...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Evidence of Aerosols as a Media for Rapid Daytime HONO Production over China
【24h】

Evidence of Aerosols as a Media for Rapid Daytime HONO Production over China

机译：气溶胶作为中国白天白昼快速生产的媒介的证据

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

Current knowledge of daytime HONO sources remains incomplete. A large missing daytime HONO source has been found in many places around the world, including polluted regions in China. Conventional understanding and recent studies attributed this missing source mainly to ground surface processes or gas-phase chemistry, while assuming aerosols to be an insignificant media for HONO production. We analyze in situ observations of HONO and its precursors at an urban site in Beijing, China, and report an apparent dependence of the missing HONO source strength on aerosol surface area and solar ultraviolet radiation. Based on extensive correlation analysis and process-modeling, we propose that the rapid daytime HONO production in Beijing can be explained by enhanced hydrolytic disproportionation of NO_2 on aqueous aerosol surfaces due to catalysis by dicarboxylic acid anions. The combination of high abundance of NO_2, aromatic hydrocarbons, and aerosols over broad regions in China likely leads to elevated HONO levels, rapid OH production, and enhanced oxidizing capacity on a regional basis. Our findings call for attention to aerosols as a media for daytime heterogeneous HONO production in polluted regions like Beijing. This study also highlights die complex and uncertain heterogeneous chemistry in China, which merits future efforts of reconciling regional modeling and laboratory experiments, in order to understand and mitigate the regional particulate and O_3 pollutions over China.
机译：当前关于白天HONO来源的知识仍然不完整。在世界许多地方，包括中国的污染地区，都发现了白天缺少的大量HONO来源。常规理解和最新研究将这种缺失的来源主要归因于地面过程或气相化学，同时假设气溶胶对于HONO生产而言是微不足道的介质。我们在中国北京的城市现场分析了HONO及其前体的原位观测，并报告了缺少的HONO源强度对气溶胶表面积和太阳紫外线辐射的明显依赖性。基于广泛的相关性分析和过程建模，我们认为，北京白天白天快速生成HONO的现象可以通过二羧酸阴离子催化在水气溶胶表面上NO_2的水解歧化作用来解释。在中国广大地区，NO_2，芳烃和气溶胶含量高的组合可能导致HONO含量升高，OH生成迅速，并在区域范围内增强氧化能力。我们的发现呼吁人们关注像北京这样的污染地区的气溶胶作为白天异质HONO生产的媒介。这项研究还着重介绍了中国复杂而不确定的异质化学，这有待于未来进行区域模型和实验室实验的协调，以了解和减轻中国区域性颗粒物和O_3污染。

著录项

  • 来源
    《Environmental Science & Technology》 |2014年第24期|14386-14391|共6页
  • 作者

    Zhen Liu; Yuhang Wang; Francesca Costabile; Antonio Amoroso; Chun Zhao; L. Greg Huey; Robert Stickel; Jin Liao; Tong Zhu;

  • 作者单位

    School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332, United States,Sandia National Laboratories, Livermore, California, United States;

    School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332, United States;

    Institute for Atmospheric Pollution, National Research Council (CNR-IIA), Rome 7-00185, Italy,ISAC-CNR, Rome, Italy;

    Institute for Atmospheric Pollution, National Research Council (CNR-IIA), Rome 7-00185, Italy;

    Pacific Northwest National Laboratory, Richland, Washington 99354, United States;

    School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332, United States;

    School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332, United States;

    School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332, United States;

    College of Environmental Sciences and Engineering, Peking University, Beijing, China;

  • 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