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Study on Bio sorption of Ion-Lead by Yeast

SUN Jingliang,ZHAO Ruixue,ZHENG Xiaoqiu(School of Chemical and Environmental Engineering,Changchun University of Science and Technology,Changchun 130022)  
The beer yeast as the biosorption of Pb~(2+) was studied.The yeast can effectively combine with Pb~(2+).The adsorptive capacity may reach maximal value at pH=6.Adsorption can get to equalization after fifty minutes.The maximal adsorptive capacity is 10~2mg/g.Salinity and Ca~(2+)、Mg~(2+) have not significant effect on the biomaterial uptake.The adsorption can proceed at the room temperature.After the yeast is pretreated by acid,the adsorptive capacity can increase.The model of absorption is fit for Langmuir Isotherm Adsorption Equation.
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