| 上海市PM2.5中重金属元素对COVID-19控制的高频响应 |
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| 引用本文： | 程凯,常运华,旷雅琼,邹忠.上海市PM2.5中重金属元素对COVID-19控制的高频响应[J].环境科学,2021,42(8):3644-3651. |
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| 作者姓名： | 程凯 常运华 旷雅琼 邹忠 |
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| 作者单位： | 南京信息工程大学应用气象学院, 耶鲁大学-南京信息工程大学大气环境中心, 南京 210044;复旦大学环境科学与工程系, 上海市大气颗粒物污染防治重点实验室, 上海 200433 |
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| 基金项目： | 国家自然科学基金项目（41975166,41705100）;环境模拟与污染控制国家重点联合实验室专项（19K01ESPCT）;上海市大气颗粒物污染防治重点实验室开放课题项目（FDLAP19001） |
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| 摘 要： | 为研究城市大气重金属元素在新冠控制前、中（与春节重叠）、后的演化和来源,利用多金属在线分析仪于2020年1月1日至2月26日测定了上海市PM2.5中重金属元素的小时浓度.利用PMF模型确定了8个来源.结果表明,大部分元素的浓度呈现"V"字型的变化趋势,主要受烟花爆竹（特征性元素有K、Cu、Ba）、Se工业、道路扬尘（Ca、Fe、Ba）和机动车（Mn、Zn、Fe、Cu）等排放源影响.但在新冠控制期间,K、Ba和Cu浓度仍较高.以Cu元素为例的特殊事件分析表明,其浓度高值在控制期前显著受到外来传输的影响,在控制期内主要来自于本地烟花爆竹排放的影响.
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| 关 键 词： | 重金属元素 新冠控制 高频响应 来源 PMF模型 |
| 收稿时间： | 2020/12/6 0:00:00 |
| 修稿时间： | 2021/1/19 0:00:00 |
High-frequency Responses to the COVID-19 Shutdown of Heavy Metal Elements in PM2.5 in Shanghai |
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| CHENG Kai,CHANG Yun-hu,KUANG Ya-qiong,ZOU Zhong.High-frequency Responses to the COVID-19 Shutdown of Heavy Metal Elements in PM2.5 in Shanghai[J].Chinese Journal of Environmental Science,2021,42(8):3644-3651. |
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| Authors: | CHENG Kai CHANG Yun-hu KUANG Ya-qiong ZOU Zhong |
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| Institution: | Yale-NUIST Center on Atmospheric Environment, International Joint Laboratory on Climate and Environment Change (ILCEC), School of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China; Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China |
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| Abstract: | To study the evolution and sources of heavy metal elements in the urban atmosphere before, during (overlapped with Chinese Lunar New Year), and after China''s COVID-19 shutdown, a multi-metal online analyzer was deployed to determine the trace elements in PM2.5 in Shanghai from January 1 to February 26, 2020. Meanwhile, source apportionment of the hourly measured heavy metal concentrations was performed using a PMF model, in which eight sources were identified. The results show that the concentrations of most elements presented a "V-shaped" trend, which was mainly influenced by emissions from fireworks (K, Cu, Ba as indicative elements), Se-related industry, road dust (Ca, Fe, Ba), and motor vehicles (Mn, Zn, Fe, Cu). However, during the COVID-19 shutdown period, the concentrations of K, Ba, and Cu were high. Case-specific analysis suggested that prior to the shutdown period, the high concentrations of Cu were significantly influenced by long-range transport, which shifted to a dominant contribution from local fireworks during the shutdown period. |
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| Keywords: | heavy metal elements COVID-19 shutdown high-frequency response source PMF model |
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