...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Atmospheric environment >Characteristics and sources of air-borne particulate in Urumqi, China, the upstream area of Asia dust
【24h】

Characteristics and sources of air-borne particulate in Urumqi, China, the upstream area of Asia dust

机译：亚洲尘埃上游地区乌鲁木齐市空气传播颗粒物的特征和来源

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

A sampling campaign of aerosols over Urumqi from 2004 to 2007 with detailed and systematic analysis was carried out to investigate the severe air pollution in Urumqi, China, which is located nearby the upstream area of Asia dust. It was found that Urumqi city was the severest polluted city over the world. The average PM_(2.5) and TSP concentrations in the winter of 2007 were 187 and 385 μg m~(-3) with maximum of 487 and 1313μg m~(-3), respectively, 12 times higher than USA standard for PM_(2.5) and 3 times the National Ambient Air Quality Standard of China for TSP. The city's industrial emissions of sulfur dioxide were converted to sulfate in the air, and sulfate-rich soil dust was transported to Urumqi's air from agricultural fields south of Jungger Basin and surrounding salt lake areas. The mixing of the local anthropogenic aerosol with the transported soil dust from outside the city was the main sources of the high concentration of sulfate, one of the main factors causing the heavy air pollution over Urumqi. The high concentration of ammonium and sulfate salts in the aerosol from both inside and outside city and the low wind speed might be the main factors to form the heavy haze over the Urumqi.
机译：2004年至2007年在乌鲁木齐开展了一次气溶胶采样活动，并进行了详细而系统的分析，以调查位于亚洲粉尘上游地区附近的中国乌鲁木齐的严重空气污染。人们发现乌鲁木齐市是世界上污染最严重的城市。 2007年冬季的平均PM_（2.5）和TSP浓度分别为187和385μgm〜（-3），最大值分别为487和1313μgm〜（-3），是美国PM_（2.5）标准的12倍），是中国国家环境空气质量标准（TSP）的三倍。该市的工业二氧化硫排放物在空气中转化为硫酸盐，富含硫酸盐的土壤粉尘从荣格盆地以南和周围盐湖地区的农田运到乌鲁木齐的空气中。本地人为气溶胶与城市外运来的土壤粉尘的混合是高浓度硫酸盐的主要来源，这是造成乌鲁木齐市严重空气污染的主要因素之一。市区内外的气溶胶中铵盐和硫酸盐的浓度高，风速低可能是在乌鲁木齐形成浓雾的主要原因。

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