北京市PM_(2.5)组分SO_4^(2-)浓度的时空分布及来源分析  

TEMPORAL,SPATIAL DISTRIBUTION AND SOURCE SIMULATION ANALYSIS OF SO_4^(2-) IN PM_(2.5) IN BEIJING

作　　者：于博[1] 程念亮[2,3] 李红霞[4] 陈云波[3] 张玮琦[3] 张玉洁[3] 党鸿雁[3] 杨欣[3] 

机构地区：[1]东北石油大学化学化工学院,黑龙江大庆163318 [2]北京师范大学水科学研究院,北京100875 [3]中国环境科学研究院,北京100012 [4]中山大学先进技术研究院,广州510275

出　　处：《环境工程》2016年第7期102-109,共8页Environmental Engineering

基　　金：国家科技支撑计划(2014BAC23B02;2014BAC06B05);环保公益行业专项(201409005;201309071);国家自然科学基金资助项目(41401222)

摘　　要：采用观测与数值模拟相结合的方法并查阅大量文献,系统分析了北京市SO_4^(2-)时空分布、转化及来源特征,结果表明:近年来北京市SO_4^(2-)年均浓度在8.85~25.13μg/m3;2013年北京市SO_4^(2-)浓度整体呈现出重污染日>冬季>春、秋季>夏季的特征,日变化上SO_4^(2-)浓度呈现双峰型分布,空间分布上SO_4^(2-)浓度呈南北梯度分布特征;2013年北京市SOR年均值在0.36~0.44,重污染日SOR平均值在0.40~0.46;2013年北京市年均SO_4^(2-)本地、外来源、背景及边界条件分别贡献34%、57%、9%;重污染日SO_4^(2-)本地、外来源、背景及边界条件分别贡献18%、77%、5%;外来源对北京市SO_4^(2-)浓度起着更为重要的作用。The spatial,temporal distribution,transformation and source simulation of SO_4^（2-）were analyzed systematically based on the monitoring data,literature review and numerical simulation（ CAMx）. Analysis results showed that the city＇ s annual average concentration of SO_4^（2-）in Beijing was between 8. 85 ~ 25. 13 μg / m3 with an increasing trend in recent years; from the highest to the lowest,concentration of SO_4^（2-）at different time were： Heavy air pollution days winter autumn and spring summer; and diurnal variation of SO_4^（2-）showed bimodal distribution and spatial distribution of SO_4^（2-）showed significant northsouth gradient distribution; the city＇s annual average SOR was between 0. 36 and 0. 44 while it was between 0. 40 and 0. 46 during heavy air pollution days in 2013; simulated local,external transportation and icon,bcon was 34%,57%,9%respectively to the annual average concentration of SO_4^（2-）in Beijing in 2013 while it was 18%,77%,5% respectively in heavy air pollution days which indicated that external sources played an important role to the concentration of SO_4^（2-）in Beijing.

关 键 词：SO2-4 时空分布 北京 CAMX PM2.5 

分 类 号：X513[环境科学与工程—环境工程]