...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Temperature Dependence of the Reaction between the Hydroxyl Radical and Organic Matter
【24h】

Temperature Dependence of the Reaction between the Hydroxyl Radical and Organic Matter

机译：羟基自由基与有机物之间反应的温度依赖性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The temperature-dependent bimolecular rate constants for the reaction of the hydroxyl radical (HO*) with organic matter (OM) (fcoiu-HO-) nave ')*en measured for three natural organic matter (NOM) isolates and three bulk effluent organic matter (EfOM) samples using electron pulse radiolysis and thiocyanate competition kinetics. The range of values for the room temperature JfcoM-HO- was 1.21-9.37 x 10s Mc~ 's~', with NOM isolates generally reacting slower than EfOM samples. The NOM isolates had an average apparent activation energy of 19.8 kj mol~', while the EfOM samples had an average value slightly lower (14.3 k| mol"'), although one NOM isolate (Elliot Soil Humic Acid, 29.9 kj mop1) was a factor of 2 times greater than other samples studied. These apparent activation energies are the first determined for OM and HO*, and the Arrhenius plots obtained for NOM isolates (lowest R2 > 0.993) suggest that no significant structural changes are occurring over the temperature range 8—41 C. In contrast, the greater scatter (lowest R > 0.903) observed for the EfOM samples suggests that some structural changes may be occurring. These results provide a deeper fundamental understanding of the reaction between OM and HO* and will be useful in quantifying HO* reactions in natural and engineered systems.
机译：对于三种天然有机物（NOM）分离物和三种散装有机物，测量了羟基自由基（HO *）与有机物（OM）（fcoiu-HO-）中度'）* en反应的温度依赖性双分子速率常数物质（EfOM）样品使用电子脉冲辐射分解和硫氰酸盐竞争动力学。室温JfcoM-HO-的值范围为1.21-9.37 x 10s Mc〜's〜'，NOM分离株的反应通常比EfOM样品慢。 NOM分离物的平均表观活化能为19.8 kj mol〜'，而EfOM样品的平均值略低（14.3 k | mol''），尽管一个NOM分离物（艾略特土壤腐殖酸，29.9 kj mop1）这些表观活化能是首先确定的OM和HO *的2倍，NOM分离物的Arrhenius图（最低R2> 0.993）表明，在整个温度范围内都没有发生明显的结构变化相比之下，EfOM样品观察到的更大的散射（最低R> 0.903）表明可能发生某些结构变化，这些结果为OM和HO *之间的反应提供了更深入的基础知识，并且将是在定量自然和工程系统中的HO *反应时非常有用。

著录项

  • 来源
    《Environmental Science & Technology》 |2011年第16期|p.6932-6937|共6页
  • 作者

    Garrett McKay; Mei Mei Dong; Jonathan L. Kleinman; Stephen P. Mezyk; Fernando L. Rosario-Ortiz;

  • 作者单位

    Department of Chemistry and Biochemistry, California State University at Long Beach, 1250 Bellflower Blvd., Long Beach,California 90840, United States;

    Department of Civil, Environmental, and Architectural Engineering, 428 UCB, University of Colorado at Boulder, Boulder,Colorado 80309, United States;

    Department of Chemistry and Biochemistry, California State University at Long Beach, 1250 Bellflower Blvd., Long Beach,California 90840, United States;

    Department of Chemistry and Biochemistry, California State University at Long Beach, 1250 Bellflower Blvd., Long Beach,California 90840, United States;

    Department of Civil, Environmental, and Architectural Engineering, 428 UCB, University of Colorado at Boulder, Boulder,Colorado 80309, 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

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号