表面活性剂对Bacillus pumilus strain Bap9降解苯并[a]芘的影响  

Effect of surfactants on biodegradation of benzo[a]pyrene by Bacillus pumilus strain Bap9

作　　者：朱婷婷[1,2] 倪晋仁[2] 

机构地区：[1]深圳市环境科学研究院,国家环境保护饮用水水源地管理技术重点实验室,深圳518001 [2]北京大学深圳研究生院环境与能源学院,城市人居环境科学与技术重点实验室,深圳518055

出　　处：《环境工程学报》2012年第9期3344-3348,共5页Chinese Journal of Environmental Engineering

基　　金：“十一五”国家科技支撑计划项目(2006BAB04A14)

摘　　要：研究了非离子型表面活性剂Triton X-100(TX-100)和Tween80(TW-80)对苯并[a]芘的增溶特性及对苯并[a]芘高效降解菌Bacillus pumilus strain Bap9生长的影响,结果表明,2种表面活性剂对苯并[a]芘均有良好的增溶效果,均能作为碳源和能源被菌株Bap9所利用,TX-100增溶能力和增殖能力相对更强;不同浓度的TX-100对菌株降解苯并[a]芘的影响不同,当浓度为1 000 mg/L时,对降解的促进作用最强,可将苯并[a]芘降解率提高20.8%;在苯并[a]芘降解过程中,TX-100亦能作为碳源被菌株Bap9利用,不产生二次污染,因此可用于苯并[a]芘污染环境的生物修复。The impacts of two nonionic surfactants（TX-100 and TW-80） on the solubility of benzo[a]pyrene（BaP） and biomass production of Bacillus pumilus strain Bap9 were studied.Results show that TX-100 and TW-80 were not toxic to the BaP-degrading strain Bap9,and both of them could greatly increase the solubility of BaP when their concentration were above the critical micelle concentration（CMC）.TX-100 is more effective than TW-80 in increasing solubility of BaP and proliferation of strain Bap9.The effect of degradation was best when the concentration of TX-100 reached 1000 mg/L,which increased 20.8% of the degradation rate.During the biodegradation of BaP,TX-100 could be utilized by the strain Bap9 as carbon source and would not produce any secondary pollution.As a result,TX-100 has considerable potential for the bioremediation of BaP in polluted soils and water.

关 键 词：苯并[A]芘 非离子表面活性剂 BACILLUS pumilus STRAIN Bap9 生物降解 

分 类 号：X172[环境科学与工程—环境科学]