Leaching kind of implies putting pm's in solution to concentrate and isolate, i.e. dissolving. So how will you get it back out of solution?
Like getting dissolved gold out of a thiosulphate solution. if you don't know how, then why dissolve it and not just give it away? Unless you have a use or customer for pm's dissolved in thiosulfate.
I read somewhere to cement dissolved silver on steel wool, but how exactly; at which pH or with which pretreatments or additions, no idea.
To me it sounds like you put your money in a safe without knowing the combination of the safe?
That should be check number one, right?
