Homebrew PCBs

pcb.easy wrote:
> Adam,

> Can I dry the copper hydroxide? How should it be stored?

Same as any chemical. In a clearly labeled container and away from 
children who likely to try eat it. Its a copper compound.
Label your chemicals for other peoples sake.

> My goal here is to reduce the volume of waste by extracting the
> water, and identify the substance to the hazard waste facility.

yes, your on track. One way is to have a small bucket or pail with a lid 
that you can periodically dump in sludge. Keep the bucket open and by 
time you ready to dump more sludge the previous lot will be dry.
You've already done the hard work of neutralizing, precipitating and 
removing the bulk of liquid (NaCl/NaOH solution).

Adam