Fig. 1. Distribution diagram of molybdenum (VI) species in aqueous solution as a function of pH. [Mo]total = 0.01 M.
Fig. 2. Distribution diagram of tungsten (VI) species in aqueous solution as a function of pH. [W]total = 0.01 M.
Fig. 3. Effect of equilibrium pH on the extraction of Mo(VI) and W(VI) by Alamine 308. Condition: [Mo(VI)] = [W(VI)] = 1 g/L, [Alamine 308] = 0.1 M, diluent: kerosene, O/A = 1:1.
Fig. 4. Effect of equilibrium pH on the extraction of Mo(VI) and W(VI) by TEHA. Condition: [Mo(VI)] = [W(VI)] = 1 g/L, [TEHA] = 0.1 M, diluent: kerosene, O/A = 1:1.
Fig. 5. Effect of equilibrium pH on the extraction of Mo(VI) and W(VI) by TOP. Condition: [Mo(VI)] = [W(VI)] = 1 g/L, [TOP] = 0.1 M, diluent: kerosene, O/A = 1:1.
Table 1. Effect of solution pH on the separation factor between Mo(VI) and W(VI) by several extractants
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