浮游球衣菌的分离及其对铅离子的吸附性能

利用改进后的菌种分离方法,从某污水中分离得到一菌株·研究了该菌株的菌落形态特征、菌株形态特征、生理生化特性、生长曲线、菌种保藏方法及其对Pb2+的吸附特性·经研究确定该菌株为第十四群鞘细菌类(sheathedbacteria)球衣菌属(Sphaerotilus)浮游球衣菌(Sphaerotilusnatans)·吸附实验结果表明:浮游球衣菌对Pb2+有很好的吸附效果,在10min内即可达到吸附平衡;在pH值约为5 5,菌的质量浓度为0 6g/L,铅离子初始质量浓度不大于20mg/L时,Pb2+去除率接近100%·

Isolation of Sphaerotilus Natans and Its Biosorption of Pb2+

Improving the technique of culture separation, the strain Sphaerotilus natans was isolated from a kind of wastewater. A test was done for its colonial morphology, biochemical and physiological features, growth curve, culture preservation and biosorption of heavy metals. The strain was identified to be of Sphaerotilus as the 14th group of sheathed bacteria. Testing results showed that Sphaerotilus natans has excellent effect on adsorption of Pb²⁺. The biosorption can reach equilibrium within 10 minutes. The removal rate of Pb²⁺ approaches to 100% under conditions that pH=5.5, drying biomass =0.6 g/L and initial Pb mass concentration ρ0&le20 mg/L.