| 假单胞菌S-7产生的表面活性剂特性研究 |
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| 引用本文： | 郝瑞霞,潘永强,王关玉. 假单胞菌S-7产生的表面活性剂特性研究[J]. 北京大学学报(自然科学版), 2003, 39(6): 844-849 |
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| 作者姓名： | 郝瑞霞 潘永强 王关玉 |
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| 作者单位： | 1. 北京大学地质学系,北京,100871
2. 胜利石油管理局采油工艺研究院,山东,东营,257000 |
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| 基金项目： | 国家重点基础研究发展计划(973计划);2001CCA02400; |
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| 摘 要： | 假单胞菌S-7菌株在代谢过程中能够产生糖脂和脂肽表面活性物质，其临界胶束浓度(CMC)为236mg／L，可以将水的表面张力由72mN／m降到29．7mN／m，油水界面张力由30mN／m降到1．3mN／m。发酵液在不同的温度、pH和矿化度条件下，具有稳定的表面活性。发酵液可以乳化原油，使原油的粘度降低86．95％。研究表明，表面活性物质是S-7菌株在微生物采油过程中发挥作用的主要因素。
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| 关 键 词： | 假单胞菌 生物表面活性剂 表面张力 界面张力 原油 |
Studies on Characteristics of Surfactants Produced by Pseudomonas sp. S-7 |
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| HAO Ruixia ) PAN Yongqiang ) WANG Guanyu ). Studies on Characteristics of Surfactants Produced by Pseudomonas sp. S-7[J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2003, 39(6): 844-849 |
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| Authors: | HAO Ruixia ) PAN Yongqiang ) WANG Guanyu ) |
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| Affiliation: | HAO Ruixia 1) PAN Yongqiang 2) WANG Guanyu 1) |
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| Abstract: | Pseudomonas sp. S-7 strain can produces glucolipid and lipopeptide in met abolism. The critical micelle concentration of surfactants is 36mg/L. Surfactant s make the surface tension of water decrease from 72?mN/m to 29 7?mN/m, a nd make t he interfacial tension between oil and water reduce from 30?mN/m to 1 3?mN/ m. The fermented broth has stable surface activity at different temperature, pH and sal inity; it emulsifies crude oil and makes the viscosity of crude oil decrease 86. 95%. The present study states that the surfactants are major factors of S-7 strain in microbial enhanced oil recovery. |
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| Keywords: | Pseudomonas biosurfactant surface tension interfacial tension crude oil |
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