Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

----- Original Message -----
From: "Adam Seychell" <a_seychell@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Tuesday, October 07, 2008 9:13 AM
Subject: Re: [Homebrew_PCBs] Re: Getting ready to switch from Ferric
Chloride to ???????


> Howard Hansen wrote:
>> In this area they have a hazardous waste disposable event once a year.
>> You might ask around to see when a hazardous waste disposable event is
>> scheduled for your locale.
>>
>> Howard
>
> Spent FeCl would be considered "industrial waste", which is apparently
> not accepted by the free annual hazardous waste disposal event organised
> by my city council.
> For volumes < 25 liters there is the lime and cement trick. I have about
> 10kg of dried salts I've accumulated over the years, about 1/2 is copper
> salts.
>
> If you have > 25 liters then it may be best to take it to a chemical
> disposal yard for a fee.

The occasional pint or two won't matter. Ferric chloride is used for water
treatment, and the amount of copper is negligible, compared to what must get
into the water from the copper pipes used in plumbing.

Leon