气候变化领域集成服务门户(CCPortal): Gas-particle partitioning of atmospheric reactive mercury and its contribution to particle bound mercury in a coastal city of the Yangtze River Delta, China

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DOI	10.1016/j.atmosenv.2020.117744
	Gas-particle partitioning of atmospheric reactive mercury and its contribution to particle bound mercury in a coastal city of the Yangtze River Delta, China
	Xu L.; Zhang Y.; Tong L.; Chen Y.; Zhao G.; Hong Y.; Xiao H.; Chen J.
发表日期	2020
ISSN	13522310
卷号	239
英文摘要	Speciated atmospheric mercury including reactive gaseous mercury (RGM), particle bound mercury (PBM), and gaseous elemental mercury (GEM) were measured for a two-year period in Ningbo city, the Yangtze River Delta, China. Averaged concentrations of PBM and RGM were 316 ± 377 pg m−3 and 100 ± 123 pg m−3, respectively, with the highest RGM/PBM ratio in summer (0.73 ± 1.31) and the lowest in winter (0.35 ± 0.56). The relationship between RGM/PBM ratio and PM2.5 was nonlinear. When PM2.5 fell in the range of 15–100 μg m−3, the PBM increased, the RGM decreased, and the RGM/PBM ratio showed an obvious decreasing trend as PM2.5 increased. An empirical linear relationship between log(1/Kp) and 1/T was obtained for different seasons. The correlation coefficient and slope of the equation were highest in winter, suggesting that T explained more for Kp variation and RM transferred quickly to the particle phase in the cold season. The relationships between Kp and aerosol compositions show that Kp increased with increasing fractions of Organics (Org), nitrate (NO3), and chloride (Chl) and decreasing fractions of sulfate (SO4) and ammonium (NH4) in aerosols. Principle component analysis - multiple linear regression (PCA-MLR) was used to evaluate the relative contributions of gas-particle partitioning of RM and sectional primary emissions to PBM in different seasons. The results show that the contributions of RM partitioning to PBM were 28.0% in spring, 28.3% in summer, 31.2% in autumn, and 39.2% in winter, which was well explained by the seasonal variations of temperature and aerosol compositions. © 2020 Elsevier Ltd
英文关键词	Aerosol compositions; Atmospheric reactive mercury; Gas-particle partitioning; PCA-MLR; Temperature
语种	英语
scopus关键词	Aerosols; Chlorine compounds; Gas emissions; Linear regression; Sulfur compounds; Correlation coefficient; Gas-particle partitioning; Gaseous elemental mercury; Multiple linear regressions; Particle bound mercury; Principle component analysis; Reactive gaseous mercury; Relative contribution; Mercury (metal); mercury; aerosol; ammonium; chloride; correlation; mercury (element); reaction kinetics; regression analysis; aerosol; air pollutant; air temperature; Article; autumn; China; city; cold; gas; meteorology; priority journal; river; seasonal variation; spring; summer; urban area; winter; China; Ningbo; Yangtze River; Zhejiang
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153008
作者单位	Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; University of Chinese Academy Sciences, Beijing, 100049, China
推荐引用方式 GB/T 7714	Xu L.,Zhang Y.,Tong L.,et al. Gas-particle partitioning of atmospheric reactive mercury and its contribution to particle bound mercury in a coastal city of the Yangtze River Delta, China[J],2020,239.
APA	Xu L..,Zhang Y..,Tong L..,Chen Y..,Zhao G..,...&Chen J..(2020).Gas-particle partitioning of atmospheric reactive mercury and its contribution to particle bound mercury in a coastal city of the Yangtze River Delta, China.Atmospheric Environment,239.
MLA	Xu L.,et al."Gas-particle partitioning of atmospheric reactive mercury and its contribution to particle bound mercury in a coastal city of the Yangtze River Delta, China".Atmospheric Environment 239(2020).