| 天津市区夏冬季环境空气PM2.5中碳组分污染特征及来源研究 |
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| 引用本文： | 程渊,刘保双,毕晓辉,吴建会,董海燕,李立伟,肖致美,张裕芬,冯银厂.天津市区夏冬季环境空气PM2.5中碳组分污染特征及来源研究[J].环境科学学报,2018,38(9):3394-3405. |
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| 作者姓名： | 程渊 刘保双 毕晓辉 吴建会 董海燕 李立伟 肖致美 张裕芬 冯银厂 |
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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;天津市环境监测中心 |
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| 基金项目： | 国家重点研发计划-大气污染多组分在线源解析集成技术（No.2016YFC0208500）；国家自然科学基金（No.21407081）；中央高校基本科研业务费 |
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| 摘 要： | 为了明确天津市区环境受体PM_(2.5)中碳组分的污染特征及来源,本研究分别于2016年2月(冬季)和8月(夏季)在天津市区设置6个采样点位同步采集PM_(2.5)样品,采用热光反射法测定样品中各个碳组分(OC1~OC4、EC1~EC3和OP(裂解碳))的含量,并计算得到OC、EC、CharEC和Soot-EC,以定性识别大气颗粒物中碳组分的来源.结果表明,夏季PM_(2.5)中OC平均浓度为(7.5±3.0)μg·m-3,占PM_(2.5)的11.7%±4.1%;而冬季相比于夏季OC的浓度和占比均有增加,分别为(13.1±7.0)μg·m-3和13.9%±2.8%.夏季和冬季EC浓度分别为(4.0±1.8)μg·m-3、(4.3±2.4)μg·m-3,占PM_(2.5)的6.1%±2.0%和4.6%±1.2%.OC与EC的相关性在夏季(r=0.83,p0.01)和冬季(r=0.96,p0.01)均显著,而冬季CharEC与OC(r=0.94,p0.01)、EC(r=0.98,p0.01)相关性明显高于夏季(OC:r=0.44,p0.01;EC:r=0.45,p0.01).PM_(2.5)中OC/EC平均值在夏季和冬季分别为1.9和3.0,估算得到夏季SOC为(2.6±1.4)μg·m-3,占OC的33.5%±13.6%;冬季为(3.5±2.5)μg·m-3,占OC的26.6%±12.0%.夏季Char-EC/Soot-EC为6.5,高于冬季(4.9),并且空间差异性显著(t检验,p0.05).正定矩阵因子模型(PMF)解析结果表明,天津市区大气PM_(2.5)中碳组分主要有4类来源:燃煤及生物质排放混合源、柴油车、汽油车、道路尘,对夏季PM_(2.5)中碳组分分担率分别为35.4%、16.4%、20.5%、14.4%;对冬季碳组分分担率分别为41.3%、15.5%、18.1%、16.3%.可见,燃煤和机动车是天津市区PM_(2.5)中碳组分的主要来源.
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| 关 键 词： | PM2.5 碳组分 来源解析 PMF 天津市区 |
| 收稿时间： | 2018/3/3 0:00:00 |
| 修稿时间： | 2018/5/7 0:00:00 |
Character and source analysis of carbonaceous aerosol in PM2.5 during summer-winter period, Tianjin urban area |
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| CHENG Yuan,LIU Baoshuang,BI Xiaohui,WU Jianhui,DONG Haiyan,LI Liwei,XIAO Zhimei,ZHANG Yufen and FENG Yinchang.Character and source analysis of carbonaceous aerosol in PM2.5 during summer-winter period, Tianjin urban area[J].Acta Scientiae Circumstantiae,2018,38(9):3394-3405. |
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| Authors: | CHENG Yuan LIU Baoshuang BI Xiaohui WU Jianhui DONG Haiyan LI Liwei XIAO Zhimei ZHANG Yufen and FENG Yinchang |
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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,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,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,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,Tianjin Environmental Monitoring Center Station, Tianjin 300191,Tianjin Environmental Monitoring Center Station, Tianjin 300191,Tianjin Environmental Monitoring Center Station, Tianjin 300191,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 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 |
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| Abstract: | |
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| Keywords: | PM2 5 carbonaceous fractions source apportionment PMF Tianjin urban area |
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