martin, Jean-louis; Sornin, Jean-marc; Delmas, Daniel; El Sayed, Mohamed A.; Berthet, Brigitte.
Au cours de cette étude, nous avons étudié l'impact de la biodéposition sur les bassins conchylicoles. La biodéposition constitue un "concentrateur" de particules fines au niveau du sédiment. Cet impact est particulièrement évident sur les sédiments sableux et concerne la granulométrie, les taux de matière organique, la concentration des métaux et des hydrocarbures. Une étude comparée est faite entre estran sableux et bassin de type "claire" à sédiment argileux. L'impact de la biodéposition sur les sédiments sableux n'est pas irréversible. Le bassin fermé avec un sédiment argileux agit comme un concentrateur-rétenteur de particules et des contaminants potentiels. Ceci souligne le rôle "tampon" des marais maritimes entre milieu continental et milieu marin.
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Ano: 1989 URL: http://archimer.ifremer.fr/doc/00076/18757/16327.pdf
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