How can one reclaim isotopic cadmium from a solution of acid, i.e. H2SO4 or HCl etc.?
Thank you everyone for the discussion.  Sorry, I have been away for a few days, so was unable to follow up.
Reading the ideas, it is a toss up on a procedure.  Scraping the Cd off of an Aluminum electrode might work, but Al contamination would be very bad for the laser oscillation.  It might work for awhile, but would die from contaminants in short order.
The Al oxide, though only a molecular layer, is extremely tough and can withstand a great deal of heat and abuse.  I make Aluminum edge-wound voice coils for my speaker company and we depend on the oxide layer to act as an insulator from winding to winding.  Our coils can withstand 600 degrees and will melt before they fail.
Stripping the oxide gives you only a few seconds before it reforms in the normal atmosphere.  Any other thoughts?
Perhaps reduction of the salt by heating?
Thanks
Dale