摘要
自南京化工厂下水道底泥和废水处理系统曝气池活性污泥中驯化分离得到一株能快速降解硝基苯的菌株,初步鉴定其为不动杆菌属菌株。该菌株降解硝基苯的最适宜环境条件为温度25℃～35℃,pH7～8,振荡速率大于120r/m。在适宜环境条件下,该菌株能够在24h内全部降解初始浓度不超过400mg/L的硝基苯,该浓度范围内硝基苯的降解过程符合零级动力学特征;当硝基苯的初始浓度超过400mg/L时,降解菌的生长受到毒害作用,该浓度范围内硝基苯的降解在开始有一个明显的停滞期,降解过程不再符合零级或一级动力学特征。
This paper reported on screening a strain for effectively degrading nitrobenzene, which was isolated from the activated sludge from a chemical factory and tentatively identified as Acinetobacter species. Based on the experiment, the optimum conditions for degradation of nitrobenzene were:25～35℃,pH7～8 and at least 120 r/m of shake speed. The experimental result showed under favorable conditions the strain's complete degradation of nitrobenzene with the initial concentration below 400 mg/L. It also showed that nitrobenzene concentrations of more than 400 mg/L inhibited growth of the bacteria.
出处
《环境科学与技术》
CAS
CSCD
2003年第4期1-2,58,共3页
Environmental Science & Technology
基金
国家自然科学基金项目(20077013)
关键词
硝基苯
动杆菌
降解
动力学特征
nitrobenzene
Acinetobacter
degradation
reaction model
