| 浮游球衣菌去除废水中Pb2+的研究 |
| 摘要点击 2805 全文点击 2261 投稿时间：2004-10-18 修订日期：2004-12-14 |
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| 中文关键词 浮游球衣菌 Pb2+ 吸附特性 |
| 英文关键词 Sphaerotilus natans Pb2+ adsorption character |
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| 中文摘要 |
| 以浮游球衣菌为生物吸附剂,考察了菌铅比、pH、温度和时间等因素对Pb2+吸附的影响.结果表明,浮游球衣菌对Pb2+有很好的吸附效果,该过程10min内即可达到吸附平衡,且温度对吸附效果影响不大.当pH5.5,菌含量0.6 g/L,铅离子初始浓度不大于20 mg/L时,Pb2+去除率近100%,浮游球衣菌最大单位吸附量为2.1 mmol/g干菌体.浮游球衣菌对0～60 mg/LPb2+的吸附符合Freundlich方程.HCl和EDTA溶液可有效地将Pb2+从菌体上解吸下来并可重复使用. |
| 英文摘要 |
| As biosorbent used Sphaerotilus natans,influencing factors on removal of Pb2+ were investigated such as ratio of the biomass and lead,pH,temperature and time of adsorption.The results show that Sphaerotilus natans has good effect on adsorption of Pb2+.The process of adsorption reached equilibrium in 10 minutes.Temperature has no significant effect on the adsorption.Removal of Pb2+ approached to 100% under the condition of pH 5.5,0.6 g/L and c0≤20 mg/L.The maximum adsorption amount was 2.1 mmol/g dry biomass.The adsorption was fitted with Freundlich isotherm adsorption equation under the concentration of Pb2+ 0～60 mg/L.HCl and EDTA can desorb the Pb2+ from the bacteria effectively. |
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