...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Ionizing Radiation-Induced Destruction off Benzene and Dienes in Aqueous Media
【24h】

Ionizing Radiation-Induced Destruction off Benzene and Dienes in Aqueous Media

机译：电离辐射诱导水介质中苯和二烯的破坏

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

Pulse radiolysis with spectrophotometric and conductometric detection was utilized to study the formation and reactions of radicals from benzene and dienes in aqueous solutions.The benzene OH adduct,~(centre dot)C_6H_6OH,reacts with O_2 (k = 3 x 10~8 L mo~(-1)s~(-1))in a reversible reaction.The peroxyl radical,HOC_6H_6O_2~(centre dot),undergoes O_2~(centre dot-) elimination,bimolecular decay,and reaction with benzene to initiate a chain reaction,depending on the dose rate,benzene concentration,and pH.The occurrence of the chain reaction is demonstrated in low-dose-rate gamma radiolysis experiments where the consumption of O_2 was monitored.1,4-Cyclohexadiene,1,4-hexadiene,and 1,4-pentadiene form OH-adducts and undergo H-abstraction by O~(centre dot-)radicals.The OH-adducts react with O_2 to form peroxyl radicals.These peroxyl radicals,however,do not undergo unimolecular O_2~(centre dot-)elimination but rather decay by second-order processes,which lead to subsequent steps of O_2~(centre dot-)elimination.
机译：利用分光光度法和电导检测法进行脉冲辐射分解研究水溶液中苯和二烯自由基的形成和反应。苯OH加合物〜（中心点）C_6H_6OH与O_2反应（k = 3 x 10〜8 L mo 〜（-1）s〜（-1））可逆反应。过氧自由基HOC_6H_6O_2〜（中心点）经历O_2〜（中心点-）消除，双分子衰变并与苯反应以引发链反应取决于剂量率，苯浓度和pH。在低剂量率γ辐解实验中证明了链反应的发生，该实验监测了O_2的消耗。1,4-环己二烯，1,4-己二烯， 1,4-戊二烯与OH加成基并经O〜（中心点）自由基吸收H.OH加成基与O_2反应形成过氧自由基，但这些过氧自由基不会发生单分子O_2〜（消除中心点，但被二阶过程衰减，导致随后的O_2〜（中心点）消除。

著录项

  • 来源
    《Environmental Science & Technology》 |2006年第9期|p.3082-3088|共7页
  • 作者

    MOHAMAD AL-SHEIKHLY; DIANNE L.POSTER; JUNG-CHUL AN; PEDATSUR NETA; JOSEPH SILVERMAN;

  • 作者单位

    Department of Materials Science and Engineering,University of Maryland,College Park,Maryland 20742-2155,and Chemical Science and Technology Laboratory,National Institute of Standards and Technology,Gaithersburg,Maryland 20899;

    Department of Materials Science and Engineering,University of Maryland,College Park,Maryland 20742-2155,and Chemical Science and Technology Laboratory,National Institute of Standards and Technology,Gaithersburg,Maryland 20899;

    Department of Materials Science and Engineering,University of Maryland,College Park,Maryland 20742-2155,and Chemical Science and Technology Laboratory,National Institute of Standards and Technology,Gaithersburg,Maryland 20899;

    Department of Materials Science and Engineering,University of Maryland,College Park,Maryland 20742-2155,and Chemical Science and Technology Laboratory,National Institute of Standards and Technology,Gaithersburg,Maryland 20899;

    Department of Materials Science and Engineering,University of Maryland,College Park,Maryland 20742-2155,and Chemical Science and Technology Laboratory,National Institute of Standards and Technology,Gaithersburg,Maryland 20899;

  • 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 环境化学;
  • 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