Mutagenicity of Filtrates from Respirable Coal Fly Ash

Abstract
Incubation of histidine-requiring auxotrophs of the bacterium Salmonella typhimurium with cyclohexane-, saline-, and serum-soluble surface components of respirable fly ash particles produced an increased number of revertants in two frame-shift tester strains. The results are consistent with the hypothesis that both organic and inorganic mutagens are present in coal fly ash.