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 (Pseudomonaspseudoalcaligenes)和藤黄微球菌 (Micrococcusluteus)GCsubgroupB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H2 SO4 是Cu(Ⅱ )
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.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2001年第6期72-72,共1页
Environmental Science
基金
国家自然科学基金资助项目 (2 0 0 370 10 )
关键词
吸附特性
微生物吸附
重金属
类产碱假单胞菌
藤黄微球菌
biosorption
heavy metals
Pseudomonas pseudoalcaligenes
Micrococcus luteus GC subgroup B
