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首页> 外文期刊>Environmental Science & Technology >Does Terr-Butyl Alcohol Really Terminate the Oxidative Activity of ~·OH in Inorganic Redox Chemistry?
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Does Terr-Butyl Alcohol Really Terminate the Oxidative Activity of ~·OH in Inorganic Redox Chemistry?

机译：他在无机氧化还原化学中真正终止〜哦的氧化活性吗？

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摘要

The hydroxyl radical, ~·OH, is one of the most reactive free radicals and plays significant roles in the oxidative degradation of organic pollutants and the electron transfer of inorganic ions in natural and engineered environmental processes. To quantitatively determine the contribution of ~·OH to oxidative reactions, a specific scavenger, such as tert-butyl alcohol (TBA), is usually added to eliminate ~·OH effects. Although TBA is commonly assumed to transform ~·OH into oxidatively inert products, this study demonstrates that utilizing TBA as an ~·OH scavenger generates the secondary peroxyl radical (ROO~·), influencing the oxidation of transition metals, such as Mn. Although ROO~· is less reactive than ~·OH, it has an extended half-life and a longer diffusion distance that enables more redox reactions, such as the oxidation of Mn~(2+)(aq) to Mn~Ⅳ oxide solids. In addition to promoting Mn~(2+)(aq) oxidation kinetics, TBA can also affect the crystalline phases, oxidation states, and morphologies of Mn oxide solids. Thus, the oxidative roles of ~·OH in aqueous redox reactions cannot be examined simply by adding TBA: the effects of secondary ROO~· must also be considered. This study urges a closer look at the potential formation of secondary radicals during scavenged oxidative reactions in environmental systems.
机译：羟基自由基，〜哦，是最具活力的自由基之一，并在有机污染物的氧化降解和自然和工程环境过程中无机离子的电子转移起着显着的作用。为了定量地确定〜·OH对氧化反应的贡献，通常加入特定清除剂，例如叔丁醇（TBA）以消除〜oh效应。尽管TBA通常被认为将〜oh转化为氧化惰性产品，但该研究表明，利用TBA作为〜·OH清除剂产生次级过氧基（ROO〜·），影响过渡金属的氧化，例如Mn。虽然ROO〜·反应性低于〜哦，但它具有延长的半衰期和更长的扩散距离，使得能够更氧化还原反应，例如Mn〜（2 +）（aq）的氧化至mn〜α氧化物固体。除了促进Mn〜（2 +）（AQ）氧化动力学之外，TBA还可以影响Mn氧化物固体的结晶相，氧化状态和形态。因此，通过添加TBA，不能仅通过添加TBA来检查〜oh在氧化还原反应中的氧化作用：也必须考虑二次roo〜········该研究敦促仔细看看在环境系统中清除的氧化反应期间二次自由基的潜在形成。

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  • 来源
    《Environmental Science & Technology》 |2021年第15期|10442-10450|共9页
  • 作者

    Zhenwei Gao; Dandan Zhang; Young-Shin Jun;

  • 作者单位

    Department of Energy Environmental and Chemical Engineering Washington University in St. Louis St. Louis Missouri 63130 United States;

    Department of Energy Environmental and Chemical Engineering Washington University in St. Louis St. Louis Missouri 63130 United States;

    Department of Energy Environmental and Chemical Engineering Washington University in St. Louis St. Louis Missouri 63130 United States;

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

    ~·OH scavenger; Tert-butyl alcohol; secondary peroxyl radical; Mn~(2+) oxidation; photochemistry;

    机译：〜哦;清道夫;叔丁醇;二级过氧基自由基;Mn〜（2+）氧化;光化学;

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