| 天然水生物膜胞外多糖和胞外蛋白吸附镉的特性 |
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| 引用本文： | 苏春彦,康春莉,董德明. 天然水生物膜胞外多糖和胞外蛋白吸附镉的特性[J]. 长春工程学院学报(自然科学版), 2005, 6(4): 67-69 |
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| 作者姓名： | 苏春彦 康春莉 董德明 |
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| 作者单位： | 吉林大学,环境与资源学院,长春,130023;长春工业大学,化学工程学院,长春,130012;吉林大学,环境与资源学院,长春,130023 |
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| 基金项目： | 中国科学院资助项目 , 吉林大学校科研和教改项目 |
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| 摘 要： | 研究了长春市南湖天然水环境中生物膜优势菌种胞外多糖和胞外蛋白对镉的吸附特征及其影响因素.结果表明,胞外多糖和胞外蛋白对镉的吸附过程符合Langmuir和Freundlich热力学等温方程,胞外多糖和胞外蛋白对镉的动力学吸附特征符合Langmuir-Hinshelwood方程的一级反应模式.而铅的存在会影响对镉的吸附.
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| 关 键 词： | 生物膜 胞外多糖 胞外蛋白 镉 吸附 |
| 文章编号： | 1009-8984（2005）04-0067-03 |
| 收稿时间： | 2005-02-23 |
| 修稿时间： | 2005-02-23 |
Absorption of Cd by exopolysaccharide and extracelluar protein of natural biofilm |
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| SU Chun-yan,KANG Chun-li,DONG De-ming. Absorption of Cd by exopolysaccharide and extracelluar protein of natural biofilm[J]. Journal of Changchun Institute of Technology(Natural Science Edition), 2005, 6(4): 67-69 |
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| Authors: | SU Chun-yan KANG Chun-li DONG De-ming |
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| Abstract: | The adsorption of Cd~(2+) on the exopolysaccharide and extracellular protein of natural biofilm was investigated in this article.The exopolysaccharide and extracellular protein was obtained from the extracellular polymers of superiority bacteria of natural biofilm cultivated in Changchun South Lake.The results showed that both Langmuir and Freundlich isotherm equations could describe the thermodynamics absorption processes of Cd~(2+).One order kinetic model of Langmuir-Hinshelwood equation could describe the kinetic adsorption characteristic of Cd.The biosorption ability of the exopolysaccharide is much higher than the extracellular protein. |
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| Keywords: | biofilm protein exopolysaccharide extracelhdar cadmium absorption |
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