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The simultaneous transformation and dissociation of minerals containing iron in reductive Bayer digestion of bauxite are important to separate iron minerals from red mud and thus reduce the waste solid disposal in alumina production. In order to better understand the reaction mechanism of iron and hematite in sodium aluminate solution, the phase composition, valence variation and micro-morphology...
Hyperaccumulator plants (“metal crops”) can be used for selective extraction of Ni from low-grade resources, thereby producing a high-grade “bio-ore”. This so-called agromining (or phytomining) technology involves farming select metal crops on ultramafic soils, mineral wastes, or overburden that are sub-economic Ni resources for conventional extractive technology. Key to profiting from agromining...
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