悬浮酵母菌对重金属Cd2+的吸附研究

研究了悬浮酵母菌菌株对水相中Cd2+的吸附过程,讨论了各试验因素对吸附效果的影响.结果表明,悬浮酵母菌菌株对水相中的Cd2+有吸附作用;吸附过程10 min就达到平衡;pH对吸附过程影响较大,在pH=5.41时,镉离子的吸附效果最好;溶液的初始质量浓度也是影响吸附效果的主要因素,在初始质量浓度为228.4 mg/L,悬浮酵母菌用量为14 g/L时,镉离子的吸附率达到99%.测试的红外光谱结果显示:悬浮酵母菌对Cd2+的主要吸附位点为-OH,C=O,P=O,-NH2及S=O.

Effect of Biosorption of Cd2+ by Suspended Saccharomycete Biomass

The biosorption of Cd²⁺ by suspended saccharomycete was investigated with various influencing factors on the process discussed. The results showed that 10 minutes after starting the process, the adsorption equilibrium comes about. The pH value has a great effect on the biosorption, and when it is 5.41, the biosobent shows a best adsorbing effect. The initial mass concentration of adsorbate is also an important influencing fact on the biosorption, and the adsorbing rate can be up to 99% if the concentration of adsorbate is 228.4 mg/L and that of adsorbent is 14 g/L. The results of IR spectrum showed that the adsorbing positions of the suspended saccharomycete biomass to Cd²⁺ are mainly the -OH, C=O, P=O, -NH2, and S=O.