| 武汉市PM2.5化学组分时空分布及聚类分析 |
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| 引用本文： | 张会涛,田瑛泽,刘保双,杨佳美,郁佳,宫攀,吴建会,张裕芬.武汉市PM2.5化学组分时空分布及聚类分析[J].环境科学,2019,40(11):4764-4773. |
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| 作者姓名： | 张会涛 田瑛泽 刘保双 杨佳美 郁佳 宫攀 吴建会 张裕芬 |
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| 作者单位： | 南开大学环境科学与工程学院,国家环境保护城市空气颗粒物污染防治重点实验室,天津300350;武汉市环境监测中心,武汉,430015 |
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| 基金项目： | 中央高校基本科研业务费专项 |
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| 摘 要： | 颗粒物化学组分特征对于分析污染来源及成因具有较好的指示意义，能够为城市制定颗粒物源的有效管控提供基础数据支撑.本研究采集和分析了武汉市4个季节8个受体点位的PM2.5浓度及其化学组分数据.结合各点位组分特征及周边污染源分布情况，通过聚类分析讨论PM2.5化学组分的时空分布特征.结果表明，武汉市PM2.5年平均浓度为70.7μg·m-3，其中冬季PM2.5浓度（103.1μg·m-3）显著高于其它季节，秋季浓度最低（52.4μg·m-3）.从空间分布来看，东湖高新、沌口新区和青山钢花站点的PM2.5浓度显著高于其它站点.武汉市PM2.5主要的化学组分为OC和SO42-，占比分别为15.4%和14.2%.OC浓度表现为冬季最高，除了与不利的气象条件有关外，还可能受到周边区域传输的影响；而SO42-浓度夏季最高，具有较强的SO2二次转化.武汉市OC/EC年均比值为2.80，其中冬、春季小于夏、秋季；物质重构结果表明无机盐（SO42-、NO3-、NH4+）和有机物（OM）是PM2.5中的主要物质，占比分别为32.34%和20.44%；工业燃煤源及机动车源可能是武汉市环境受体中PM2.5主要贡献源.基于受体组分特征的聚类分析可见，武汉市8个站点可分为3类：其中汉阳月湖、灰霾超站、东湖梨园和黄陂区站为一类，主要特征是各站点组分浓度均较低；沌口新区与青山钢花为一类，NO3-和NH4+组分浓度较高；东湖高新与吴家山为一类，该两个站点不仅工业源污染较重，机动车及扬尘污染也有较大的贡献.
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| 关 键 词： | PM2.5 组分特征 时空分布 聚类分析 武汉 |
| 收稿时间： | 2019/4/8 0:00:00 |
| 修稿时间： | 2019/5/28 0:00:00 |
Spatial Temporal Characteristics and Cluster Analysis of Chemical Components for Ambient PM2.5 in Wuhan |
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| ZHANG Hui-tao,TIAN Ying-ze,LIU Bao-shuang,YANG Jia-mei,YU Ji,GONG Pan,WU Jian-hui and ZHANG Yu-fen.Spatial Temporal Characteristics and Cluster Analysis of Chemical Components for Ambient PM2.5 in Wuhan[J].Chinese Journal of Environmental Science,2019,40(11):4764-4773. |
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| Authors: | ZHANG Hui-tao TIAN Ying-ze LIU Bao-shuang YANG Jia-mei YU Ji GONG Pan WU Jian-hui and ZHANG Yu-fen |
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| Institution: | State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China,State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China,State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China,State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China,Wuhan Environmental Monitoring Center Station, Wuhan 430015, China,Wuhan Environmental Monitoring Center Station, Wuhan 430015, China,State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China and State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China |
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| Abstract: | |
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| Keywords: | PM2 5 chemical component spatial and temporal distribution cluster analysis Wuhan |
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