Chemical Industry and Engineering Progree ›› 2012, Vol. 31 ›› Issue (03): 639-642.

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Biosorption of Sr2+ by immobilized Saccharomyces cerevisiae

YANG Yushan1DONG Faqin1LUO Shunzhong1ZHANG Wei1   

  1. (1Key Laboratory of Defensive Discipline on Nuclear Wastes and Environmental Safety,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;2Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics,Mianyang 621900,Sichuan,China)
  • Online:2012-03-05 Published:2012-03-05

固定化啤酒酵母对锶离子的吸附

杨玉山1,董发勤1,罗顺忠2,张  伟1   

  1. 1西南科技大学核废物与环境安全国防重点学科实验室,四川 绵阳 621010
    2中国工程物理研究院核物理与化学研究所,四川 绵阳 621900

Abstract: Saccharomyces cerevisiae was entrapped in a mixture of 2% SA,and 4%CaCl2. The mechanical strength of SA-CaCl2 immobilized beads,and the effects of adsorption treatment conditions,such as pH,temperature,Sr2+ initial concentration and reaction time,on the adsorptive capacity were investigated. The results show that the mechanical strength of immobilized Saccharomyces cerevisiae is higher at 10% Saccharomyces cerevisiae,the optimal adsorption condition for immobilized Saccharomyces cerevisiae is as follows:pH 4.5,temperature 30 ℃,Sr2+ initial concentration 50 mg/L,adsorption time 4 h. The sorption process of Sr2+ is in accordance with both Langmuir and Freundlich isotherm when the concentration of Sr2+ is 10—150 mg/L,but complies with Freundlich model better.

Key words: Saccharomyces cerevisiae, immobilized cell, Sr2+, biosorption

摘要: 用2%海藻酸钠(SA),4%氯化钙(CaCl2)包埋法制备了固定啤酒废酵母。考察了菌体含量对固定化菌体强度的影响,研究了pH值、温度、Sr2+初始浓度、吸附时间等外界因素对固定化啤酒酵母吸附溶液中Sr2+的影响。结果表明:菌体含量为10%时,制备的固定化菌体具有较好的机械强度。固定化啤酒废酵母对Sr2+最佳吸附条件为:pH=4.5,温度30 ℃,Sr2+起始浓度50 mg/L,吸附时间4 h。Sr2+浓度在10~150 mg/L范围内,固定化啤酒废酵母对Sr2+的吸附符合Langmuir模型和Freundlich模型,但符合Freundlich模型的程度更优。

关键词: 啤酒酵母菌, 固定化, Sr2+, 生物吸附

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