硝基苯污染地表水的生物修复模拟研究  

Simulated bioremediation of surface water polluted with nitrobenzene

作　　者：李明堂[1] 张秀芳[2] 盛连喜[1] 徐镜波[1] 

机构地区：[1]东北师范大学城市与环境科学学院,吉林长春130024 [2]吉林农业大学资源与环境学院,吉林长春130118

出　　处：《东北师大学报（自然科学版）》2008年第1期131-135,共5页Journal of Northeast Normal University(Natural Science Edition)

基　　金：国家重点基础研究发展计划(973)项目(2004CB418505);国家自然科学基金资助项目(30370262);高等学校博士学科点专项科研基金资助项目(20040200002)

摘　　要：研究了一株硝基苯高效降解菌恶臭假单胞菌在微宇宙模拟系统和卵石接触生物氧化法模拟系统中对硝基苯的降解作用.结果表明,在微宇宙模拟系统中适宜降解的温度为25℃～30℃,pH值为7.0～8.0.在此条件下,8d内能够将10mg/L的硝基苯完全降解.底泥和光照条件能明显促进硝基苯的降解,硝基苯降解产物亚硝酸根离子在模拟系统中会被其他的生物利用,积累量相对减少.低温下,虽然硝基苯的降解率较低,但降解菌对硝基苯仍保持一定的降解活性.在卵石接触生物氧化法模拟系统中,降解菌菌膜对水中硝基苯的去除产生了非常明显的作用,但易发生菌膜脱落现象.实验结果可为硝基苯微污染地表水和突发性事故造成的污染环境的微生物修复提供基本的理论和实践依据.This paper studied the biodegradation of nitrobenzene （NB） in microcosm and pebble contact biological oxidation systems by a Pseudomonas putida strain. Results showed that the satisfactory temperature and pH values for the biodegradation of NB ranged from 25℃ to 30℃ and 7.0 to 8.0, respectively. Under the conditions, NB at the concentration of 10 mg/L was degraded in 8 days. Sediment and lightening could accelerate the biodegradation of NB. NO2 released from the biodegradation of NB was utilized by other microorganisms. The strain still remained the capability to degrade NB under lower temperature, but the biodegradation rate was low. In the pebble contact biological oxidation system, bio-membrane of degrading bacteria quickly removed NB from the water in the early period. Experimental data could offer useful practical and theoretic support for the bioremediation of surface water polluted by trace NB and unexpected pollution by NB by accident.

关 键 词：微宇宙 卵石接触生物氧化法 生物修复 硝基苯 

分 类 号：X506[环境科学与工程—环境工程]