| 微生物吸附剂对重金属的吸附特性 |
| 摘要点击 2386 全文点击 4955 投稿时间：2001-03-06 |
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| 中文关键词 微生物吸附 重金属 类产碱假单胞菌 藤黄微球菌 |
| 英文关键词 biosorption heavy metals Pseudomonas pseudoalcaligenes Micrococcus luteus GC subgroup B |
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| 中文摘要 |
| 从活性污泥中分离得到5株菌,检验了它们对重金属离子的吸附能力,其中类产碱假单胞菌(Pseudomonas pseudoalcaligenes)和藤黄微球菌(Micrococcus luteus)GC subgroup B对Cu(Ⅱ)和Pb(Ⅱ)离子吸附能力最强.考察了Cu(Ⅱ)和Pb(Ⅱ)离子分别在这2种菌体上的吸附特性研究表明,Langmuir型吸附模式能很好地描述Cu(Ⅱ)和Pb(Ⅱ)离子在这2种菌体上的吸附实验数据,其线形回归系数高达0.99,溶液pH值是影响吸附的最主要因素,pH=5～6是吸附Cu(Ⅱ)和Pb(Ⅱ)离子的适宜条件.吸附动力学实验研究表明,菌体对Cu(Ⅱ)和Pb(Ⅱ)离子的吸附可以分为迅速的细胞表面结合和缓慢的向细胞内的传输,稀HNO3和H2SO4是Cu(Ⅱ)离子从Micrococcus luteus GC subgroup B菌体上有效的洗脱剂.
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| 英文摘要 |
| In this paper, biosorption efficiency of heavy metals by bacteria isolated from activated sludge was tested. It was shown that Pseudomonas pseudoalcaligenes and Micrococcus luteus GC subgroup B had high biosorption capacities for Cu(Ⅱ) and Pb(Ⅱ) ions. The adsorption of the two ions on Pseudomonas pseudoalcaligenes and Micrococcus luteus GC subgroup B exhibited Langmuir adsorption behavior with regression coefficient of 0.99. The pH value was the most important effect factor on biosorption of metal ions. The biosorption kinectic curves of Cu(Ⅱ) and Pb(Ⅱ) ions by cells showed two processes: rapid sorption on cell surface and slowly longer term transformation into cells. Cu(Ⅱ) ion can be desorbed effectively from cells of Micrococcus luteus GC subgroup B. |
