• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Tenth International Conference on Modelling, Monitoring and Management of Air Pollution Jul, 2002 City of Segovia >Diffusive sampling of SO_2 and NO_2 concentrations in complex terrain in Castile and Leon (Spain)
【24h】

Diffusive sampling of SO_2 and NO_2 concentrations in complex terrain in Castile and Leon (Spain)

机译：西班牙卡斯蒂利亚和莱昂复杂地形中SO_2和NO_2浓度的扩散采样

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

92 radial diffusive samplers were used to measure sulphur dioxide and nitrogen dioxide concentrations in July 1999. They were distributed over a well-defined 56x56 km~2 grid centred around a coal power station, covering a large stretch of the provinces of Palencia and Leon in the north of Spain. Both pollutants were quantitatively retained on cartridges coated with triethanolamine, and exposed over a period of 20 days. The trapped sulphur dioxide and nitrogen dioxide were analysed as sulphite, sulphate and nitrite by ion chromatography. In order to determine the precision and the exposure time, preliminary tests were performed. The results showed the great sensitivity of the method applied and concluded that two or three weeks were a suitable time to measure all kinds of air pollution scenarios within the area. The accuracy of the diffusive samplers was evaluated by comparison with the measurements obtained using continuous analysers. The inter-comparison yielded satisfactory results (r=0.81, for SO_2 and NO_2) showing a tendency to underestimate the nitrogen dioxide concentration. Spatial distribution of both pollutants across the selected grid was analysed and compared. The concentration levels of sulphur dioxide and nitrogen dioxide ranged between 3.0-39.0 and 11.2-27.7 μg/m~3, respectively. In general, the results derived from the analysis of the concentration contours showed that the maximum concentrations of the pollutants were recorded in the prevailing wind sectors in the area and about 10 km downwind of the power station.
机译：1999年7月，使用了92个径向扩散采样器测量二氧化硫和二氧化氮的浓度。它们分布在以燃煤发电站为中心的清晰定义的56x56 km〜2网格上，覆盖了帕伦西亚和莱昂的大部分省份。西班牙北部。将两种污染物定量保留在涂有三乙醇胺的药筒上，并暴露20天。通过离子色谱法分析捕获的二氧化硫和二氧化氮为亚硫酸盐，硫酸盐和亚硝酸盐。为了确定精度和曝光时间，进行了初步测试。结果表明该方法具有很高的灵敏度，并得出结论，两到三周是测量该地区各种空气污染情景的合适时间。通过与使用连续分析仪获得的测量结果进行比较，评估了扩散采样器的准确性。相互比较得出令人满意的结果（对于SO_2和NO_2，r = 0.81）显示出低估二氧化氮浓度的趋势。分析并比较了选定网格上两种污染物的空间分布。二氧化硫和二氧化氮的浓度水平分别在3.0-39.0和11.2-27.7μg/ m〜3之间。通常，从浓度等值线分析得出的结果表明，污染物的最大浓度记录在该地区的主要风向和电站下风向约10 km处。

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