A Review of the Use of Ion Exchange for Molybdenum Recovery in Russia

Kholmogorov, A. G.; Кононова, О. Н.; Panchenko, O. N.

doi:10.1179/000844304794410011

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Form Of Mo Existing In Solution Containing So 4 2-1

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2015

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“…The peaks can be attributed to the vibration of Mo-O-S bond as [Mo 2 O 5 (SO 4 ) 2 ] 2-or [MoO 2 (HSO 4 ) 4 ] 2-forms in the solutions [15][16][17]. But only the peaks at 1111 and 1045 cm -1 can be identified in IR spectrum of the resin loaded at pH = 0.06, which indicates that the distribution ratio of the heteropoly acid anions changes with pH decreasing as sulfuric acid is a dibasic acid, and its secondary ionization constant is only 0.01 [18].…”

Section: Form Of Mo Existing In Solution Containing So 4 2-mentioning

confidence: 98%

Existing form of Mo(VI) in acidic sulfate solution

et al. 2015

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The existing form of molybdenum in acidic sulfate solution was studied by means of ion exchange, infrared (IR) spectra and X-ray photoelectron spectroscopy (XPS). The results indicate that the anionic molybdenum species are predominant in acidic sulfate solution, and Mo(VI) can combine with sulfate radical to form heteropoly acid anions [Mo 2 O 5 (SO 4 ) 2 ] 2-and [MoO 2 (HSO 4 ) 4 ] 2-. With the decrease in solution pH from 1.92 to 0.06, the existing form of Mo(VI) changes from Mo 7 O 21 (OH) 3 3-to [Mo 2 O 5 (SO 4 ) 2 ] 2-and then becomes [MoO 2 (HSO 4 ) 4 ] 2-, which results in the decrease in the resin adsorption capacity for molybdenum.

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Section: Form Of Mo Existing In Solution Containing So 4 2-mentioning

confidence: 98%