| 3种微生物吸附剂对低浓度Cd2+的吸附特性研究 |
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| 引用本文： | 李欣,谭周亮,周后珍,张银莲,李旭东.3种微生物吸附剂对低浓度Cd2+的吸附特性研究[J].环境科学与技术,2011,34(12):7-13. |
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| 作者姓名： | 李欣 谭周亮 周后珍 张银莲 李旭东 |
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| 作者单位： | 1. 中国科学院成都生物研究所,四川成都610041;中国科学院研究生院,北京100049
2. 中国科学院成都生物研究所,四川成都,610041 |
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| 基金项目： | 中国科学院知识创新工程重要方向项目，国家"863"重大项目课题，四川省科技厅项目 |
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| 摘 要： | 从铬鞣污泥和活性污泥中筛选到3种微生物TP、MY和TQ,将其制备成微生物吸附剂对低浓度Cd2+的吸附特性进行研究.结果表明:在Cd2+初始浓度为5.0 mg/L的溶液中,吸附剂TP和MY最佳投加量和pH值为1.0 mg/L和7.0;TQ为2.0 mg/L和4.0 mg/L.TP、MY和TQ的最佳吸附温度是20℃.等温方...
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| 关 键 词： | 生物吸附 Cd2+ 等温吸附模型 动力学 热力学 |
Adsorptive Capacity and Kinetics of Cd2+ with 3 Biosorbents |
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| LI Xin,TAN Zhou-liang,ZHOU Hou-zhen,ZHANG Yin-lian,LI Xu-dong.Adsorptive Capacity and Kinetics of Cd2+ with 3 Biosorbents[J].Environmental Science and Technology,2011,34(12):7-13. |
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| Authors: | LI Xin TAN Zhou-liang ZHOU Hou-zhen ZHANG Yin-lian LI Xu-dong |
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| Institution: | 1(1.Chengdu Institute of Biology,Chinese Academy of Sciences,Chengdu 610041,China;2.Graduate School,Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | Mechanism and function of Cd2+ sorption by biosorbents such as TP,MY and TQ were studied,which were screened from chrome tanned sludge and activated sludge.Results indicated that the optimal pH value and mass concentration of TP and MY were 7.0 and 1.0 g/L,and TQ was 4.0 and 2.0 g/L in initial concentration of 5.0 mg/L Cd2+ solutions,and the optimal temperature was 20 ℃.TP and MY fit well with Langmuir isotherm model,and TQ fits well with D-R isotherm model.Actual sorption process was identical relatively with pseudo-second-order Lagergren model and was depicted the spontaneous nature of biosorption process by thermodynamic parameters.FTIR data indicated that the functional group of amido,hydroxyl group,carboxyl and hydroxyl played a principal role in the adsorption.Results showed that the removal of Cd2+ was significant by 3 adsorbents to low concentration Cd2+ aqueous solution,with the order of the maximum adsorption capacity as TP,MY and TQ. |
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| Keywords: | biosorption Cd2+ isotherm model kinetics thermodynamics |
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