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- W87664762 abstract "The biodissolution of copper, nickel and cobalt front the Indian Ocean manganese nodules has been investigated in presence of pyrite and elemental sulphur using Thioba-cillus ferrooxidans(Tf) and Thiobacillus thiooxidans (Tt) as the microorganisms. The leaching of manganese nodules proceeds with reduction of Mn4+ to Mn2+ by ferrous ionsgenerated from pyrite and H2SO3, from that of sulphur by bacterial action. Breaking the lattice structure of manganese and iron based minerals like todorokite, birne-ssite, lithiophorite and goethite by chemico-bacterial action, releases the valuable metals such as copper;nickel and cobalt thereby dissolving them in the aqueous solution.Recovery of the metals was highest for finer size (-75,um) fraction of the nodules. For an instance, in presence of 10% pyrite at 5% pulp density and pH 2.0, 97% Cu, 85%a Ni, and 55% Co were leached in 50 days. With the particle size of -300 +200Um, the metal recoveries at 30°C were 81% Cu, 67% Ni and 39% Co in 50 days tune in presence of pyrite. Under these conditions 61% Cu, 58% Ni and 26% Co diss- olution was observed in presence of sulphur Raising the temperature from 20-35°C increased the metal recovery." @default.
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- W87664762 date "2000-11-01" @default.
- W87664762 modified "2023-09-23" @default.
- W87664762 title "Recovery of Valuable Metals from Sea Nodulesin Presence of Pyrite and Sulphur" @default.
- W87664762 hasPublicationYear "2000" @default.
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