Role of organic matter in the accumulation of platinum in oceanic ferromanganese deposits |
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Authors: | I V Kubrakova I Ya Koshcheeva O A Tyutyunnik A M Asavin |
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Institution: | 1.Vernadsky Institute of Geochemistry and Analytical Chemistry,Russian Academy of Sciences,Moscow,Russia |
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Abstract: | In order to elucidate possible processes leading to platinum accumulation in ferromanganese deposits, we analyzed published
data on the interaction of dissolved platinum species in different valence states with iron and manganese oxyhydroxides under
oceanic conditions and experimentally studied the kinetics of sorption of inorganic and organic complexes of platinum (II)
and platinum (IV) on synthetic iron and manganese oxyhydroxides and natural materials (marine colloids, and ferromanganese
crust samples). The role of dissolved and suspended particulate aquatic organic matter in the sorption accumulation of platinum
was evaluated. Possible reasons for the preferential (compared with other noble metals) accumulation of platinum in oceanic
ferromanganese deposits were discussed. |
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