Re: Landfill
Slight technical point. The REs don't in fact preferentially concentrate in the fly ash nor clinker. Pity but there it is. The germanium concentrates beautifully in the fly ash which is why we get 50% of the world's supply from that source.
Ash will have, around and about, whatever concentration was in the original coal minus the carbon. Which isn't quite enough to produce a viable concentration to extract. A number of US schemes testing this out at present and absent some environmental case - say, cleaning up ash ponds - lifting some of the cost it doesn't work.
Biting the hand that feeds IT
