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武汉市冬季灰霾期PM2.5中水溶性无机离子的特征
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国家重点研发计划（2017YFC0212603，2016YFC0200905）；武汉市2013年重大科技攻关专项“武汉市大气灰霾成因与来源研究”


Characteristics of water-soluble inorganic ions in PM2.5 during a winter haze episode in Wuhan city
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    摘要:

    2018年1月，利用颗粒物采样器采集武汉市大气PM2.5样品并进行水溶性无机离子（F-、Cl-、NO3-、SO42-、Na+、NH4+、K+、Mg2+、Ca2+）的分析.结果表明，NO3-、SO42-、NH4+是PM2.5中最主要的3种水溶性无机离子，除Mg2+与Ca2+外，PM2.5与WSⅡs （水溶性无机离子）之间的相关性显著，且移动源贡献占主导地位.阴阳离子平衡表明武汉市冬季灰霾期PM2.5呈中性或弱酸性.通过混合单粒子拉格朗日综合轨迹模式模拟并采用分层聚类得出了4种主要的后向气流轨迹及相应的PM2.5和水溶性离子浓度，结果表明区域传输对此次灰霾期影响较大.

    Abstract:

    Atmospheric PM2.5 samples were collected by particulate matter samplers and the concentrations of water-soluble ions (F-,Cl-,NO3-,SO42-,Na+,NH4+,K+,Mg2+,and Ca2+) were analyzed in January 2018 in Wuhan city.The results show that NO3-,SO42-,and NH4+ are the major water-soluble inorganic ions in PM2.5.Moreover,the correlation between PM2.5 and water-soluble ions is significant,except for Mg2+ and Ca2+,and mobile sources play a dominant contributor role.The balance of anions and cations shows the PM2.5 is neutral or weakly acidic.Four major back air mass trajectories and corresponding concentrations of PM2.5 and water-soluble inorganic ions were obtained by a hybrid single-particle Lagrangian-integrated trajectory model and hierarchical clustering.The results indicate that regional transport had a considerable influence on this haze episode.

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蒋惠梦,肖寒,宋河,祝嘉欣,彭瑾,成海容,王祖武.武汉市冬季灰霾期PM2.5中水溶性无机离子的特征[J].南京信息工程大学学报(自然科学版),2018,10(5):590-598
JIANG Huimeng, XIAO Han, SONG He, ZHU Jiaxin, PENG Jin, CHENG Hairong, WANG Zuwu. Characteristics of water-soluble inorganic ions in PM2.5 during a winter haze episode in Wuhan city[J]. Journal of Nanjing University of Information Science & Technology, 2018,10(5):590-598

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  • 收稿日期:2018-08-05
  • 在线发布日期: 2018-11-02

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