【作者】 王立娜；

【导师】 赵瑞雪；

【作者基本信息】 长春理工大学 ， 无机化学， 2008， 硕士

【摘要】 生物吸附法是近年来新兴的一种水处理方法,以其原料来源丰富,成本低,无二次污染等优点,是国内外研究的热点内容,具有广阔的发展前途和应用前景。啤酒酵母对Pb²⁺离子吸附率为82.80%;用2%PVA + 1%SA为包埋剂固定化啤酒酵母对Pb²⁺具有最佳吸附效果。实验结果表明:菌量为20g/L,包埋剂比例为2 :1,CaCl₂浓度为3%（W/V） ,钙化时间为4h,用未作处理的固定化菌体,在pH值为4.0,Pb²⁺初始浓度为0.2413mmol·L^-1,菌体加入量为20g/L,温度为28℃的条件下,振荡吸附3h,吸附率为92.65%。在此条件下,用固定化酵母菌处理含Pb²⁺离子的工业废水,其吸附率为91.78%,用1.0mol/LHCl洗脱吸附剂,第一次洗脱率达98.65%,重复使用三次,吸附率达70%以上,洗脱率在90%以上。固定化啤酒酵母对金属Pb²⁺离子的平衡吸附模型较好的符合Langmuir等温吸附模型和Freunlich等温吸附模型。固定化啤酒酵母吸附金属离子反应的动力学吸附模型,符合准二级反应。更多还原

【Abstract】 Biological absorption is a kind of promising water treatment method in recent years. It has been becoming a hotspot content at home and abroad for its advantages of resourceful raw material, low cost, no second pollution, so it will have development future and application prospect.The adsorption rate of beer yeast to Pb²⁺ is 82.80%. Adsorption of beer yeast immobilized by 2% PVA and 1% SA as embedding agents on Pb²⁺ ions has the optimum effect. The result showed the amount of beer yeast is 20g/L, ratio of the embedding agents is 2∶1, concentration of CaCl₂ is 3%（W/V）, the immobilized time is 4h, respectivly. The absorption efficiency of untreated yeast immobilized was 92.65%, when the pH value was 4.0, the Pb²⁺ ion initial concentration was 0.2413 mmol·L^-1, the amount of beer yeast was 20g/L, the temperature was 28℃,shaking absorption time was 3h. Under these conditions, the absrption rate is 91.78% when industrial waste water of Pb²⁺ ions was treated by beer yeast immobilized. By using 1.0 mol·L^-1 HCl as eluent azent, the absorption efficiency was up 70% and the elution efficiency was 90%.The adsorption model of beer yeast immobilized on Pb²⁺ ions was conformed to the Langmuir isothermal adsorption equation and the Freunlich isothermal adsorption equation. The dynamics adsorption model of beer yeast immobilized on heavy metal ion was conformed to pseudo-second-order.更多还原