plating, anodizing, & finishing Q&As since 1989
Hexavalent chromium removal by precipitation
To remove hexavalent chromium precipitation technique is used. In this process lot of sludge is generated. To improve the efficiency without much increase in the sludge quantity is there any technique.Nanga Siva Prasad Reddy
- Kurnool, Andhra Pradesh, India
Hexavalent chromium cannot be effectively precipitated per se,, it must first be reduced to trivalent chromium. Without details of your present process, how can anyone propose improvements?
From the finishing.com Home page (www.finishing.com/), a Search for chromium treatments included the responses below. Please read them, then re-submit your question with all relevant details (source of Cr+6, influent concentration & gallonage, all treatment chemicals, pH and ORP setpoints, reaction times, settling & filtration means, effluent concentration, any complicating factors).
Activated carbon or ion exchange to remove Chromium 6 www.finishing.com/98/08.shtml
Reducing Cr concentration in effluent www.finishing.com/13/47.html
Heavy metals concern www.finishing.com/188/99.shtml
treatment plant treating CR6+ www.finishing.com/200/94.shtml
Electro-coagulation process www.finishing.com/143/79.shtml
Change Hexavalent to trivalent chrome at high PH using sodium metabisulfite? www.finishing.com/122/15.shtml
Removal of Heavy Metals www.finishing.com/217/70.shtml
Removal of Chromium VI www.finishing.com/202/34.shtml
- Goleta, California
Finishing.com honored Ken for his countless carefully researched responses. He passed away May 14, 2015.
Rest in peace, Ken. Thank you for your hard work which the finishing world, and we at finishing.com, continue to benefit from.
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