The Ashing and Volume Decreasing Analysis of Biosorption of Strontium by Yeast(Saccaromyces cerevisiae) Cell

Biosorption, as an alternate method to traditional radioactive wastes disposal and the incineration of the microorganism after biosorption have great volume decrease ratio. The characters of incinerated yeast cell sedimentation after biosorption of strontium was studied and volume decreasing ratio (VDR) and weight reduction radio (WRR) was calculated in this research. Energy Dispersive X-ray Spectroscopy (EDS) analysis showed that there was 0.65-33.79% of strontium in the ash of incinerated yeast cell sedimentation at different initial strontium concentration. X-ray Diffraction (XRD) analysis identified that strontium existed in the ash of incinerated yeast cell sedimentation as SrSO₄ when the initial strontium concentration was larger than 500mg/L and Sr₃(PO₄)₂ when the initial strontium concentration was about 100mg/L. The VDR was larger than 1000 and WRR was 11.7 to 43.8. The VDR and WRR results showed that the biosorption by yeast cell combined with incineration/ashing was a potential radioactive waste disposal method for further treatment such as solidification.