| 典型物流城市2016年冬季2次污染过程PM2.5污染特征及来源解析 |
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| 引用本文： | 赵雪艳,杨文,王静,刘盈盈,白雯宇,徐艳萍,王歆华,白志鹏.典型物流城市2016年冬季2次污染过程PM2.5污染特征及来源解析[J].环境科学,2019,40(3):1052-1061. |
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| 作者姓名： | 赵雪艳 杨文 王静 刘盈盈 白雯宇 徐艳萍 王歆华 白志鹏 |
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| 作者单位： | 中国环境科学研究院,环境基准与风险评估国家重点实验室,北京 100012;临沂市环境监测站,临沂,276000 |
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| 基金项目： | 环境保护公益性行业科研专项（201309010，201409014）；国家科技支撑计划项目（2013BAK12B08） |
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| 摘 要： | 为研究典型物流城市临沂市冬季重污染天气过程中PM_(2.5)化学组分特征,探讨污染成因,于2016年12月～2017年1月在6个采样点连续采集28 d的PM_(2.5)样品,并对其离子、元素、碳组分进行分析.采样期间PM_(2.5)质量浓度均值(145. 2±87. 8)μg·m~(-3),日均值超标率为82%; 2次污染过程中PM_(2.5)均值浓度分别为(187. 3±79. 8)μg·m~(-3)和(205. 3±92. 0)μg·m~(-3),为《环境空气质量标准》(GB 3095-2012)年均二级标准的5. 4和5. 9倍.化学组分质量重构结果显示二次无机离子(SNA)是冬季PM_(2.5)的主要组分(所占质量分数为51. 2%),其次为有机物OM(23. 8%),再次为矿物尘MIN(12. 7%).结合污染过程中化学组分的变化趋势和累积速率发现,第1个污染过程中SNA和OM是引起PM_(2.5)浓度增加的原因之一,第2个污染过程中SNA是导致污染的主因,硫氧化率(SOR)、氮氧化率(NOR)和OC/EC比值的日均变化趋势进一步验证了该结论. PMF源解析结果表明,临沂市冬季大气PM_(2.5)的首要源类为二次颗粒物和生物质燃烧混合源(分担率50. 0%),其次为燃煤源(16. 8%)、机动车(12. 9%)和城市扬尘(10. 0%),再次为工业源(5. 3%)和土壤尘(5. 0%). 2次污染过程中二次颗粒物的贡献较之冬季平均有明显增加,说明不利气象条件下二次颗粒物的生成、累积是导致重污染期形成的主因.
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| 关 键 词： | 重污染 PM2.5 二次颗粒物 正矩阵因子分解法(PMF) 物流城市 |
| 收稿时间： | 2018/6/22 0:00:00 |
| 修稿时间： | 2018/9/6 0:00:00 |
Source Apportionment and Pollution Characteristics of PM2.5 During the Two Heavy Pollution Episodes in the Winter of 2016 in a Typical Logistics City |
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| ZHAO Xue-yan,YANG Wen,WANG Jing,LIU Ying-ying,BAI Wen-yu,XU Yan-ping,WANG Xin-hua and BAI Zhi-peng.Source Apportionment and Pollution Characteristics of PM2.5 During the Two Heavy Pollution Episodes in the Winter of 2016 in a Typical Logistics City[J].Chinese Journal of Environmental Science,2019,40(3):1052-1061. |
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| Authors: | ZHAO Xue-yan YANG Wen WANG Jing LIU Ying-ying BAI Wen-yu XU Yan-ping WANG Xin-hua and BAI Zhi-peng |
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| Institution: | State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,Linyi Environmental Monitoring Station, Linyi 276000, China,State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China and State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China |
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| Abstract: | |
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| Keywords: | heavy pollution episode PM2 5 secondary particulate matter positive matrix factorization (PMF) logistics city |
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