A new approach for Fe(III)EDTA reduction in NOx scrubber solution using bio-electro reactor
A new approach for Fe(III)EDTA reduction in NOx scrubber solution using bio-electro reactor
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DOI：
10.1016/j.biortech.2009.01.046
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发表时间：
2009-06-01
影响因子：
11.4
通讯作者：
Li, Wei
中科院分区：
文献类型：
--
作者：
Mi, Xu-Hong;Gao, Lin;Li, Wei
一种新的方法，用于去除NO，通过结合Fe（II）EDTA吸收和微生物还原已被证明，其中部分的Fe（II）EDTA将被氧化的氧气在烟道气中形成Fe（III）EDTA。在以前的研究中，已经发现菌株FR-2有效地还原Fe（III）EDTA。另外，有报道称生物电反应器可以有效地同时进行反硝化和金属离子去除。因此，本文提出了利用生物电反应器促进FR-2还原Fe（III）EDTA的方法。结果表明，在外加电流的作用下，Fe（III）EDTA的浓度迅速下降，随着电流密度的增大，Fe（III）EDTA的还原速率先增大后减小。通过环境扫描电镜（ESEM）观察电极上生物膜的形成。NaNO 2的存在明显降低了Fe（III）EDTA的还原速率。(C)2009爱思唯尔有限公司保留所有权利。
A new process for the removal of NO, by a combined Fe(II)EDTA absorption and microbial reduction has been demonstrated, in which part of the Fe(II)EDTA will be oxidized by oxygen in the flue gas to form Fe(III)EDTA. In former studies, strain FR-2 has been found to reduce Fe(III)EDTA efficiently. Otherwise, it has been reported that bio-electro reactor could efficiently provide a chance for simultaneous denitrification and metal ion removal. Therefore, a use of bio-electro reactor is suggested to promote the reduction of Fe(III)EDTA by strain FR-2 in this paper. The results showed that the concentration of Fe(III)EDTA decreased rapidly when electric current was applied, and that as the current density rose, the Fe(III)EDTA reduction rate increased while followed by a decrease afterward. The formation of the biofilm on the electrode was observed by ESEM (Environmental Scan Electro-Microscope). In addition, the Fe(III)EDTA reduction rate obviously decreased with the existence of NaNO2. (C) 2009 Elsevier Ltd. All rights reserved.