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首页> 外文期刊>Environmental Science & Technology >Cathode-Introduced Atomic H~* for Fe(Ⅱ)-Complex Regeneration to Effective Electro-Fenton Process at a Natural pH
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Cathode-Introduced Atomic H~* for Fe(Ⅱ)-Complex Regeneration to Effective Electro-Fenton Process at a Natural pH

机译：用于Fe（Ⅱ）的阴极引入的原子H〜*用于自然pH的有效电芬工艺的Fe（Ⅱ）

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摘要

Promotion of iron solubility using ligands is the preliminary step in the homogeneous electro-Fenton (EF) process at a mild pH, but the chelate efficiencies of most organic ligands are unsatisfactory, resulting in insufficient Fe(II) availability. In this study, atomic H* was, for the first time, introduced to the EF process to accelerate the regeneration of the Fe(II)-complex at a mild pH using a Ni-deposited carbon felt (Ni-CF) cathode. The introduction of atomic H* significantly elevated total organic carbon (TOC) abatement of ciprofloxacin (CIP) from 42% (CF) to 81% (Ni-CF) at a natural pH. In the presence of humic acids (HAs), atomic H* introduced via Ni-CF enhanced the CIP degradation rate to 10 times that of the CF at a mild pH. The electron spin resonance (ESR), density functional theory (DFT) calculations, electrochemical characterization, and in situ electrochemical Raman study clearly demonstrated that the atomic H* generated from the Ni-CF cathode was highly efficient at reducing Fe(III)-complexes at a natural pH. Additionally, the Ni-CF could generate atomic H* without significant nickel leaching. Thus, the atomic H* could continuously facilitate iron cycling and, consequently, enhance pollutant mineralization via the homogeneous EF process at a mild pH in an environmentally friendly manner.
机译：使用配体促进铁溶解度是在轻度pH下均匀电 - 芬顿（EF）过程中的初步步骤，但大多数有机配体的螯合效率是不令人满意的，导致Fe（II）的不充分可用性。在本研究中，原子H *首次引入EF过程中，以加速Fe（II）的再生​​ - 使用Ni沉积的碳毡（Ni-CF）阴极在轻度pH下。原子H *的引入在天然pH下显着升高了环丙沙星（CIP）的总有机碳（CIP）至81％（Ni-CF）。在腐殖酸（具有）的存在下，通过Ni-CF引入的原子H *将CIP降解速率提高至CF在轻度pH下的10倍。电子旋转共振（ESR），密度函数理论（DFT）计算，电化学表征和原位电化学拉曼研究清楚地证明，从Ni-CF阴极产生的原子H *在减少Fe（III）中高效在天然pH值。另外，Ni-CF可以产生原子H *而没有显着的镍浸出。因此，原子H *可以连续促进铁循环，并且因此，通过以环境友好的方式在轻度pH下通过均匀的EF工艺提高污染物矿化。

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  • 来源
    《Environmental Science & Technology》 |2019年第12期|6927-6936|共10页
  • 作者

    Liu Xiao-Cheng; Li Wen-Qiang; Wang Yi-Ran; Zhou Guan-Nan; Wang Yi-Xuan; He Chuan-Shu; Wang Gong-Ming; Mu Yang;

  • 作者单位

    Univ Sci & Technol China Dept Appl Chem CAS Key Lab Urban Pollutant Convers Hefei 230026 Anhui Peoples R China;

    Univ Sci & Technol China Dept Appl Chem CAS Key Lab Urban Pollutant Convers Hefei 230026 Anhui Peoples R China;

    Univ Sci & Technol China Dept Appl Chem CAS Key Lab Urban Pollutant Convers Hefei 230026 Anhui Peoples R China;

    Univ Sci & Technol China Dept Appl Chem CAS Key Lab Urban Pollutant Convers Hefei 230026 Anhui Peoples R China;

    Univ Sci & Technol China Dept Appl Chem CAS Key Lab Urban Pollutant Convers Hefei 230026 Anhui Peoples R China;

    Univ Sci & Technol China Dept Appl Chem CAS Key Lab Urban Pollutant Convers Hefei 230026 Anhui Peoples R China;

    Univ Sci & Technol China Dept Appl Chem Hefei 230026 Anhui Peoples R China;

    Univ Sci & Technol China Dept Appl Chem CAS Key Lab Urban Pollutant Convers Hefei 230026 Anhui Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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