Fe(EDTA)溶液同时去除 SO 和 NO：Mn 粉的促进作用及还原机理。
Simultaneous removal of SO and NO by Fe(EDTA) solution: promotion of Mn powder and mechanism of reduction.
机构信息
College of Environment, Zhejiang University of Technology, Hangzhou, 310032, People's Republic of China.
Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, Zhejiang University of Technology, Hangzhou, 310032, People's Republic of China.
出版信息
Environ Sci Pollut Res Int. 2019 Oct;26(28):28808-28816. doi: 10.1007/s11356-019-06067-0. Epub 2019 Aug 3.
The effect of Mn powder addition on the simultaneous removal of SO and NO coupled with Fe(EDTA) absorption was investigated in this work. In the NO absorption system with Fe(EDTA), SO reduced Fe(EDTA)-NO to Fe(EDTA) with a reduction efficiency reaching 88.5% under the conditions of 4000 mg/m SO, pH 8.0, 44 °C, and the flow rate of 1.2 L/min within 60 min. Introducing 0.1 M Mn powder with SO increased the Fe(EDTA)-NO reduction efficiency to 96.8% within 5 min. SO was also removed by reducing Fe(EDTA)-NO and converted into SO at a removal efficiency of 100%. After adding Mn powder, NO was removed through the following reaction: [Formula: see text]. Mn powder functioned as a reductant to regenerate the absorption of solution, and the coordinated NO in Fe(EDTA)-NO was reduced to NH. The resource utilization rate of N reached approximately 77.2%. The integrated technology is a potential solution for flue gas treatment in industrial sectors with coal-fired power plants and industrial boiler. Graphical abstract.
本工作研究了 Mn 粉添加对 Fe(EDTA)吸收同时去除 SO 和 NO 的影响。在 Fe(EDTA)的 NO 吸收体系中，SO 将 Fe(EDTA)-NO 还原为 Fe(EDTA)，在 4000mg/m3 SO、pH8.0、44°C 和 1.2L/min 流速下，60min 内的还原效率达到 88.5%。在 5min 内引入 0.1M Mn 粉可将 Fe(EDTA)-NO 的还原效率提高到 96.8%。SO 也通过还原 Fe(EDTA)-NO 并转化为 SO 而被去除，去除效率为 100%。添加 Mn 粉后，NO 通过以下反应去除：[公式：见文本]。Mn 粉作为还原剂再生溶液的吸收，Fe(EDTA)-NO 中的配位 NO 被还原为 NH。N 的资源利用率达到了约 77.2%。该综合技术是燃煤电厂和工业锅炉等工业部门烟气处理的潜在解决方案。
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