将三乙烯四胺修饰到戊二醛交联的啤酒废酵母菌表面,合成了一种新的生物吸附剂.研究了它吸附Hg(Ⅱ)的性能及影响吸附行为的因素.结果表明,修饰啤酒废酵母菌吸附Hg(Ⅱ)的适宜条件是:2.5℃,吸附溶液的pH =2.8,吸附平衡时间20 min,对汞的吸附容量为132.6 mg/g,是未修饰菌的6.3倍.该法静态处理含汞模拟废水(4.9～17.5 mg/L),汞去除率可达100％.吸附动力学用准二级方程拟合,相关系数R2=0.9999.判定Langmuir模型更适合描述吸附Hg(Ⅱ)的过程,表明是单分子层吸附.
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