--- In
Homebrew_PCBs@yahoogroups.com, Stefan Trethan
<stefan_trethan@g...> wrote:
> >
> > NaHCO3 - baking soda
> > NaCL- from HCL and NaHCO3 reaction
> > Cu - copper
> >
> >
> > and drop off at your local hazardous waste facility.
> >
> >
> > Is my chemistry correct ?
> >
>
> you probably have no metallic copper, more like CuCl2 and CuCl....
>
> the acid is definitely no problem, neutralize with anything...
>
> The H2O2 degrades to pure water, the oxygen goes in the air in a
matter of
> hours/days.
>
> As we have established before the copper compounds are the problem,
> possibly killing
> the bacteria in the wastewater plant.
>
>
> Best idea in my opinion is neutralize, and then let evaporate
without
> danger.
>
> Can lime be used for neutralizing it?
> slaked lime like you use for construction i mean.....
>
> ST
Heck, if you just leave the stuff outside to evaporate, all you would
have left is some salts and the residual copper.
That would be in such small amounts that you could scrape that into
your baggie and give to the hasmat disposal.
But, I'm thinking that here in the US, we use copper pennies and
copper water pipe so we probalby dump more copper into the waste
stream than all the pcb houses put togehter.
Dave