...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Atmospheric research >Source apportionment of wet-deposited atmospheric mercury in Tampa, Florida
【24h】

Source apportionment of wet-deposited atmospheric mercury in Tampa, Florida

机译：佛罗里达坦帕市湿沉积大气汞的来源分配

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

In this paper, sources of mercury deposition to the Tampa area (Florida, USA) are investigated by analysis of one year (March 2000-March 2001) of daily wet deposition data. HYSPLIT back-trajectory modeling was performed to assess potential source locations for high versus low concentration events in data stratified by precipitation level. Positive matrix factorization (PMF) was also applied to apportion the elemental compositions from each event and to identify sources. Increased total mercury deposition was observed during summer months, corresponding to increased precipitation. However, mercury concentration in deposited samples was not strongly correlated with precipitation amount. Back-trajectories show air masses passing over Florida land in the short (12 h) and medium (24 h) term prior to deposition for high mercury concentration events. PMF results indicate that eleven factors contribute to the deposited elements in the event data. Diagnosed elemental profiles suggest the sources that contribute to mercury wet deposition at the study site are coal combustion (52% of the deposited mercury mass), municipal waste incineration (23%), medical waste incineration (19%), and crustal dust (6%). Overall, results suggest that sources local to the county and in Florida likely contributed substantially to mercury deposition at the study site, but distant sources may also contribute. (C) 2015 Elsevier B.V. All rights reserved.
机译：本文通过对一年（2000年3月至2001年3月）每日湿沉降数据的分析，调查了坦帕地区（美国佛罗里达）的汞沉积源。进行了HYSPLIT反向轨迹建模，以评估按降水量分层的数据中高浓度和低浓度事件的潜在源位置。正矩阵分解（PMF）也被用于分配每个事件的元素组成并确定来源。在夏季，观察到总汞沉积增加，这与降水增加相对应。但是，沉积样品中的汞浓度与降水量没有强烈关系。倒退轨迹显示，在高汞浓度事件沉积之前的短期（12小时）和中期（24小时）期间，空气质量流经佛罗里达土地。 PMF结果表明，有11个因素有助于事件数据中的沉积元素。诊断的元素概况表明，造成研究地点汞湿沉降的来源是煤炭燃烧（占汞沉积量的52％），城市垃圾焚化（23％），医疗垃圾焚化（19％）和地壳粉尘（6 ％）。总体而言，研究结果表明，该县和佛罗里达州的本地污染源可能对研究地点的汞沉积有很大贡献，但遥远的污染源也可能有贡献。 （C）2015 Elsevier B.V.保留所有权利。

著录项

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