[Jewelry making - Article 00532] - Re: [Orchid] Bombing recipes?

[Peter W . Rowe]

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>     Your recall is good. That is the technique for disposal/
>     neutralizing a quart of plating solution. 1 gallon of chlorine
>     bleach to 1 quart of cyanide based solution to 30 gallons of water,
>     well stirred and left to sit covered overnight for the reaction to
>     complete. At that point, the reaction products (according to my
>     source, an older paper by PM refining) are safe to add to the
>     municipal waste water system. 

    thanks Paul. 

    Did that paper mention anything about removal of metals from the
    solution? I don't recall, or know enough chemistry to be sure. I'd
    sort of expect the reaction to precipitate insoluable metal salts
    (chlorides), so the solution would be free of the metals. Is that
    true? I don't know, for that matter, whether all the appropriate
    chlorides are actually insoluable... 

Peter
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