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topic 24103

Treatment of chrome waste from chromic acid manufacturing



A discussion started in 2003 but continuing through 2018

(2003)

Q. Treatment of waste obtained while manufacturing chromic acid (Chromium Trioxide. Chromic acid is manufactured from sodium bicromate).

Please let us if we can treat the waste obtained from chromic acid plant

Munish Kapoor
Chemical manufacturer - Ludhiana, Punjab, INDIA


(2003)

A. You try to search the method of ion exchange.

SE DO JANG
- Korea


(2003)

A. Mr Kapoor,

Please follow the same process plating units use for hexavalent Cr bearing waste water, and if you wish to recover the water and maintain zero discharge status, use membranes to remove final traces of all the pollutants.

Regards,

asif_nurie
Asif Nurie
- New Delhi, India

With deep regret we
sadly advise that
Asif passed away

on Jan 24, 2016



May 16, 2008 -- this entry appended to this thread by editor in lieu of spawning a duplicative thread

Q. Wish to know treatment of waste generated from manufacturing of sodium dichromate and chromic acid

Pradyot Pise
chemical manufacturer - Nagpur, Maharashtra, India



May 9, 2018

Q. How do I dispose of potassium dichromate, sulfuric acid mixture?

June Lilian
- Darwin, Australia


May 2018

A. Hi June. The answer depends on whether you are a chemistry teacher at a school, trying to dispose of a few test tubes or a beaker; or whether you are from a plating shop using this solution; or from a manufacturer of potassium dichromate chemicals.

Potassium dichromate is toxic and carcinogenic and must not only be treated properly for disposal, but this usually must be done in accordance with specific regulations depending on the industry that you are in.

Topics 12215 and 33822 and 45227 address the technology/methodology of chrome wastewater treatment if that is your main interest. Good luck.

Regards,

pic of Ted Mooney
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey
Striving to live "Aloha"



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