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For an acid drainage study I need a Procedure for ARD AMD Leach Test for Assessing Water Reactivity and Leaching Potential of Mine Wastes. My project requires the assessment of the selective copper extraction from a waste material (AMD Sludge) in Alkaline-Ammonia media. Does anyone have a laboratory procedure to do extraction tests (Agitated leach tests). I hear it was a good idea to extract Cu from slurry so that copper can be recovered and metal content in slurry is therefore reduced.