| 一株产絮酵母菌废菌体对Cd2+的吸附特性 |
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| 引用本文： | 张广金,信欣,毛言,刘韵,陈梅. 一株产絮酵母菌废菌体对Cd2+的吸附特性[J]. 环境工程学报, 2012, 6(5): 1595-1598 |
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| 作者姓名： | 张广金 信欣 毛言 刘韵 陈梅 |
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| 作者单位： | 成都信息工程学院资源环境学院,成都,610225 |
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| 基金项目： | 成都信息工程学院校级大学生创新性实验计划项目（200903）；四川省教育厅资助项目（11ZB090） |
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| 摘 要： | 将一株产絮酵母菌(编号B-02号)发酵后的废菌体制成生物吸附剂,研究该生物吸附剂对废水中Cd2+的生物吸附特性。结果表明:(1)pH值对Cd2+会产生较大的影响,偏酸性(pH=4～6)条件利于吸附;该吸附剂对Cd2+吸附速率较快,8～10 min就可达到吸附平衡;(2)吸附剂的吸附动力学符合二级动力学模型,吸附Cd2+的实验数据对Langmuir等温式的拟合情况良好,吸附剂吸附Cd2+的最大吸附量为70.752 mg/g。用0.5 mol/L HNO3对吸附Cd2+的酵母菌进行解吸,解吸率可达89.7%。
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| 关 键 词： | 吸附特性 产絮酵母菌 Cd2+ |
Characteristics of Cd2+ biosorption by waste yeast cells produced flocculant |
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| Zhang Guangjin,Xin Xin,Mao Yan,Liu Yun and Chen Mei. Characteristics of Cd2+ biosorption by waste yeast cells produced flocculant[J]. Techniques and Equipment for Environmental Pollution Control, 2012, 6(5): 1595-1598 |
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| Authors: | Zhang Guangjin Xin Xin Mao Yan Liu Yun Chen Mei |
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| Affiliation: | Zhang Guangjin Xin Xin Mao Yan Liu Yun Chen Mei (College of Resources and Environment,Chengdu University of Information Technology,Chengdu 610225,China) |
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| Abstract: | The biosorption characteristis of waste cells of a yeast named B-02 produced flocculant as the biosorbent for the removal of Cd2+ from aqueous solution was investigated.The results showed that(1) the adsorption of Cd2+ by waste cells of a yeast was a quick process which only needed 8～10 min to reach equilibrium,and the optimum pH was about 4～6.(2) The adsorption reaction meets the pseudo-second-order kinetic model.The reaction of biosorbent B-02 adsorption Cd2+ was consistent with the Langmuir adsorption isotherm model,and the maximum adsorption capacity for Cd2+ was 70.752 mg/g.The desorption rate of Cd2+ by 0.5 mol/ L HNO3 was 89.7 %. |
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| Keywords: | adsorption characteristics yeast produced flocculant Cd2+ |
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