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ARD AMD Acid Drainage Using Limestone (5 replies)

Victor Bergman
11 months ago
Victor Bergman 11 months ago

Hello, I need input about ARD & AMD and regards to Acid Drainage treatment with limestone. Am looking for information about acid mine drainage neutralization using limestone? What oratory tests do you recommend? Any details about column design? 

John Koenig
11 months ago
John Koenig 11 months ago

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

Also The International Network for Acid Prevention (INAP) guide is very complete as well. 

See section 7 for infos about passive treatment and related references. http://www.gardguide.com/index.php?title=Chapter_7 and http://mine-drainage.usgs.gov/pubs/ICARD_2000_Sibrell.pdf

Bob Mathias
11 months ago
Bob Mathias 11 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 statisticaly significant differences. Send my a PM and I will send you about 150 references which you can use to come up with your results. Also look to the "integrated limestone process".

Here I suggest that limestone treatment of AMD could well be standardised, taking profit of other well-accepted methods (BC and ISO on testing, see also GARDguide). 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.

Maya Rothman
11 months ago
Maya Rothman 11 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. Also see http://mdsamericas.com/ for alternatives to Limestone.

Alan Carter
11 months ago
Alan Carter 11 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?

Victor Bergman
11 months ago
Victor Bergman 11 months ago

Thank you guys!

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