eidolonicaurum - 2-1-2014 at 09:55
I have a solution which contains vanadyl sulphate, zinclsulphate and sodium sulphate. How could I remove the vanadium (in any form!) from the
solution? I obtained the solution by dissolving vanadinite in conc. nitric acid, then adding sodium hydroxide to precipitate the lead out, then
reduced it with zinc and acid. Is it possible to separate the vanadium without resorting to fractional crystallisation? Im not fond of it, and the
solution tends to end up full of dust when it do it.........
Any ideas?
blogfast25 - 2-1-2014 at 12:35
It should be possible to oxidise vanadyl to vanadium pentoxide in near neutral conditions, with hydrogen peroxide:
H2O2 + 2 H+ + 2 e- === > 2 H2O ... E = + 1.776 V
2 VO(2-) + 3 H2O === > V2O5 + 6 H+ + 10 e- ... E = - 0.957 V
The hydrated V2O5 can then be filtered off.
[Edited on 2-1-2014 by blogfast25]