Biosorption behavior of dead baker's yeast to Sr~(2+) and its effect by γ-ray radiation

The biosorption behavior of strontium ions on dead baker's yeast were investigated with the instruments of AAS,EDS.The effect factors on biosorption of baker's yeast to Sr2+ such as pH values and adsorbent dosage were analyzed.Then the kinetics processes were analysis to Sr2+ before and after the radiation.The results show that there were all the fast processes to biosorption of Sr2+ on baker's yeast at different temperature.In the whole kinetics processes,the adsorption quantity(qt) was always being the relation of 30℃20℃10℃.The results of baker's yeast to Sr2+ were all consistent with pseudo-second order adsorption kinetics at different experimental temperatures(as R0.999) and it shows that the limit rapid step was the chemistry adsorption process.EDS analysis also proved that strontium ions were absorbed on backer's yeast cells.The biosorption effect to Sr2+ on baker's yeast after radiation was better than the control groups without radiation.