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| From [log in to unmask] Fri Jun 7 09: |
43:44 1996 |
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Keith, I talked with our chemist here. He says DTC is the best thing
around for getting rid of metals. Lower limit on pH is 9.0, however.
Lou Hart
.
On Tue, 4 Jun 1996 [log in to unmask] wrote:
>
> Dear Fine People:
>
> The precipitant we use in our industrial wastewater treatment plant to remove
> chelated metals from our rinse waters is dithiocarbamate, or DTC. DTC has
> the unfortunate ability to form the undesirable (read: strictly regulated)
> byproduct/decomposition product CS2 (carbon disulfide), especially under
> acidic conditions. Can anyone offer help in any of the following areas
> regarding this dilemma?
>
> 1. DTC management to minimize/eliminate CS2 formation? Preventing DTC
> bearing waters from experiencing acidic conditions seems to be one of the
> more obvious interventions.
>
> 2. DTC variants which cannot form CS2 (if they exist)?
>
> 3. Alternatives to DTC? We have tried several, none seems to match DTC's
> ability to precipitate a highly chelated, high lead bearing wastewater stream
> to under 0.2 ppm lead consistently.
>
> 4. Easy test kit/method for CS2?
>
> Thanks for your help
>
> Keith Perrin,
> Compliance Specialist
> Printed Circuit Corp.
>
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