一种用于石油工业生物技术的新型细菌衍生生物表面活性剂:生产、优化、生物表面活性剂的功能和理化特性

IF 1.6 Q3 WATER RESOURCES
Marwa Elghoul, Mouna Bouassida, D. Ghribi, Mnif Inès
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引用次数: 0

摘要

针对脂肽类生物表面活性剂(BioS)在生物修复中的潜在应用,研究了一株分离的芽孢杆菌MI27在生物修复中的应用。采用实验设计方法,优化了由2%蔗糖、0.27% Na2HPO4、0.2%硫酸铵、0.02% NaCl、0.02% CaCl2、0.02% MgSO4、0.001% MnSO4、0.06% KH2PO4、0.005% FeSO4和0.005% ZnSO4组成的蔗糖基培养基。使用这种成分,应变MI27产生1.4 g/L,最大表面张力(ST)降低23 mN/m,分散直径约为10 cm。乳化和发泡活性也得到了证实。临界胶束浓度(CMC)约为120 mg/L,最大ST降低23 mN/m,最大分散性和乳化指数(EI)约为12 cm和45%。在1000 mg/L条件下稳定孵育1 h,起泡率约为80%。此外,我们还研究了不同pH值、温度和盐度对MI27 BioS活性和稳定性的影响。结果表明,在极端物理化学条件下,特别是在酸性和碱性、高低温和高盐度条件下,其表面活性非常有趣。这些特点使生物化学在不同环境条件下的水处理生物技术应用成为可能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A new bacterial-derived biosurfactant for biotechnological applications in the oil industry: production, optimization, biosurfactant functional and physicochemical characterization
Aiming at the potential application of lipopeptide biosurfactant (BioS) in bioremediation, we studied its production by a novel, isolated strain of Bacillus sp. MI27. Using the experimental design methodology, a sucrose-based medium composed of 2% sucrose, 0.27% Na2HPO4, 0.2% ammonium sulfate, 0.02% NaCl, 0.02% CaCl2, 0.02% MgSO4, 0.001% MnSO4, 0.06% KH2PO4, 0.005% FeSO4 and 0.005% ZnSO4 was optimized. With this composition, strain MI27 produces 1.4 g/L with maximum surface tension (ST) reduction of 23 mN/m and a dispersion diameter of around 10 cm. Emulsifying and foaming activities have been also confirmed. The critical micelle concentration (CMC) value of about 120 mg/L with a maximal decrease of ST of 23 mN/m with a maximum dispersion and an emulsification index (EI) of about 12 cm and 45% at 1,000 mg/L. Moreover, the foaming capacity is about 80% at 1,000 mg/L stable over 1 h of incubation. Additionally, we studied the effect of different values of pH, temperature and salinities on MI27 BioS activity and stability. Obtained results showed interesting surface activities at extreme physicochemical conditions, especially at acidic and alkaline pH values, high and low temperatures and higher salinities. All these characteristics enable the possible application of BioS in water treatment biotechnology under diverse environmental conditions.
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来源期刊
CiteScore
2.30
自引率
6.20%
发文量
136
审稿时长
14 weeks
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