| 南京江北新区冬季PM2.5中化学组分的昼夜变化特征及其来源解析 |
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| 引用本文： | 邱晨晨,于兴娜,丁铖,时政,张瑞芳,侯思宇,侯新红.南京江北新区冬季PM2.5中化学组分的昼夜变化特征及其来源解析[J].环境科学,2020,41(2):529-536. |
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| 作者姓名： | 邱晨晨 于兴娜 丁铖 时政 张瑞芳 侯思宇 侯新红 |
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| 作者单位： | 南京信息工程大学气象灾害预报预警与评估协同创新中心,中国气象局气溶胶与云降水重点开放实验室,南京 210044,南京信息工程大学气象灾害预报预警与评估协同创新中心,中国气象局气溶胶与云降水重点开放实验室,南京 210044,南京信息工程大学气象灾害预报预警与评估协同创新中心,中国气象局气溶胶与云降水重点开放实验室,南京 210044,南京信息工程大学气象灾害预报预警与评估协同创新中心,中国气象局气溶胶与云降水重点开放实验室,南京 210044,南京信息工程大学气象灾害预报预警与评估协同创新中心,中国气象局气溶胶与云降水重点开放实验室,南京 210044,南京信息工程大学气象灾害预报预警与评估协同创新中心,中国气象局气溶胶与云降水重点开放实验室,南京 210044,南京信息工程大学气象灾害预报预警与评估协同创新中心,中国气象局气溶胶与云降水重点开放实验室,南京 210044 |
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| 基金项目： | 国家重点研发计划项目（2016YFC0203501）;国家自然科学基金项目（41775154）;江苏省"六大人才高峰"项目（JNHB-057） |
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| 摘 要： | 为更好地了解南京江北新区大气气溶胶中水溶性离子的昼夜变化特征,冬季连续采集了2个月的PM_(2.5)样品,研究其水溶性离子昼夜变化特征及来源解析.结果表明,观测期间水溶性离子质量浓度变化范围为17. 07～168. 43μg·m~(-3),均值为(59. 01±30. 75)μg·m~(-3),且白天的水溶性离子平均质量浓度高于夜晚. NO_3~-和NH_4~+的浓度占离子总浓度的比值在夜晚偏高,而SO_4~(2-)和Cl~-则在白天偏高. SO_4~(2-)、NO_3~-和NH_4~+(SNA)是南京市PM_(2.5)中最重要的水溶性离子,其质量浓度在污染天要高于清洁天.白天和夜晚的阴阳离子平衡比值(AE/CE)大于1,说明PM_(2.5)呈酸性.相关性分析显示NH_4~+与NO_3~-、SO_4~(2-)之间具有显著的线性相关性,其在PM_(2.5)中主要是以NH_4NO_3和(NH_4)_2SO_4结合方式存在. PMF源解析进一步表明南京江北新区冬季大气PM_(2.5)中水溶性离子主要来源于机动车排放、化石燃料燃烧、生物质燃烧和扬尘等.
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| 关 键 词： | 南京 PM2.5 水溶性离子 昼夜特征 来源解析 |
| 收稿时间： | 2019/8/7 0:00:00 |
| 修稿时间： | 2019/9/29 0:00:00 |
Diurnal Variations and Source Apportionment of Water-soluble Ions in PM2.5During Winter in Nanjing Jiangbei New Area |
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| QIU Chen-chen,YU Xing-n,DING Cheng,SHI Zheng,ZHANG Rui-fang,HOU Si-yu and HOU Xin-hong.Diurnal Variations and Source Apportionment of Water-soluble Ions in PM2.5During Winter in Nanjing Jiangbei New Area[J].Chinese Journal of Environmental Science,2020,41(2):529-536. |
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| Authors: | QIU Chen-chen YU Xing-n DING Cheng SHI Zheng ZHANG Rui-fang HOU Si-yu and HOU Xin-hong |
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| Institution: | Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster, Nanjing University of Information Science and Technology, Nanjing 210044, China,Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster, Nanjing University of Information Science and Technology, Nanjing 210044, China,Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster, Nanjing University of Information Science and Technology, Nanjing 210044, China,Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster, Nanjing University of Information Science and Technology, Nanjing 210044, China,Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster, Nanjing University of Information Science and Technology, Nanjing 210044, China,Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster, Nanjing University of Information Science and Technology, Nanjing 210044, China and Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster, Nanjing University of Information Science and Technology, Nanjing 210044, China |
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| Abstract: | |
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| Keywords: | Nanjing PM2 5 water-soluble ions day-night characteristics source analysis |
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