Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Songling Road, Qingdao 266100, Shandong Province, China.
College of Chemistry and Chemical Engineering, Ocean University of China, Songling Road, Qingdao 266100, Shandong Province, China.
Mar Pollut Bull. 2017 Dec 15;125(1-2):433-439. doi: 10.1016/j.marpolbul.2017.09.013. Epub 2017 Sep 29.
Effective emulsification plays an important role in the treatment of marine oil spills. The negative effects of chemical surfactants have necessitated a search for alternative dispersant that are sustainable and environmentally-friendly. To identify alternate dispersants, oil-in-seawater emulsions stabilized by hydrocarbon-degrading bacteria were investigated. After individual immobilization and surface-modification, the hydrocarbon-degrading bacteria, Bacillus cereus S-1, was found to produce a stable oil-in-seawater Pickering emulsion, which was similar to particle emulsifiers. The individual immobilization and surface-modification process improved the surface hydrophobicity and wettability of the bacterial cells, which was responsible for their effective adsorption at the oil-water interface. Through effective emulsification, the biodegradation of oil was remarkably facilitated by these treated bacteria, because of the increased interfacial area. By combining the emulsification and biodegradation, the results of this reported work demonstrated a novel approach for developing environmentally-friendly bioremediation technology in the field of oil treatment.
有效乳化在处理海洋溢油方面起着重要作用。化学表面活性剂的负面影响促使人们寻找可持续且环保的替代分散剂。为了确定替代分散剂，研究了由烃类降解菌稳定的油包水乳状液。经过单独的固定化和表面改性，发现烃类降解菌蜡状芽孢杆菌 S-1 产生了一种类似于颗粒乳化剂的稳定的海水 Pickering 乳状液。单独的固定化和表面改性过程提高了细菌细胞的表面疏水性和润湿性，这使其能够有效地吸附在油水界面上。通过有效的乳化作用，这些经过处理的细菌显著促进了油的生物降解，因为增加了界面面积。通过乳化和生物降解的结合，这项工作的结果展示了一种在处理石油领域开发环保生物修复技术的新方法。
