• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Air quality, atmosphere & health >Temporal and spatial variability of particle-bound polycyclic aromatic hydrocabons in Bogota, Colombia
【24h】

Temporal and spatial variability of particle-bound polycyclic aromatic hydrocabons in Bogota, Colombia

机译：哥伦比亚波哥大颗粒结合的多环芳烃的时空变化

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

We have assessed diurnal profiles of particle-bound polycyclic aromatic hydrocarbons (pPAHs) in Bogota, Colombia using photoelectric aerosol sensors (PAS). PAS instruments were located close to a congested avenue to assess exposure to pedestrians, bike riders, drivers, and passengers. PAS signals during weekdays were significantly larger than during weekends, observing a similar pattern to traffic. During two different periods of analysis, it was found that meteorological conditions drive differences in PAS concentrations. An aethalometer was collocated with one PAS device to observe the relationship between PAS signals and black carbon (BC) concentration. We found a significant correlation between PAS signals and BC, suggesting that pPAHs and BC are products of the same source. Two PAS devices were located at different heights to assess vertical dispersion of pollutants. Our results suggest that pPAH loadings may diminish with height possibly due to a street canyon effect in the area. An assessment of exposure indicates that during rush hours, people are exposed to particulate matter enriched with pPAHs emitted from mobile sources. Measures should be implemented to reduce emission from vehicles on the road in order to protect public health.
机译：我们使用光电气溶胶传感器（PAS）评估了哥伦比亚波哥大的颗粒结合多环芳烃（pPAHs）的昼夜分布。 PAS仪器位于拥挤的道路附近，以评估对行人，骑自行车的人，驾驶员和乘客的暴露程度。在工作日，PAS信号明显大于周末，与流量类似。在两个不同的分析阶段，发现气象条件驱动PAS浓度的差异。将风速计与一台PAS设备并置，以观察PAS信号与黑碳（BC）浓度之间的关系。我们发现PAS信号和BC之间存在显着相关性，表明pPAH和BC是同一来源的产物。两个PAS设备位于不同的高度，以评估污染物的垂直扩散。我们的结果表明，可能由于该地区的街道峡谷效应，pPAH的装载量可能随高度减小。接触评估表明，在高峰时段，人们接触了从移动源排放的富含pPAH的颗粒物。应采取措施减少道路上车辆的排放，以保护公众健康。

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