The incorporation of minor transition metals into marine manganese nodules |
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| Authors: | Noburu Takematsu |
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| Institution: | (1) The Institute of Physical and Chemical Research, Hirosawa 2-1, Wako-shi, 351 Saitama, Japan |
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| Abstract: | The mechanisms of incorporation of minor transition metals into marine manganese nodules are discussed on the basis of differential chemical leaching.A small portion of iron and manganese in deep-sea nodules was dissolved in dilute acetic acid. Hydrogenous cobalt and nickel in nodules were also slightly leached with the acid solution, while 50–60 % of hydrogenous copper and zinc were leached. This difference suggests that the greater parts of hydrogenous cobalt and nickel are present in the lattices of manganese oxide phases, while the major parts of hydrogenous copper and zinc are present in the sorption sites of manganese oxide phases.The enrichment of minor transition metals in manganese nodules may be controlled by their substitution for manganese atoms in manganese oxide lattices after their sorption on manganese oxide phases. |
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