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Joanne Stewart, Hope College
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Last seen: 1 week 3 days ago
Joined: 11/17/2007 - 11:05am

need help with aqueous vanadium chemistry

Dear VIPEr friends,

One of our summer research students is collecting isotopes from an accelerator to be used for potential medical purposes. He would like to know if there's a way to pull vanadium out of the aqueous mixture. There's a laundry list of other possible products: Mn, Sc, Co, Cr, Ti, Ar, Fe, and Si.

So flex those qual muscles and let me know what you think!

Thanks,

Joanne

Kyle Grice, DePaul University
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Last seen: 3 days 8 hours ago
Joined: 07/22/2010 - 5:29pm

Hi!

Vanadate is a phosphate mimic. I think you can precipitate it out with Calcium or other ions that also form insoluble species with phosphates. 

There's got to be some good info out there, but I am not super familiar with the area. 

Kyle 

Joanne Stewart, Hope College
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Last seen: 1 week 3 days ago
Joined: 11/17/2007 - 11:05am

That's an interesting idea. The student was thinking he could probably oxidize to +5, but I was thinking V2O5, not VO43-. I like that. Wonder how you get it? We will look into that!

Patrick S. Barber , Williams College
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Last seen: 1 year 2 months ago
Joined: 03/01/2015 - 6:55am

Hi Joanne,

You might want to look into the separation through selective coordination.  Vanadium is one of the big UO22+ competitors in seawater when using amidoxime ligands for the extraction of uranium from seawater.  You can probably easily functionalized a resin with this group and run your solution through it to separate out the vanadium.  I'm not sure of the speciation of the vanadium in your solution, but we were able crystallize out a complex from a very dilute solution starting with V2O5 (paper).

Good luck and let us know how it goes!

Patrick