微生物异化还原铁氧化物体系对硝基苯的降解作用

Degradation of nitrobenzene by bacterial dissimilatory reduction of iron oxides

对地下环境中铁氧化物的生物异化还原作用及其降解硝基苯的特性和效果进行了实验研究.结果表明,铁还原菌对硝基苯具有一定的降解能力,100h后硝基苯降解率>68.5%.微生物异化还原铁氧化物过程对硝基苯具有较好的降解作用,当针铁矿浓度为0.3mg/L时,协同降解效果最好,硝基苯降解率为78.5%.微生物的生长与铁氧化物的还原及硝基苯的降解之间具有明显的相关性.

Experiments were conducted to investigate the biological dissimilatory reduction process of iron oxides and characteristics and efficiency of nitrobenzene degradation in subsurface environment. The results indicated that iron reducing microbial could degrade nitrobenzene; and the nitrobenzene removal efficiency was over 68.5% in 100h. Nitrobenzene showed higher removal efficiency in the bacterial dissimilatory reduction process of iron oxides; the maximum removal efficiency was observed at the goethite concentration of 0.3mg/L, and it was up to 78.5%. There was an apparently correlation between iron oxides reduction and nitrobenzene degradation.