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首页> 外文期刊>Environmental Science & Technology >Response to Comment on 'Inhibitory Effect of Dissolved Silica on H_2O)2 Decomposition by Iron(Ⅲ) and Manganese(Ⅳ) Oxides: Implications for H_2O_2-Based In Situ Chemical Oxidation'
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Response to Comment on 'Inhibitory Effect of Dissolved Silica on H_2O)2 Decomposition by Iron(Ⅲ) and Manganese(Ⅳ) Oxides: Implications for H_2O_2-Based In Situ Chemical Oxidation'

机译：对“溶解的二氧化硅抑制铁（Ⅲ）和锰（Ⅳ）氧化物分解H_2O）2的反应：对基于H_2O_2的原位化学氧化的意义”的回应

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摘要

We thank Dr. Hanna for his comment1 on our recently published paper.2 Dr. Hanna has raised questions about: (a) the mechanism through which dissolved silica (SiO_2) inhibits hydrogen peroxide (H_2O_2) decomposition in our system; and, (b) the feasibility of using dissolved SiO_2 to stabilize H_2O_2 in in situ chemical oxidation (ISCO) systems. Here we address these questions in the sequence presented in his comment. Mechanism Through Which Dissolved SiO_2 Stabilizes H_2O_2. Dr. Hanna suggested that the slower rate of H_2O_2 decomposition observed in the presence of SiO_2 was due to interactions between dissolved SiO_2 and H_2O_2. In support of this assertion, Dr. Hanna cited refs 15-18 (numbers correspond to references in the comment), which involved the decomposition of H_2O_2 by transition metals. In our opinion, the slower H_2O_2 decomposition in the presence of dissolved SiO_2 observed in these studies was most likely due to SiO_2 decreasing the catalytic activity of the metals. This well-studied phenomenon is a much more rational explanation than the speculative interaction between SiO_2 and H_2O_2 invoked by Dr. Hanna.
机译：我们感谢汉娜博士对我们最近发表的论文发表的评论。2汉娜博士提出了以下问题：（a）溶解的二氧化硅（SiO_2）抑制系统中过氧化氢（H_2O_2）分解的机制； （b）在原位化学氧化（ISCO）系统中使用溶解的SiO_2稳定H_2O_2的可行性。在这里，我们按照他的评论中提出的顺序解决这些问题。溶解的SiO_2稳定H_2O_2的机理。 Hanna博士认为，在SiO_2存在下观察到的H_2O_2分解速度较慢是由于溶解的SiO_2与H_2O_2之间的相互作用。为了支持该主张，汉娜博士引用了参考文献15-18（数字对应于注释中的参考文献），其中涉及过渡金属分解H_2O_2。我们认为，在这些研究中观察到在存在溶解的SiO_2的情况下H_2O_2分解较慢的原因很可能是由于SiO_2降低了金属的催化活性。与汉娜博士所引用的SiO_2和H_2O_2之间的推测相互作用相比，这一经过充分研究的现象是一个更为合理的解释。

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  • 来源
    《Environmental Science & Technology》 |2012年第6期|p.3593-3594|共2页
  • 作者

    Anh Le-Tuan Pham; Fiona M. Doyle; David L. Sedlak;

  • 作者单位

    Department of Civil and Environmental Engineering, University of California at Berkeley, Berkeley, California 94720, United States;

    Department of Materials Science and Engineering, University of California at Berkeley, Berkeley, California 94720, United States;

    Department of Civil and Environmental Engineering, University of California at Berkeley, Berkeley, California 94720, 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);
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