Fwd: [dorkbotpdx-blabber] printed circuit board chemistry

[Eric Garner]

the 3 most common etchants are ferric chloride, sodium or ammonium
persulphate, and HCl/H202, of the three only the HCl/H2O2 is
theoretically reusable. FeCl and the persulphates i usually tale to
the household hazardous waste collection sites at the Metro waste
transfer stations.


---------- Forwarded message ----------
From: Daniel Johnson <teknotus at gmail.com>
Date: Wed, Feb 25, 2009 at 10:27 AM
Subject: Re: [dorkbotpdx-blabber] printed circuit board chemistry
To: "A discussion list for dorkbot-pdx (portland,  or)"
<dorkbotpdx-blabber at dorkbot.org>


> I think even more than recovering removed copper from solution, most of us
> would just like to know the proper (bonus: cheap+easy) way of
> disposing/recycling of waste from this process without killing
> fish/trees/babies.

I just got this back from my friend.

"What I first need to know is what type of solution you are using to
dissolve the copper. If the chief concern is killing
fish/trees/babies, then there are probably more chemicals of concern
than just the copper. I don't think RETRIEVING the copper for reuse is
hugely practical.  There are simple ways to remove or complex copper
but I can't help until I have the solution components. If you know the
NAMES of the solutions, they most likely contain an analyte list
(ingrediant list) on the back, and it is required to have an
associated MSDS (Material Safetey Data Sheet) online. "
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-- 
--Eric
_________________________________________
Eric Garner