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微生物吸附剂对重金属的吸附特性
引用本文:王亚雄,郭瑾珑,刘瑞霞.微生物吸附剂对重金属的吸附特性[J].环境科学,2001,22(6):72-75.
作者姓名:王亚雄  郭瑾珑  刘瑞霞
作者单位:1. 清华同方股份有限公司环境事业工程部,
2. 中国科学院生态环境研究中心
基金项目:国家自然科学基金资助项目(20037010)
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.

关 键 词:微生物吸附  重金属  类产碱假单胞菌  藤黄微球菌
文章编号:0250-3301(2001)06-04-0072
收稿时间:3/6/2001 12:00:00 AM
修稿时间:2001年3月6日

Biosorption of Heavy Metals by Bacteria Isolated from Activated Sludge
Wang Yaxiong,Guo Jinlong and Liu Ruixia.Biosorption of Heavy Metals by Bacteria Isolated from Activated Sludge[J].Chinese Journal of Environmental Science,2001,22(6):72-75.
Authors:Wang Yaxiong  Guo Jinlong and Liu Ruixia
Institution:State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Abstract: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 kinetic 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.
Keywords:biosorption  heavy metals  Pseudomonas pseudoalcaligenes  Micrococcus luteus GC subgroup B
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