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Influencing factors for the Fenton-like of biological sponge iron system and its degradation mechanism of aniline

机译：生物海绵铁系统的芬顿原因的影响因素及其苯胺的降解机制

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摘要

The application of zero-valent iron (ZVI) coupled with microorganisms, has gained considerable attention in recent years for eliminating recalcitrant organic matters from wastewater. Nevertheless, there are no general conclusions regarding the degradation mechanism and the operating variables. In this paper, sponge iron (SFe, a kind of ZVI) has been submerged to the activated sludge process to develop a biological sponge iron system (SFe-M). The treatment impact of SFe-M system on aniline (AN) wastewater under the optimal conditions was significantly better than that of the general activated sludge system. In the SFe-M system, the variation trends of hydroxyl radicals (center dot OH) production were consistent with those of Fe(II), and the hydrogen peroxide concentration was approximately twice as high as the sum of activated sludge system and the SFe system. Both SFe and microorganisms could induce Fenton-like reactions directly or indirectly. This contributed to the production of center dot OH that constantly attacked the benzene ring and the amino group. It resulted in some nitrogen in AN released in the form of ammonia ions. Moreover, microorganisms could also use the mass and electrons during the AN conversion process. The AN was eventually oxidized to carbon dioxide.
机译：零价铁（ZVI）与微生物相结合的应用，近年来近年来对废水顽固有机物进行了相当大的关注。然而，没有关于降解机制和操作变量的一般性结论。在本文中，海绵铁（SFE，一种ZVI）已被浸没在激活的污泥过程中以开发生物海绵铁系统（SFE-M）。 SFE-M系统在最佳条件下对苯胺（AN）废水的处理影响明显优于一般活性污泥系统的废水。在SFE-M系统中，羟基自由基（中心点OH）生产的变化趋势与Fe（II）的氢气相一致，过氧化氢浓度大约是活性污泥系统和SFE系统总和的两倍。 。 SFE和微生物均可直接或间接诱导FENTON样反应。这有助于生产中心点哦，不断攻击苯环和氨基。它导致一些以氨离子的形式释放的一些氮。此外，微生物也可以在转换过程中使用质量和电子。将A最终被氧化成二氧化碳。

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  • 来源
    《Process Biochemistry》 |2021年第2期|230-236|共7页
  • 作者

    Xie Hui-na; Li Jie; Wang Ya-e; Zhao Wei; Zhang Li-hong; Li Jing;

  • 作者单位

    Lanzhou Jiaotong Univ Sch Environm & Municipal Engn Lanzhou 730070 Gansu Peoples R China;

    Lanzhou Jiaotong Univ Sch Environm & Municipal Engn Lanzhou 730070 Gansu Peoples R China;

    Lanzhou Jiaotong Univ Sch Environm & Municipal Engn Lanzhou 730070 Gansu Peoples R China;

    Lanzhou Jiaotong Univ Sch Environm & Municipal Engn Lanzhou 730070 Gansu Peoples R China;

    Lanzhou Jiaotong Univ Sch Environm & Municipal Engn Lanzhou 730070 Gansu Peoples R China|Gansu Membrane Sci & Technol Res Inst Co Ltd Lanzhou 730020 Gansu Peoples R China;

    Lanzhou Jiaotong Univ Sch Environm & Municipal Engn Lanzhou 730070 Gansu Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Sponge iron; Zero-valent iron; Biological sponge iron system; Aniline; Fenton-like;

    机译：海绵铁;零价铁;生物海绵铁系统;苯胺;芬顿般的;

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