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DOI	10.5194/acp-22-2191-2022
	Sources and processes of iron aerosols in a megacity in Eastern China
	Zhu, Yanhong; Li, Weijun; Wang, Yue; Zhang, Jian; Liu, Lei; Xu, Liang; Xu, Jingsha; Shi, Jinhui; Shao, Longyi; Fu, Pingqing; Zhang, Daizhou; Shi, Zongbo
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	2191
结束页码	2202
卷号	22 期号:4 页码:12
英文摘要	Iron (Fe) in aerosol particles is a major external source of micronutrients for marine ecosystems and poses a potential threat to human health. To understand the impacts of aerosol Fe, it is essential to quantify the sources of dissolved Fe and total Fe. In this study, we applied receptor modeling for the first time to apportion the sources of dissolved Fe and total Fe in fine particles collected under five different weather conditions in the Hangzhou megacity of Eastern China, which is upwind of the East Asian outflow. Results showed that Fe solubility (dissolved Fe to total Fe) was the largest on fog days (6.7 +/- 3.0 %), followed by haze (4.8 +/- 1.9 %), dust (2.1 +/- 0.7 %), clear (1.9 +/- 1.0 %), and rain (0.9 +/- 0.5 %) days. Positive matrix factorization (PMF) analysis suggested that industrial emissions were the largest contributor to dissolved Fe (44.5 %-72.4 %) and total Fe (39.1 %-55.0 %, except for dust days) during haze, fog, dust, and clear days. Transmission electron microscopy analysis of individual particles showed that > 75 % of Fe-containing particles were internally mixed with acidic secondary aerosol species on haze, fog, dust, and clear days. Furthermore, Fe solubility showed significant positive correlations with aerosol acidity/total Fe and liquid water content. These results indicated that the wet surface of aerosol particles promotes heterogeneous reactions between acidic species and Fe aerosols, contributing to a high Fe solubility.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000760379900001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273438
作者单位	Zhejiang University; University of Warwick; Ministry of Education, China; Ocean University of China; China University of Mining & Technology; Tianjin University; University of Birmingham
推荐引用方式 GB/T 7714	Zhu, Yanhong,Li, Weijun,Wang, Yue,et al. Sources and processes of iron aerosols in a megacity in Eastern China[J],2022,22(4):12.
APA	Zhu, Yanhong.,Li, Weijun.,Wang, Yue.,Zhang, Jian.,Liu, Lei.,...&Shi, Zongbo.(2022).Sources and processes of iron aerosols in a megacity in Eastern China.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(4),12.
MLA	Zhu, Yanhong,et al."Sources and processes of iron aerosols in a megacity in Eastern China".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.4(2022):12.