摘要
利用Fe0/厌氧微生物联合体系降解硝基苯(NB),结果显示,Fe0与厌氧微生物之间存在明显的协同效应,硝基苯的降解效果随零价铁投加量的增加而提高;最佳pH值为5.0～6.0;添加少量共代谢初级基质(葡萄糖),可以大幅度提高硝基苯的降解;较高浓度铁离子对硝基苯的降解表现出一定的抑制作用,添加0.5mg/L的Fe3+或Fe2+可以加快硝基苯的降解。硝基苯降解的主要产物为苯胺,降解过程遵循一级动力学模型,一级反应速率常数k值随硝基苯浓度的提高而降低。
The degradation of nitrobenzene（NB） using a combination of Fe^0 and anaerobic microorganism was studied. Nitrobenzene could be degraded effectively and the synergistic effect between Fe^0 and anaero- bic microorganism was apparent, and the nitrobenzene removal efficiency increased with the increasing of Fe^0; the optimum pH was 5.0-6.0; as co-metabolizing substrate, glucose could promote the degradation of nitrobenzene; In case of high concentration of Fe^2＋ and Fe^3＋, the anaerobic biodegradation activity of nitro- benzene were inhibited in a certain degree; 0.5 mg/L Fe^2＋ and Fe^3＋ were the optimum to accelerate biodeg- radation rate of nitrobenzene; the degradation kinetics of nitrobenzene were followed by first-order reaction, reaction rate constant reduced along with the concentration of nitrobenzene increased.
出处
《微生物学通报》
CAS
CSCD
北大核心
2009年第2期160-164,共5页
Microbiology China
基金
湖南省自然科学基金资助项目(No.08JJ6003)
关键词
硝基苯
生物降解
零价铁
厌氧微生物
Nitrobenzene, Microdegradation, Zero-valent Iron, Anaerobic microbial
