Figure 2 Concentrations of critical and technology metals in bauxite-related samples. Figure 3. Concentration of rare earth elements (REEs) in the red mud sample. Figure 4 Distribution of toxic elements in red mud. 3.3 Morphological Characteristics of Red Mud FE-SEM images clearly illustrate the morphology of red mud samples collected from Refinery A, B and C. Red mud samples from Refinery A contain irregularly shaped particles that range 122
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