Influence of sources and atmospheric processes on metal solubility in PM2.5 in urban Guangzhou, South China

被引:0
|
作者
Zhang, Zhisheng [1 ]
Tao, Jun [2 ]
Zhang, Leiming [3 ]
Hu, Bangkai [2 ]
Liu, Ming [1 ]
Nie, Fuli [1 ]
Lu, Haitao [1 ]
Chen, Laiguo [1 ]
Wu, Yunfei [4 ]
Chen, Duohong [5 ]
Wang, Boguang [2 ]
Che, Huizheng [6 ,7 ]
机构
[1] Minist Ecol & Environm, South China Inst Environm Sci, Guangzhou, Peoples R China
[2] Jinan Univ, Inst Environm & Climate Res, Coll Environm & Climate, Guangzhou, Peoples R China
[3] Air Qual Res Div, Sci & Technol Branch, Environm & Climate Change Canada, Toronto, ON, Canada
[4] Chinese Acad Sci, Inst Atmospher Phys, Key Lab Middle Atmosphere & Global Environm Observ, Beijing, Peoples R China
[5] Minist Ecol & Environm, Guangdong Ecol & Environm Monitoring Ctr, Environm Key Lab Reg Air Qual Monitoring, Guangzhou, Peoples R China
[6] Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing, Peoples R China
[7] Chinese Acad Meteorol Sci, Key Lab Atmospher Chem CMA, Beijing, Peoples R China
关键词
Aerosol acidity; Crustal sources; Non-exhaust emissions; Organic acid complexation; Transition metal; AEROSOL IRON SOLUBILITY; RIVER DELTA REGION; PARTICULATE MATTER; TRACE-ELEMENTS; FLY-ASH; SOURCE APPORTIONMENT; TEMPORAL VARIABILITY; DITHIOTHREITOL DTT; COAL COMBUSTION; SOLUBLE IRON;
D O I
10.1016/j.scitotenv.2024.175807
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Water-soluble metals exert a significant influence on human and ecosystem health. In this study, a comprehensive investigation was undertaken to elucidate the solubilities of metals in PM2.5 and potential influencing factors during the dry season of 2019-2020 in urban Guangzhou, South China. The observed average solubility was <20 % for Al, Fe, Sn, and Ti; 20-40 % for V, Cr, Sb, Pb, and Ni; 40-60 % for Ba and Cu; and 60-80 % for Zn, As, Se, Cd, and Mn. Metals (Al, Ti, and Fe) originated from crustal sources (e.g., soil dust) have much lower solubilities than those (Mn, Zn, As, Se, Cd, and Ba) from fossil fuel combustion sources (e.g., traffic emission, coal combustion), suggesting the dominant role the metal sources played on solubility. Enhanced solubilities of Cu, As, Se, Cd, Sn, Sb, and Pb were associated with aerosol acidity, while those of V, Cr, Mn, Ni, Zn, and Ba were linked to organic acid complexation. For the three crustal metals, the solubilities of Al and Ti primarily depended on aerosol acidity, whereas the solubility of Fe depended on both aerosol acidity under pH < 2 conditions and organic acid complexation under pH > 2 conditions. These findings underscore the primary influence of inherent properties of the metals on their solubility and reveal the varying impacts of atmospheric physicochemical processes, with changes in their solubilities being <10 % for Cd, Sn, Sb, and Pb, 10-20 % for Cu, Cr, Mn, Ni, and Ba, and 20-30 % for As, Se, and Zn.
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页数:12
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