Abstract
Millions of tons of manganese nodules occur in both marine and fresh water sediments, waiting to be developed as the mineral resources of the near future. In addition, their relatively high surface area and transition metal oxide content have also aroused interest in their catalytic and sorptive properties. Several processes using manganese nodules have already been proposed and tested for reactions in the petroleum industry and pollution control plants. Manganese nodules have been found to be as effective as some commercial catalysts and adsorbents in reactions such as oxidation, reduction, decomposition and demetallation. This implies that manganese nodules constitute a vast source of inexpensive catalysts and adsorbents, the use of manganese nodules for these purposes is reviewed in this article.
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