I am conducting a substance flow analysis of waste-water treatment plant and we are observing up to 60% of Mo and 5% of Mo and Se is leaching out from sludge ash. This number seems quite high but I am not finding good articles on Mo and Se leaching.
Leachability of elements in alkaline and acidic coal fly ash samples during batch and column leaching test.Ghanashyam Neupane, Rona J. Donahoe.Volume 104, February 2013, Pages 758–770.