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首页> 外文期刊>Chemosphere >Advanced oxidation and reduction process chemistry of methyl tert-butyl ether (MTBE) reaction intermediates in aqueous solution: 2-Methoxy-2-methyl-propanal, 2-methoxy-2-methyl-propanol, and 2-methoxy-2-methyl-propanoic acid
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Advanced oxidation and reduction process chemistry of methyl tert-butyl ether (MTBE) reaction intermediates in aqueous solution: 2-Methoxy-2-methyl-propanal, 2-methoxy-2-methyl-propanol, and 2-methoxy-2-methyl-propanoic acid

机译:甲基叔丁基醚(MTBE)反应中间体在水溶液中的高级氧化和还原过程化学:2-甲氧基-2-甲基丙醛,2-甲氧基-2-甲基丙醇和2-甲氧基-2-甲基丙醇丙酸

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摘要

Absolute rate constants for the reaction of three important degradation products of methyl-tert-butyl ether (MTBE) with the hydroxyl radical, hydrated electron and hydrogen atom were determined in aqueous solution at room temperature. These three intermediate species; 2-methoxy-2-methyl propanal (MMP), 2-methoxy-2-methyl-propanol (MMP-OH) and 2-methoxy-2-methyl-propionic acid (MMP-acid), are formed in the degradation of MTBE under advanced oxidation and reduction process conditions. The rate constants for their hydroxyl radical oxidation of (3.99 ± 0.29) × 10~9, (8.02 ±0.53) × 10~8, and (7.73 ± 0.48) × 10~8 M~(-1) s~(-1) respectively, show that this reaction would be the overall dominant degradation pathway for these three compounds, relative to their corresponding hydrated electron reduction values of (3.11 ±0.32) × 10~7, (7.8 ± 1.8) ± 10~6 and (1.40±0.10) ± 10~9 M~(-1) s~(-1), and hydrogen atom rate constants of (1.65 ±0.14) × 10~7, (1.30 ±0.13) × 10~8 and < 1.2 × 10~6M~(-1) s~(-1).
机译:在室温下,确定了甲基叔丁基醚(MTBE)的三种重要降解产物与羟基,水合电子和氢原子反应的绝对速率常数。这三个中间物种;在MTBE降解过程中形成了2-甲氧基-2-甲基丙醛(MMP),2-甲氧基-2-甲基丙醇(MMP-OH)和2-甲氧基-2-甲基丙酸(MMP-酸)在先进的氧化和还原工艺条件下。羟基自由基氧化的速率常数为(3.99±0.29)×10〜9,(8.02±0.53)×10〜8和(7.73±0.48)×10〜8 M〜(-1)s〜(-1 )分别表明,相对于它们相应的水合电子还原值(3.11±0.32)×10〜7,(7.8±1.8)±10〜6和(1.40),该反应将是这三种化合物的总体主要降解途径±0.10)±10〜9 M〜(-1)s〜(-1),氢原子速率常数为(1.65±0.14)×10〜7,(1.30±0.13)×10〜8和<1.2×10 〜6M〜(-1)s〜(-1)。

著录项

  • 来源
    《Chemosphere》 |2009年第10期|1352-1357|共6页
  • 作者单位

    Department of Chemistry and Biochemistry, California State University at Long Beach, Long Beach, CA 90840, USA;

    Department of Chemistry and Biochemistry, University of North Carolina at Wilmington, Wilmington, NC 28409, USA NOAA/NOS Center for Coastal Fisheries and Habitat Research, Beaufort, NC 28516, USA;

    Department of Chemistry and Biochemistry, Florida International University, Miami, FL 33199, USA Department of Civil and Environmental Engineering, University of California at Irvine, Irvine, CA 92697, USA;

    Department of Chemistry and Biochemistry, Florida International University, Miami, FL 33199, USA;

    Radiation Laboratory, University of Notre Dame, Notre Dame, IN 46556, USA;

    Department of Civil and Environmental Engineering, University of California at Irvine, Irvine, CA 92697, USA;

  • 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

    MTBE; AOP degradation; radical kinetics; hydroxyl radical; oxidation; reduction;

    机译:MTBE;AOP降解;自由基动力学羟基氧化减少;

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