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Copyright of Journal of Jilin University (Medicine Edition) is the property of Jilin University Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Oil Drilling & Production Technology / Shiyou Zuancai Gongyi is the property of Shiyou Zuancai Gongyi Bianjibu and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

利用在线监测仪测量了杭州市一次重灰霾过程（2017年12月29日至2018年1月3日） 中PM2.5主要水溶性离子（Cl- 、SO42- 、NO3- 、NH4+ 、Na+ 、Ga2+ 、Mg2+） 及主要气态污染物（SO2、NO2、O3、NO、CO、 HCl、NH3、HNO2、HNO3） 的小时浓度。结合混合受体模型和国控监测分析，研究了2017 年12 月30-31 日重灰霾事件的污染特征、来源和成因。研究结果表明：PM2.5 浓度高达318 μg·m-3； NO3-/SO42-最大值为2.68，说明移动源污染是杭州市PM2.5形成的重要来源； PM2.5/CO 最高达到0.19，说明二次细颗粒物对PM2.5贡献很大； NO3-、SO42-、NH4+的浓度总和占PM2.5 平均浓度的64.3%，说明二次无机细颗粒物是杭州重灰霾形成的重要原因，且NO3-的贡献最大，占33.5%。混合受体模型分析显示，杭州市重灰霾污染的潜在源区主要位于安徽、江苏、河南、山东四省交界处，以及安徽省中东部、蚌埠、芜湖等工业污染较为严重的城市。夹杂着大量污染物的北方干冷空气远距离传输叠加部分局地源是杭州此次重雾霾形成的根本原因。因此，为了改善杭州市空气质量，不仅需控制当地的污染物排放，而且还需对整个长三角地区甚至跨区域采取大气联防联控策略。

Copyright of Journal of Jilin University (Medicine Edition) is the property of Jilin University Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Rubber Industry is the property of Editorial Office of China Rubber Industry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Rubber Industry is the property of Editorial Office of China Rubber Industry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Oil Drilling & Production Technology / Shiyou Zuancai Gongyi is the property of Shiyou Zuancai Gongyi Bianjibu and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Oil Drilling & Production Technology / Shiyou Zuancai Gongyi is the property of Shiyou Zuancai Gongyi Bianjibu and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Oil Drilling & Production Technology / Shiyou Zuancai Gongyi is the property of Shiyou Zuancai Gongyi Bianjibu and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)