• To participate in the 911Metallurgist Forums, be sure to JOINLOGIN
  • Use Add New Topic to ask a New Question/Discussion about Thickening, Filtering or Tailings and Water.
  • OR Select a Topic that Interests you.
  • Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent).
    Using Add Reply allows you to Attach Images or PDF files and provide a more complete input.
  • Use Add Comment = to comment on someone else’s Reply in an already active Topic/Discussion.

Acid Drainage treatment with limestone (9 replies)

David Kano
9 months ago
David Kano 9 months ago

Does anyone has information about acid mine drainage neutralization using limestone? The lab recommended lab tests? Information’s about column design? I would appreciate your help.

9 months ago
Obergruppenfuhrer 9 months ago

Here is a paper that I read some time ago hosted on the USGS website. It should be a start for you


Victor Bergman
9 months ago
Victor Bergman 9 months ago
Carmen Ibanz
9 months ago
Carmen Ibanz 9 months ago

If you want to repeat what thousands of people did before you, you can conduct another test. The pH will not increase above ca. 7.5 – 8 and it will take about 8 – 14 hours until you get the final pH. Always the same results without statistically significant differences. I will send you about 150 references which you can use to come up with your results. Also look to the "integrated limestone process".

9 months ago
Gruppen 9 months ago

Previous comment suggests that limestone treatment of AMD could well be standardized, taking profit of other well-accepted methods (BC and ISO on testing, see also GARD guide). However, one of the most important points is water monitoring, upstream and downstream. Not only pH but also conductivity/salinity, suspended matter (or turbidity) and the most critical metals/metalloids...

Helena Russell
9 months ago
Helena Russell 9 months ago

I have run membrane systems on AMD at pH 1-5 for 30 years. You want to run the membrane at low pH when iron, aluminum and other sparingly soluble metals (pH 7>) are still in solution. The membrane concentrate is then supersaturated and easily precipitates with much less lime than if one simply limed the feed (50 to 90% less lime depending upon the amount of co-precipitation that takes place.

Ace Levy
9 months ago
Ace Levy 9 months ago

Is the purpose of your question to develop some sort of study such as column tests or is it to design and build a real passive system to treat mine drainage?

9 months ago
Oberfuhrer 9 months ago

I can send you a rough presentation for a preliminary idea run a quick test and then went on to do some with math for limestone addition.

Maya Rothman
9 months ago
Maya Rothman 9 months ago

Yes send me some details of the analyses, volumes, goals resource recovery (copper) then discharge or reuse of membrane permeate.

Carl Jenkins
9 months ago
Carl Jenkins 9 months ago

Limestone is not the magic bullet that a lot of people think it is for passive treatment of acid drainage due to the potential of sulfate armoring. Are you looking at a passive or active system? There was a good paper on active systems using lime and limestone last week at the MEND conference.

Please join and login to participate and leave a comment.