Revegetation Using Coal Ash Mixtures

Abstract
To ascertain whether bottom ash, or mixtures of fly ash and bottom ash from power generation could serve as acceptable final covers for landfills, field revegetation studies and indoor plant elemental bioavailability studies were conducted. It was found that bottom ash alone, or mixed with as much as 10% fly ash performs as well as topsoil in serving as a final cover, in terms of revegetation potential. Based on bioavailability studies, the inhibitory effects of higher proportions of fly ash may be due to boron toxicity.