| 沈阳市采暖期与非采暖期空气PM2.5污染特征及来源分析 |
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| 引用本文： | 张显,田莎莎,刘盈盈,赵雪艳,余浩,张辉,陈莉,王歆华.沈阳市采暖期与非采暖期空气PM2.5污染特征及来源分析[J].环境科学,2019,40(3):1062-1070. |
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| 作者姓名： | 张显 田莎莎 刘盈盈 赵雪艳 余浩 张辉 陈莉 王歆华 |
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| 作者单位： | 天津师范大学地理与环境科学学院,天津,300387;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;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;北京师范大学水科学研究院,北京 100875 |
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| 摘 要： | 为了研究沈阳市采暖期与非采暖期空气PM_(2.5)污染特征及来源,于2015年1月29日～2016年1月26日在沈阳市采集PM_(2.5)有效样品113组,并分析了其载带的水溶性离子、碳组分及元素组分.结果表明,采样期间沈阳市PM_(2.5)质量浓度均值为66μg·m~(-3),其中31. 0%的样品超过《环境空气质量标准》(GB 3095-2012)日均值二级标准(75μg·m~(-3)),采暖期PM_(2.5)的平均浓度和超标率(90μg·m~(-3)、68. 6%)明显高于非采暖期(51μg·m~(-3)、31. 4%).采样期间21种元素(除了Mg、Ti、Ca、Fe、Si)、水溶性离子(除Ca~(2+)以外)和OC、EC质量浓度均呈现出采暖期高于非采暖期的趋势;NO_3~-]/SO_4~(2-)]比值表明非采暖期受移动源影响明显增加,燃煤等固定源仍是采暖期PM_(2.5)的主要来源,PM_(2.5)中水溶性离子是固定源和移动源共同作用的结果;氮氧化率(NOR)和硫氧化率(SOR)分析得到NO_x二次转化程度较弱,SO_2二次转化程度较强,特别是在非采暖期;富集因子结果表明EF值较高的元素主要来自燃煤、交通污染和工业排放. PM_(2.5)组分重构质量与实测质量呈现较好的相关性,采暖期和非采暖期PM_(2.5)中主要组分均为有机物(OM 28. 0%、23. 1%)、矿物尘(MIN 14. 5%、26. 0%)和SO_4~(2-)(15. 1%、19. 9%),PM_(2.5)受二次粒子、燃烧源和扬尘源影响较大.
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| 关 键 词： | 沈阳市 采暖期 非采暖期 PM2.5 污染特征 质量重构 |
| 收稿时间： | 2018/7/20 0:00:00 |
| 修稿时间： | 2018/9/14 0:00:00 |
Pollution Characteristics and Source Apportionment of PM2.5 in Heating and Non-heating Periods in Shenyang |
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| ZHANG Xian,TIAN Sha-sh,LIU Ying-ying,ZHAO Xue-yan,YU Hao,ZHANG Hui,CHEN Li and WANG Xin-hua.Pollution Characteristics and Source Apportionment of PM2.5 in Heating and Non-heating Periods in Shenyang[J].Chinese Journal of Environmental Science,2019,40(3):1062-1070. |
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| Authors: | ZHANG Xian TIAN Sha-sh LIU Ying-ying ZHAO Xue-yan YU Hao ZHANG Hui CHEN Li and WANG Xin-hua |
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| Institution: | School of Geographic and Environmental Sciences, Tianjin Normal University, Tianjin 300387, China,School of Geographic and Environmental Sciences, Tianjin Normal University, Tianjin 300387, 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;College of Water Sciences, Beijing Normal University, Beijing 100875, China,School of Geographic and Environmental Sciences, Tianjin Normal University, Tianjin 300387, China,School of Geographic and Environmental Sciences, Tianjin Normal University, Tianjin 300387, 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: | Shenyang heating period non-heating period PM2 5 pollution characteristics mass closure |
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