两株多环芳烃降解菌对菲、蒽、苯并菲的降解效果

摘要

The authors filtered out two PAHs-degradating bacteria from automobile exhausted pollution soil (named Y1 and W1),and analyzed degradation rate of different concentrations of phenanthrene,anthrancene,triphenylene to provide the basic data and reference for microbial remediation of soil polluted by PAHs.The results showed that 25 mg/L and 50 mg/L were the optimum concentrations for phenanthrene degraded by Y1 and W1 respectively,50 mg/L was the optimum concentration for anthracene and triphenylene degraded by Y1 and Wl.With the optimum concentration,for Y1 the degradation rates were 30％,57.8％ and 65％ for phenanthrene,anthracene and triphenylene respectively by Y1 after 10 days,65.4％,82％ and 90％ after 25 days.For W1,they were 40％,70％ and 53％ after 10 days,68.4％,92％ and 76％ after 25 days.The degradation rate reached 100％ for phenanthrene,anthracene and triphenylene respectively by W1 and Y1 after 60 days.%为给微生物修复多环芳烃污染的土壤提供基础数据和参考,从汽车尾气污染土壤中筛选出两株多环芳烃降解菌(Y1和W1),分析了二者对不同浓度的菲、蒽和苯并菲溶液的降解率.结果表明.Y1和W1对菲的最适降解浓度分别为25 mg/L和50 mg/L,对蒽、苯并菲的最适降解浓度为50 mg/L;在菲、蒽、苯并菲溶液最适浓度下,Y1在10 d后对菲、蒽和苯并菲的降解率分别达到30.0％、57.8％和65.0％,25 d后分别达65.4％、82.0％和90.0％；W1在10 d后对菲、蒽和苯并菲的降解率分别达40.0％、70.0％和53.0％,25 d后分别达68.4％、92.0％和76.0％.培养60 d后,Y1和W1对菲、蒽和苯并菲的降解率均达到100.0％.