netneut
finishing.com -- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing


Finishing.com has been free for 22 years,
but without net neutrality we could soon
cease to exist. Do us a solid, click on
the banner, and contact congress today!
HomeFAQsBooksHelpWantedAdvertiseForum
topic 107

Solubilities of metal precipitated with DTC (dimethyl dithiocarbamate)


(1995)

I am interested in finding the solubilities of heavy metals in the presence of DTC, particularly trivalent chromium, silver, selenium and tin. I understand that the metal precipitates formed in the presence of DTC are NOT sulfides, so it is reasonable to assume the solubility of the precipitates differs from that of the corresponding metal sulfide salts. Chemical vendors that I am working with have not offered solubility data or stated what can be achieved with DTC and similar organic sulfide chemistries.

Robert D. Edelman - Environmental/Process Engineer
- Bedford, Massachusetts


O&M of Surface Finishing Wastewater Treatment Systems
Clarence Roy

 

Hi, Robert.

DeGussa offers TMT-15, another organic sulfide, and their literature includes a sprinkling of test results.

"Heavy Metal Removal Using Dithiocarbamates" by R.E. Wing and W.E. Rayford (Plating & Surface Finishing, Jan. '82) has some useful data too.

Ironically, Tom Pullizzi and I were involved just this month in a treatability analysis for nickel mixed with a soak cleaner, and we found sulfides and DTC worthless for this particular mix. Low pH chelate-breaking was the only thing that worked.

After the massive fish kill in the White River in Indiana, allegedly caused by grossly excessive DTC use in the plating shop of a car manufacturer, please be very careful with DTC and seek substitutes if possible. Good luck.

Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey



This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Q or A to THIS thread START a NEW THREADView This Week's HOT TOPICS

Disclaimer: It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices


©1995-2017 finishing.com     -    Privacy Policy
How Google uses data when you visit this site.