Homebrew PCBs

Ok,

I finally got around to reading the thread about muriatic acid and wondered
if I could do something with the spent FeCl I have been accumulating.  I was
planning on bringing it to the annual domestic waste collection done by the
city, but I'd prefer to recycle it if at all possible.

So I googled and found this link:
http://www.qsl.net/iz7ath/web/02_brew/14_howto/02_clor/index.htm

This guy regenerates ferric chloride, but that contradicts this link from
the muriatic acid thread:
http://www.smallsolar.org/workshop/etchant/index.htm

- Copper Chloride has one important benefit that the other commonly used
etchant chemicals (Ferric Chloride and Ammonium Persulphate) don't have:
when it "wears out" it can be regenerated.

So, before I nuke my back yard, can I regenerate ferric chloride?  And if
so, what would be a 'relatively' safe procedure?

Robert
:)