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Metal early diagenesis and pollution in the tidal flats of the Marennes Oleron Bay: Application of metal sequential extraction ArchiMer
El Ghobary, H; Latouche, C.
The study of metal partition patterns in the tidal flats of the Marennes Oleron Bay shows that the metal partition patterns in the superficial sediments indicate that the major part of the mobile fraction of metals is associated with Fe-Mn oxides. The metal fractions associated with organic matter are relatively small. As depth increases, the decrease of metal reducible fraction is evidence of oxide dissolution under reducing conditions. The increase of metal sulfide-organic fraction with an increasing depth of burial, supports the idea of metal sulfide formations. Calculations show that the total sulfur in the sediments is in excess with respect to iron extracted by the hydrogen peroxide treatment. This assumes the existence of Fe fraction as FeS sub(2)...
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Ano: 1982 URL: http://archimer.ifremer.fr/doc/00246/35718/34227.pdf
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