Abstract
Due to the usually low grades of metals in natural ores, huge amounts of solid wastes are annually produced from various mining/milling processes. Both these processes and the types of ores in question determine the proper waste disposal strategy. In yellow cake (U3O8) production, extractive hydrometallurgical processes along with oxidizing, acidic reagents are being widely used. Uranium ores usually contain substantial amounts of pyrite (FeS2), sometimes up to 7%w. This compound undergoes acid‐producing reactions, which acidify the porewater of abandoned uranium tailings. Perturbation caused by aggressive mining/milling operations combined with highly acidic environments enhance the metal mobilization which is considered as a direct pathway for ground water contamination. This investigation suggests a plausible mechanism for developing a better understanding of solid waste/ground water interactions. Using both batch and column tests, the slow acidification process was measured by using porewater pH as an...
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