• Resources Recycling
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• v.27 no.4
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• pp.44-49
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• 2018

$MoO{_4}^{2-}$ is the stable chemical species of Mo(VI) in alkaline solution. In the pH range of 2 to 6, condensation polymerization between $MoO{_4}^{2-}$ and hydrogen ion results in the formation of various polyanions of Mo(VI). Polycations of Mo(VI) begin to form when solution pH is less than 2. As the concentration of inorganic acid increases, polycations of Mo(VI) can react with the anion of the inorganic acid, resulting in the formation of heteranions of Mo(VI). The distribution of Mo(VI) species at pH < 6 depends on the concentration of Mo(V) and inorganic acid. In order to analyze the solvent extraction and ion exchange data on Mo(VI) from concentrated inorganic acid solution, it is necessary to elucidate the nature of Mo(VI) complexes.