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首页> 外文期刊>Journal of Atmospheric Chemistry >The chemistry of heavy haze over Urumqi, Central Asia
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The chemistry of heavy haze over Urumqi, Central Asia

机译：中亚乌鲁木齐的浓雾化学

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摘要

A sampling campaign of aerosols over Urumqi from 2001-2007 and soil samples in the surrounding areas were carried out to investigate the severe air pollution in Urumqi, a typical inland city, located in the center of Asia. Urumqi is one of the heavy polluted cities in the world, as the days of haze spanned over one third of the year and accounted for 60-80% of the heating period for the past 6 years. High concentration of fine aerosols, frequent occurrence, and rapid formation of heavy haze were the three main characteristics. With comparison of the pollution elements, As, Cd, and S, and the ratio of Ca/Al in aerosols and soils in those sites located on the south of Jungger Basin as tracers, it was found that As, Cd, and S highly enriched in the aerosols over urban Urumqi were not only from the re-suspended road dust but also from the soil transported from south of the Jungger Basin. Different from the most cities in China, the high concentration of sulfate in Urumqi was partially from the primary soil dust transported from the surrounding areas. The mixing of the local anthropogenic aerosols with the soil transported from outside the city was the main source of the high sulfate concentration. Ammonium salts were higher than the summed equivalents of SO_4~(2-), NO_3~-, and Cl~- in Urumqi and much higher than that in other Chinese cities. The total water soluble ions and the total ammonium salts were as high as 57.8% and 51.0% in PM_(2.5). The high concentration of soluble salts with high hygroscopicity, especially ammonium and sulfate salts, were the main factors contributing to the heavy haze over Urumqi.
机译：在2001年至2007年期间，对乌鲁木齐进行了一次气溶胶采样活动，并在周边地区进行了土壤采样，以调查位于亚洲中部的典型内陆城市乌鲁木齐的严重空气污染。乌鲁木齐是世界上污染最严重的城市之一，因为阴霾天超过一年的三分之一，占过去6年供暖期的60-80％。高浓度的细小气溶胶，频繁发生和快速形成浓雾是这三个主要特征。通过比较位于容格盆地南部的那些示踪物上的污染元素As，Cd和S以及气溶胶和土壤中Ca / Al的比率，发现As，Cd和S高度富集乌鲁木齐市区上空的气溶胶中的污染物不仅来自重新悬浮的道路灰尘，还来自荣格盆地南部的土壤运移。与中国大多数城市不同，乌鲁木齐市硫酸盐的高浓度部分来自周围地区的主要土壤尘埃。高硫酸盐浓度的主要来源是当地人为气溶胶与从城市外运来的土壤的混合。铵盐比乌鲁木齐的SO_4〜（2-），NO_3〜-和Cl〜-的总当量要高，远高于中国其他城市。在PM_（2.5）中，水溶性离子和铵盐的总含量分别高达57.8％和51.0％。高浓度，高吸湿性的可溶性盐，尤其是铵盐和硫酸盐，是造成乌鲁木齐雾霾严重的主要因素。

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  • 来源
    《Journal of Atmospheric Chemistry》 |2008年第1期|57-72|共16页
  • 作者

    Juan Li; Guoshun Zhuang; Kan Huang; Yanfen Lin; Qiongzhen Wang; Yuhong Guo; Jinghua Guo; Shulong Yu; Caixia Cui; Joshua S. Fu;

  • 作者单位

    Center for Atmospheric Chemistry Study, Department of Environmental Science and Engineering Fudan University, Shanghai 200433, People's Republic of China Institute of Desert and Meteorology, CMA, Urumqi, Xinjiang 830002, People's Republic of China;

    Center for Atmospheric Chemistry Study, Department of Environmental Science and Engineering Fudan University, Shanghai 200433, People's Republic of China;

    Center for Atmospheric Chemistry Study, Department of Environmental Science and Engineering Fudan University, Shanghai 200433, People's Republic of China;

    Center for Atmospheric Chemistry Study, Department of Environmental Science and Engineering Fudan University, Shanghai 200433, People's Republic of China;

    Center for Atmospheric Chemistry Study, Department of Environmental Science and Engineering Fudan University, Shanghai 200433, People's Republic of China;

    General Environmental Monitoring Station, Urumqi, Xinjiang 830011, People's Republic of China;

    Analysis and Testing Center, Beijing Normal University, Beijing 100875, China;

    Institute of Desert and Meteorology, CMA, Urumqi, Xinjiang 830002, People's Republic of China;

    Institute of Desert and Meteorology, CMA, Urumqi, Xinjiang 830002, People's Republic of China;

    Department of Civil and Environmental Engineering, The University of Tennessee, Knoxville, TN 37996, USA;

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  • 正文语种 eng
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  • 关键词

    haze; source; ammonium; sulfate; mixing; formation mechanism;

    机译：阴霾;资源;铵硫酸盐混合;形成机理;

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