浮游球衣菌去除废水中Pb^(2+)的研究  被引量:12

Research on Pb^(2+) Removal from Wastewater by Sphaerotilus natans

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作  者:关晓辉[1] 秦玉春[1] 赵洁[1] 魏德洲[2] 

机构地区:[1]东北电力学院应用化学系,吉林132012 [2]东北大学资源与土木工程学院,沈阳110004

出  处:《环境科学》2005年第6期94-96,共3页Environmental Science

基  金:国家自然科学基金项目(50174014)

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.As biosorbent used Sphaerotilus natans, influencing factors on removal of Pb^2+ 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 Pb^2+. The process of adsorption reached equilibrium in 10 minutes. Temperature has no significant effect on the adsorption. Removal of Pb^2 + 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 Pb^2+ 0-60 mg/L. HCl and EDTA can desorb the Pb^2+ from the bacteria effectively.

关 键 词:浮游球衣菌 PB2+ 吸附特性 

分 类 号:X75[环境科学与工程—环境工程]

 

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