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Efficient degradation of Orange G with persulfate activated by recyclable FeMoO_4

机译：可回收FeMoO_4活化的过硫酸盐可有效降解橙G

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摘要

In this study, FeMoO4 was applied to activate persulfate (PS, S2O82-) for azo dye Orange G (OG) degradation. The catalyst was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and nitrogen adsorption-desorption isotherms. FeMoO4 showed excellent efficiency in activating PS for OG removal. More than 95% could be removed after 40 mM under reaction conditions of 4 mM PS, 0.3 g L-1 FeMoO4 and 0.2 mM OG. The effect of different parameters (PS doses, FeMoO4 doses and pH) were evaluated. The results showed that acid condition provided higher efficiency and overdosing FeMoO4 and PS presented a scavenging effect. Major intermediates were identified and possible degradation pathway was proposed. Recycle tests presented that FeMoO4 had excellent recyclable stability in activating PS for OG removal. Sulfate radicals and hydroxyl radicals all occurred in the oxidation reactions and the former came first. The oxidation reaction was involved in the translation of Fe2+/Fe3+ occurred on the surface layer. This study revealed that the FeMoO4/PS system is a very promising method for degrading organic contaminants in the environment. (C) 2018 Elsevier Ltd. All rights reserved.
机译：在这项研究中，FeMoO4用于活化过硫酸盐（PS，S2O82-），以降解偶氮染料Orange G（OG）。通过X射线衍射（XRD），扫描电子显微镜（SEM），透射电子显微镜（TEM），X射线光电子能谱（XPS）和氮吸附-脱附等温线对催化剂进行了表征。 FeMoO4在激活PS去除OG方面显示出出色的效率。 40 mM后，在4 mM PS，0.3 g L-1 FeMoO4和0.2 mM OG的反应条件下，可以去除95％以上。评估了不同参数（PS剂量，FeMoO4剂量和pH）的影响。结果表明，酸性条件提供了更高的效率，而过量的FeMoO4和PS表现出清除作用。确定了主要中间体，并提出了可能的降解途径。回收测试表明，FeMoO4在激活PS去除OG方面具有出色的可回收稳定性。硫酸根和羟基都发生在氧化反应中，前者排在第一位。氧化反应参与了表面层上发生的Fe2 + / Fe3 +的翻译。这项研究表明，FeMoO4 / PS系统是降解环境中有机污染物的非常有前途的方法。 （C）2018 Elsevier Ltd.保留所有权利。

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  • 来源
    《Chemosphere》 |2019年第1期|642-650|共9页
  • 作者

    Lin Xueming; Ma Yongwen; Wan Jinquan; Wang Yan; Li Yongtao;

  • 作者单位

    South China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510640, Guangdong, Peoples R China;

    South China Univ Technol, Sch Environm & Energy, Guangzhou 510006, Guangdong, Peoples R China;

    Guangdong Plant Fiber High Valued Cleaning Utiliz, Guangzhou 510006, Guangdong, Peoples R China;

    South China Agr Univ, Joint Inst Environm Res & Educ, Guangzhou 510640, Guangdong, 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《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    FeMoO4; Persulfate; Orange G; Degradation; Mechanism;

    机译：FeMoO4;过硫酸盐;橙色G;降解;机理;

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