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首页> 外文会议>2011 International Symposium on Water Resource and Environmental Protection >Kinetic analysis of coupled attenuation of nitrobenzene by microbial dissimilatory iron reduction in groundwater
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Kinetic analysis of coupled attenuation of nitrobenzene by microbial dissimilatory iron reduction in groundwater

机译：微生物异化铁还原地下水中硝基苯耦合衰减的动力学分析

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Coupled attenuation system consists of iron oxides, electron donor and iron reducing bacteria. The reaction rates would be influenced by the change of any related factors. Steady state experiments were performed to investigate coupled attenuation of nitrobenzene by microbial dissimilatory iron reduction. The removal efficiency of nitrobenzene(50mg/L) was up to 78.5% while the concentration of goethite at 0.3g/L in 100 hours; In the presence of 10 mmol/L electron donor, ammonium acetate, ammonium citrate and glucose control system, the reducing efficiency of nitrobenzene(50mg/L) reach 78.5%, 74.8%, 70.0% and 69.3%, respectively. Obviously, ammonium acetate was the dominant electron donor and nitrobenzene could be utilized by iron reducing bacteria significantly; At microbial concentration gradients was 0.5−8.0×108 cells ml−1,the reduction of nitrobenzene present a peak at 4.0×108cells ml−1. These results provide an evidence of coupled attenuation of organic pollution by microbial dissimilatory iron reduction.
机译：耦合衰减系统由氧化铁，电子给体和还原铁细菌组成。反应速率将受任何相关因素变化的影响。进行稳态实验以研究微生物异化铁还原对硝基苯的耦合衰减。 100小时内针铁矿浓度为0.3g / L时，硝基苯（50mg / L）的去除率高达78.5％。在10 mmol / L的电子给体，乙酸铵，柠檬酸铵和葡萄糖控制体系的存在下，硝基苯（50mg / L）的还原效率分别达到78.5％，74.8％，70.0％和69.3％。显然，乙酸铵是主要的电子供体，硝基苯可被还原铁细菌大量利用。在微生物浓度梯度为0.5-8.0×10 8 个细胞ml -1 时，硝基苯的还原在4.0×108个细胞ml -1 。这些结果提供了通过微生物异化铁还原对有机污染的耦合衰减的证据。

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