Dose-mortality assessment upon toxicity potency of CFBC fly ash to Escherichia coli

The findings showed that at ca. 1000-3000 mg/L growth capability of E. coli gradually declined. Moreover, approx. 3000 mg/L seemed to be the maximal effect concentration of E. coli for survival. Dose-mortality assessment revealed that the range of threshold toxicity of CFBC fly ash was ca. 1000-3000 mg/L. Compared to prior findings using other ash materials, apparently CFBC fly ash is relatively less toxic than sodium nitrate (NaNO3) and other forms of ash for practical use as building material.