Okay, let's be super clear....there is gold in fly ash and I don't need a Harvard study to tell me that. Depending on where you live and the local geology there is probably more gold in the dirt in your back yard.
I guess I am just not making my point clear enough. If you have to process a thousand tons of fly ash to recover a gram of gold, it ain't worth it - it does not matter what process you use, the cost to simply pick up and move that amount of material makes it not worthwhile.
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