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首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Biodegradation of Petroleum Hydrocarbons by Two Pseudomonas aeruginosa Strains with Different Uptake Modes
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Biodegradation of Petroleum Hydrocarbons by Two Pseudomonas aeruginosa Strains with Different Uptake Modes

机译：两种吸收方式不同的铜绿假单胞菌菌株对石油烃的生物降解

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摘要

The uptake modes of alkanes by two strains (Pseudomonas aeruginosa S and Pseudomonas aeruginosa Y) were compared in this article. It was found that the strain of P. aeruginosa S showed low cell surface hydrophobicity and the surface tension of the broth decreased when the strain was cultivated on alkanes. On the contrary, P. aeruginosa Y showed higher cell surface hydrophobicity and the change in surface tension was not significant. This suggests that P. aeruginosa Y accessed hydrocarbon droplets by direct contact mode, while P. aeruginosa S engaged hydrocarbon droplets by biosurfactant-medium mode. The biodegradation of petroleum hydrocarbons by the two strains was also investigated. The results showed that irrespective of the substrate utilized: liquid hydrocarbons, solid hydrocarbons or crude oil in contaminated soil, the degradation by P. aeruginosa S was faster than that by P. aeruginosa Y. It was also deduced that the produced biosurfactant is advantageous in improving the biodegradation process.
机译：本文比较了两种菌株（铜绿假单胞菌S和铜绿假单胞菌Y）对烷烃的吸收方式。发现铜绿假单胞菌菌株在烷烃上培养时细胞表面疏水性低，肉汤的表面张力降低。相反，铜绿假单胞菌Y显示较高的细胞表面疏水性，并且表面张力的变化不明显。这表明铜绿假单胞菌Y通过直接接触模式进入烃液滴，而铜绿假单胞菌S通过生物表面活性剂-介质模式与烃液滴结合。还研究了两种菌株对石油烃的生物降解作用。结果表明，无论使用何种底物：污染土壤中的液态碳氢化合物，固态碳氢化合物或原油，铜绿假单胞菌S的降解速度均比铜绿假单胞菌Y更快。改善生物降解过程。

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