×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

successful case of groundwater remediation for hexvalent chromium

successful case of groundwater remediation for hexvalent chromium

successful case of groundwater remediation for hexvalent chromium

(OP)
Is there any successful case of remediation project for groundwater contamination with metals primary with  chromium (Cr VI)?
 
Thanks for all feed back!

RE: successful case of groundwater remediation for hexvalent chromium

You may want to investigate the possibility of using activiated carbon impregnated with zero valent iron, then treating the effluent via traditional lime neutralization with polymer settling agents.  The zero valent iron will reduce Cr(IV) to Cr(III), apparently, and then the trivalent chromium is easier to precipitate.  (I am not an expert on this topic, but I have come across the idea in literature reviews several times.)

RE: successful case of groundwater remediation for hexvalent chromium

Zerovalent iron is the sure way to reduce Cr(VI).  I've also read many papers and done some research with organic humic compounds, (quinones, etc.), which are regularly released by soil bacteria.  However, this needs to be a completely anaerobic system.  The presence of oxygen will return Cr(III) to Cr(VI).  As for activated carbon, it works.  I might attempt a zeolite, though.  Zeolites have porosity similar to activated carbon, but they also have Cation exchange.  Dr. Robert Bowman and St. Cloud Mining Co. have developed a iron impregnated modified zeolite for this very purpose, a reactive barrier.  

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources