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首页> 外文期刊>Atmospheric research >Polycyclic aromatic hydrocarbons in atmospheric PM_(2.5) and PM_(10) in the semi-arid city of Xi'an, Northwest China: Seasonal variations, sources, health risks, and relationships with meteorological factors
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Polycyclic aromatic hydrocarbons in atmospheric PM_(2.5) and PM_(10) in the semi-arid city of Xi'an, Northwest China: Seasonal variations, sources, health risks, and relationships with meteorological factors

机译：大气下PM_（2.5）和PM_（10）的多环芳烃在西安西安西安，中国西安市：季节性变化，来源，健康风险以及与气象因素的关系

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摘要

Atmospheric particulate matter (PM2.5 and PM10) samples were collected at urban and suburban sites in Xi'an City from December 2016 to November 2017. Sixteen priority polycyclic aromatic hydrocarbons (PAHs) associated with PM2.5 and PM10 were analyzed for their seasonal variations, sources, health risks, and influencing factors. The results showed that the annual average concentrations of PM2.5 and PM10 were 111 and 185 mu g/m(3), respectively, exceeding the National Ambient Air Quality Standard of China (35 mu g/m(3) for PM2.5 and 70 mu g/m(3) for PM10 in Grade II). The annual averages of PM2.5- and PM10-bound total PAHs were 63.1 and 66.8 ng/m(3), respectively, with a PM2.5 decrease in the order of winter (115 ng/m(3)) spring (47.6 ng/m(3)) summer (33.2 ng/m(3)) autumn (30.8 ng/m(3)) and a PM10 decrease in the order of winter (127 ng/m(3)) spring (55.6 ng/m(3)) autumn (32.6 ng/m(3)) summer (30.2 ng/m(3)). The most abundant PAHs were benzo[a]anthracene, benzo[b]fluoranthene, and fluoranthene. The PM2.5- and PM10-bound PAHs were originated mainly from traffic emissions (51.0% and 43.4%), followed by combustion of biomass (20.4% and 23.6%) and coal (16.8% and 23.1%). Pressure and relative humidity were positively correlated with PM2.5 and PM10 as well as PM2.5- and PM10-bound PAHs, while temperature, visibility and wind speed had negative correlations. The annual means of TEQs (toxic equivalency quantities) for the 16 PAHs in PM2.5 and PM10 were 10.1 and 10.2 ng/m(3), respectively, being attributed to 7 carcinogenic PAHs ( 95%). The ECRs (lifetime excess cancer risks) for PM2.5- and PM10-bound PAHs were 1.12 x 10(-3) and 1.17 x 10(-3), i.e., 1125 and 1169 lung cancer cases per million, respectively. The ILCRs (incremental lifetime cancer risks) due to PM2.5- and PM10-bound PAHs for adults (1.21 x 10(-6) and 1.26 x 10(-6)) were larger than those for children (2.09 x 10(-7) and 2.17 x 10(-7)), with acceptable carcinogenic risks. The ambient levels of PM and most PM-bound PAHs as well as their TEQs, ECRs and ILCRs exhibited a spatial pattern of the suburban site the urban site and a seasonality with winter and spring summer and autumn. The results suggest that it is important to control PM2.5 and PM10 for local air quality improvement and special attention should be paid to PM and PM-bound PAHs in suburban areas, particularly in winter and spring.
机译：从2016年12月到2017年11月，西安市城镇和郊区地点收集了大气颗粒物（PM2.5和PM10）样品。分析了与PM2.5和PM10相关的十六个优先的多环芳烃（PAH），以季节性变异，来源，健康风险和影响因素。结果表明，PM2.5和PM10的年平均浓度分别为111和185亩（3），超出了中国国家环境空气质量标准（35亩（3）为PM2.5和II级PM10的70 mu g / m（3））。 PM2.5-和PM10-结合的总PAHs的年平均值分别为63.1和66.8ng / m（3），PM2.5按冬季的顺序减少（115 ng / m（3））>弹簧（47.6 ng / m（3））>夏季（33.2 ng / m（3））>秋季（30.8 ng / m（3））和PM10按冬季的顺序减少（127 ng / m（3））> >弹簧（55.6 ng / m（3））>秋季（32.6 ng / m（3））>夏季（30.2 ng / m（3））。最丰富的PAHS是苯并[a]蒽，苯并[b]氟和氟。 PM2.5和PM10结合的PAHs主要来自交通排放（51.0％和43.4％），然后燃烧生物量（20.4％和23.6％）和煤（16.8％和23.1％）。压力和相对湿度与PM2.5和PM10以及PM2.5-和PM10-结合的多环芳烃呈正相关，而温度，可见性和风速有负相关。毒性当量的用于PM2.5和PM10的16种PAHs年度装置（毒性当量的量）分别为10.1和10.2毫微克/米（3），分别归因于7种致癌多环芳烃（> 95％）。 PM2.5和PM10-结合的PAHs的ECRS（终身癌症风险）分别为1.12×10（-3）和1.17×10（-3），即1125和1169百万％的肺癌病例。 ILCRS（增量寿命癌症风险）由于成人的PM2.5和PM10结合的PAHs（1.21×10（-6）和1.26×10（-6））大于儿童（2.09 x 10（ - 7）和2.17 x 10（-7）），具有可接受的致癌风险。 PM和大多数PM绑定的PAH和TEQS，ECRS和ILCR的环境水平表现出郊区网站的空间模式>城市网站和冬季和春季的季节性>夏季和秋季。结果表明，控制PM2.5和PM10对当地空气质量的提高，特别注意郊区的PM和PM-Labend Pahs，特别是在冬季和春季。

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  • 来源
    《Atmospheric research》 |2019年第11期|60-73|共14页
  • 作者

    Wang Lijun; Dong Shuzhen; Liu Mengmei; Tao Wendong; Xiao Bo; Zhang Shengwei; Zhang Panqing; Li Xiaoping;

  • 作者单位

    Shaanxi Normal Univ Dept Environm Sci & Engn Sch Geog & Tourism Xian 710119 Peoples R China|Int Joint Res Ctr Shaanxi Prov Pollutant Exposure Xian 710119 Peoples R China;

    Shaanxi Normal Univ Dept Environm Sci & Engn Sch Geog & Tourism Xian 710119 Peoples R China;

    Shaanxi Normal Univ Dept Environm Sci & Engn Sch Geog & Tourism Xian 710119 Peoples R China;

    SUNY Syracuse Coll Environm Sci & Forestry 1 Forestry Dr Syracuse NY 13210 USA;

    Xian Meteorol Adm Xian 710016 Peoples R China;

    Shaanxi Normal Univ Dept Environm Sci & Engn Sch Geog & Tourism Xian 710119 Peoples R China;

    Shaanxi Normal Univ Dept Environm Sci & Engn Sch Geog & Tourism Xian 710119 Peoples R China;

    Shaanxi Normal Univ Dept Environm Sci & Engn Sch Geog & Tourism Xian 710119 Peoples R China|Int Joint Res Ctr Shaanxi Prov Pollutant Exposure Xian 710119 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Polycyclic aromatic hydrocarbon; Particulate matter; Source; Health risk;

    机译：多环芳烃;颗粒物质;来源;健康风险;

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