月桂酰基谷氨酸钠促进矿物润滑油生物降解的作用机制  

Mechanisms of Enhanced Biodegradability of Mineral Lubricating Oil with Sodium Lauroyl Glutamate

作　　者：高菱悦 陈波水[1] 张楠[2] 吴江[1] 

机构地区：[1]后勤工程学院军事油料应用与管理工程系,重庆401311 [2]后勤工程学院国防建筑规划与环境工程系,重庆401311

出　　处：《后勤工程学院学报》2016年第2期47-51,共5页Journal of Logistical Engineering University

基　　金：国家自然科学基金项目(50975282)

摘　　要：采用正十六烷模拟矿物润滑油,以混合菌群为降解微生物,含氮表面活性剂月桂酰基谷氨酸钠为添加剂,通过气相色谱仪考察添加剂对正十六烷生物降解性的影响,气质联用仪观察降解中间产物变化,可见光分光光度计考察降解过程中微生物生长情况,表面张力仪分析培养基油/水溶液表面张力变化,以此共同解析月桂酰基谷氨酸钠促进矿物润滑油生物降解的作用机理。结果表明,生物降解过程中月桂酰基谷氨酸钠先于正十六烷分解为谷氨酸盐和月桂酸盐,微生物依次降解谷氨酸盐、月桂酸盐和正十六烷。月桂酰基谷氨酸钠及其降解产物不仅能降低油/水溶液表面张力,还可为微生物提供营养,加速微生物生长,两方面作用共同促进正十六烷的生物降解。Impacts of sodium lauroyl glutamate on biodegradation of n-hexadecane as a model mineral lubricating base oil un-der mixed flora were tested with gas chromatography. Furthermore, the biodegradation species, the microbial populations and the oil/water interfacial tensions of the culture media were analyzed with a gas chromatography-mass spectrometry, a visible light spectro-photometer and a surface tension meter respectively. The mechanisms for sodium lauroyl glutamate to promote biodegradation of n-hexadecane were as such inferred. The results indicated that sodium lauroyl glutamate primarily decomposed into glutamate and lau-rate in advance of biodegradation of n-hexadecane in the initial biodegradation durations. Thereafter, glutamate, laurate and n-hexa-decane were in turn biodegraded. Sodium lauroyl glutamate and its biodegradation products helped to enhance biodegradation of n-hexadecane by reducing the oil/water interfacial tensions and promoting microbial production as a nutrient of microorganisms.

关 键 词：月桂酰基谷氨酸钠 矿物润滑油 正十六烷 生物降解 

分 类 号：TE626.3[石油与天然气工程—油气加工工程]