生物表面活性剂和化学表面活性剂对多环芳烃蒽的生物降解作用研究

Difference of Biodegradation Processes of Anthracene in the Presence of Biosurfactants and Chemical Surfactants

在非常高的蒽浓度下,用高效液相色谱测定了不同的表面活性剂条件下蒽高效降解菌降解蒽的情况。结果表明,使用表面活性剂能极大地促进蒽的降解,而相同条件下生物表面活性剂效果要优于化学表面活性剂。在不加表面活性剂、加入十二烷基磺酸钠、加入吐温-20及加入生物表面活性剂产生菌四种情况下,经过6d的降解,蒽的浓度分别从250μg·mL-1降至214,199.2,138.7和114.8μg·mL-1,分别降解了36,50.4,111.3和135.2μg·mL-1,显示了极强的降蒽能力。说明使用单一的降解菌效果不太明显,将蒽降解菌和产表面活性剂产生菌接合构成一个混合菌群使用时,效果非常明显。

Biodegradation for polycyclic aro ma tic hydrocarbons(PAHs )is very diverse.As bioremediation b y surfactants is o ften used to accelerate solubility of PAH s,we researched anthracene' s degrada tion in the presence of diff erent surfactants.The results indicated that using surfactants wa s able to accelerate the degradation of PAHs greatly.In the mea ntime,the Biosurfactants exhibited an excellent efficacy than did chemi cal sur factants.For example,in the presence of no surfactants,added SD S,added Twee n-20and inoculated bacteria which can pr oduce surfanctants,after 6days,t h e corresponding concentration of an thracene was reduced from initial 250穖L-1 to 214靏穖L-1 ,199.2靏穖L-1 ,138.7靏穖L-1 and 114.8靏穖L-1 ,respectively,showing strongly ability of degradation of anthracene by the added xenobiotics.