【摘要】 以菲 (PHE)为典型多环芳烃 (PAHs) ,利用PAHs优势降解菌 ,研究了非离子表面活性剂Tween2 0 (TW2 0 )对PAHs类疏水性有机物生物降解过程的影响 .结果表明 ,TW2 0对PHE具有较好的增溶效果 ;TW 2 0具有很好的生物降解性 ;不同浓度的TW2 0存在情况下 ,降解菌对PHE都有很好的去除效果 .TW 2 0可以用于PAHs污染的生物修复 .更多还原

【Abstract】 The objective of this study was to quantify the bioavailability of phenanthrene solubilized in surfactants by a mixed phenanthrene-degrading culture isolated from the petroleum contaminated soils. An nonionic surfactant, Tween20, was used. The effects of Tween20 on the microbial degradation of phenanthrene were evaluated depending on the rotary flasks experiments. The results showed that the concentrations of Tween20 above the critical micelle concentration (CMC) could increase the solubility of phenanthrene on great extent and were not toxic to the phenanthrene-degrading bacteria, and that the presence of surfactant micelles did not inhibit the biodegradation of phenanthrene. Phenanthrene solubilized in the micelles of Tween20 in liquid media was bioavailable and degradable by the mixed culture of bacteria.更多还原