| 以喹啉或吲哚为单一碳源时反硝化过程中亚硝酸盐的积累 |
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| 引用本文： | 田建强,李咏梅.以喹啉或吲哚为单一碳源时反硝化过程中亚硝酸盐的积累[J].环境科学学报,2009,29(1):68-74. |
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| 作者姓名： | 田建强 李咏梅 |
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| 作者单位： | 同济大学污染控制与资源化研究国家重点实验室,上海,200092 |
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| 摘 要： | 分别以喹啉或吲哚为单一碳源和电子供体,硝酸盐为电子受体,对反硝化过程中亚硝酸盐(NO2--N)的积累进行了试验研究.结果表明,以喹啉为碳源时,在不同碳氮比(C/N)条件下反硝化过程中均出现明显的NO2--N积累;而且其最高积累率随着C/N比增大而降低,当C/N比为2.5时,NO2--N最高积累率达93.97%,当C/N比为12.8时NO2--N最高积累率为42.31%.而以吲哚为碳源时,在不同C/N比条件下反硝化过程中NO2--N积累程度都很低,最高积累率只有4.71%.以喹啉为单一碳源时,亚硝酸盐的还原速率小于硝酸盐的还原速率;而以吲哚为单一碳源时,亚硝酸盐的还原速率大于硝酸盐的还原速率;上述硝酸盐与亚硝酸盐还原速率的不同导致了以喹啉或吲哚分别为碳源时反硝化过程中亚硝酸盐积累率的不同.基于碳源完全降解和完全反硝化的考虑,以喹啉或吲哚为单一碳源时的最佳碳氮比均为6.8.
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| 关 键 词： | 喹啉 吲哚 反硝化 亚硝酸盐积累 C/N比 |
| 收稿时间： | 1/31/2008 1:53:24 AM |
| 修稿时间： | 5/22/2008 3:19:18 PM |
Nitrite accumulation during denitrification with quinoline or indole as the sole carbon source |
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| TIAN Jianqiang and LI Yongmei.Nitrite accumulation during denitrification with quinoline or indole as the sole carbon source[J].Acta Scientiae Circumstantiae,2009,29(1):68-74. |
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| Authors: | TIAN Jianqiang and LI Yongmei |
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| Institution: | TIAN Jianqiang,LI YongmeiState Key Laboratory of Pollution Control , Resources Reuse,Tongji University,Shanghai 200092 |
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| Abstract: | Batch experiments were conducted to investigate nitrite(NO-2-N) accumulation during denitrification with quinoline or indole as the sole carbon source and electron donor and nitrate(NO-3-N) as the electron acceptor.Significant NO-2-N accumulation was observed at all tested C/N ratios when quinoline was used as the sole carbon source,and the maximum NO-2-N accumulation percentage decreased with the increase of C/N ratio.While the maximum NO-2-N accumulation percentage reached 93.97% at C/N=2.5,it was only 42... |
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| Keywords: | quinoline indole denitrification nitrite accumulation C/N ratio |
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