Speciated atmospheric mercury during haze and non-haze periods in winter at an urban site in Beijing, China: Pollution characteristics, sources, and causes analyses
文献类型：期刊论文
| 作者 | Wang, Chunjie; Wang, Zhangwei; Zhang, Xiaoshan |
| 刊名 | ATMOSPHERIC RESEARCH
 |
| 出版日期 | 2021-01-01 |
| 卷号 | 247页码:- |
| 关键词 | Gaseous elemental mercury Gaseous oxidized mercury Fine particulate bound mercury Potential sources regions Trace gases Circum-Bohai-Sea region |
| ISSN号 | 0169-8095 |
| 英文摘要 | Speciated atmospheric mercury (Hg) was measured at an urban site in Beijing, China from February to March 2018. The mean concentrations of gaseous elemental Hg (GEM), gaseous oxidized Hg (GOM), and fine particulate bound mercury (PBM2.5) were 2.81 +/- 0.90 ng m(-3), 10.7 +/- 8.5 pg m(-3), and 60.6 +/- 43.5 pg m(-3), respectively. Reactive Hg (i.e., RM = GOM+PBM2.5) only represented similar to 2.4% of total atmospheric Hg. The GEM concentration at the monitoring site was 1.7 times higher than the average value in the Northern Hemisphere. In particular, the mean GEM and PBM2.5 concentrations were significantly higher during haze period (hourly average AQI value > 100 for at least consecutive 24 h) (3.65 +/- 0.76 ng m(-3) and 93.0 +/- 37.1 pg m(-3)) than during non-haze period (2.42 +/- 0.73 ng m(-3) and 48.5 +/- 39.5 pg m(-3)). One possible explanation is the strong subsidence of air masses during haze period could lead to the accumulation of air pollutants. However, there was no significant difference in GOM concentration between haze and non-haze periods. Although the ozone, relative humidity (RH), and planetary boundary layer (PBL) all followed a clear diurnal cycle, while for RM no distinct diurnal pattern was observed. Additionally, GEM was significantly positively correlated with CO, indicating that they had homogeneous sources; whereas, they were all negatively correlated with wind speed and PBL height. Based on the combination of potential source contribution function and clustering analyses, we found that high atmospheric Hg events during haze days were more likely caused by the domestic sources in the Circum-Bohai-Sea region, while the transboundary transport of the clean air masses originating from Siberia was attributed to the low GEM and PBM2.5 levels during non-haze days. |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45573]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, 18 Shuangqing Rd, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Chunjie,Wang, Zhangwei,Zhang, Xiaoshan. Speciated atmospheric mercury during haze and non-haze periods in winter at an urban site in Beijing, China: Pollution characteristics, sources, and causes analyses[J]. ATMOSPHERIC RESEARCH,2021,247:-. |
| APA | Wang, Chunjie,Wang, Zhangwei,&Zhang, Xiaoshan.(2021).Speciated atmospheric mercury during haze and non-haze periods in winter at an urban site in Beijing, China: Pollution characteristics, sources, and causes analyses.ATMOSPHERIC RESEARCH,247,-. |
| MLA | Wang, Chunjie,et al."Speciated atmospheric mercury during haze and non-haze periods in winter at an urban site in Beijing, China: Pollution characteristics, sources, and causes analyses".ATMOSPHERIC RESEARCH 247(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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