Composition and hygroscopicity of aerosol particles at Mt. Lu in South China: implications for acid precipitation

Research output: Contribution to journalArticlepeer-review

Standard

Composition and hygroscopicity of aerosol particles at Mt. Lu in South China : implications for acid precipitation. / Li, Weijun; Chi, Jianwei; Shi, Zongbo; Wang, Xinfeng; Chen, Bin; Wang, Yan; Li, Tao; Chen, Jianmin; Zhang, Daizhou; Wang, Zifa; Shi, Chune; Liu, Liangke; Wang, Wenxing.

In: Atmospheric Environment, Vol. 94, 09.2014, p. 626-636.

Research output: Contribution to journalArticlepeer-review

Harvard

Li, W, Chi, J, Shi, Z, Wang, X, Chen, B, Wang, Y, Li, T, Chen, J, Zhang, D, Wang, Z, Shi, C, Liu, L & Wang, W 2014, 'Composition and hygroscopicity of aerosol particles at Mt. Lu in South China: implications for acid precipitation', Atmospheric Environment, vol. 94, pp. 626-636. https://doi.org/10.1016/j.atmosenv.2014.06.003

APA

Li, W., Chi, J., Shi, Z., Wang, X., Chen, B., Wang, Y., Li, T., Chen, J., Zhang, D., Wang, Z., Shi, C., Liu, L., & Wang, W. (2014). Composition and hygroscopicity of aerosol particles at Mt. Lu in South China: implications for acid precipitation. Atmospheric Environment, 94, 626-636. https://doi.org/10.1016/j.atmosenv.2014.06.003

Vancouver

Author

Li, Weijun ; Chi, Jianwei ; Shi, Zongbo ; Wang, Xinfeng ; Chen, Bin ; Wang, Yan ; Li, Tao ; Chen, Jianmin ; Zhang, Daizhou ; Wang, Zifa ; Shi, Chune ; Liu, Liangke ; Wang, Wenxing. / Composition and hygroscopicity of aerosol particles at Mt. Lu in South China : implications for acid precipitation. In: Atmospheric Environment. 2014 ; Vol. 94. pp. 626-636.

Bibtex

@article{6eb3efd40b774705a24b0d52df37245f,
title = "Composition and hygroscopicity of aerosol particles at Mt. Lu in South China: implications for acid precipitation",
abstract = "Physicochemical properties of aerosol particles were studied at Mt. Lu, an elevated site (115°59′E, 29°35′N, 1165 m) within the acid precipitation area. Northeast winds transport copious amounts of air pollutants and water vapor from the Yangtze River Delta into this acid precipitation area. NH4+ and SO42− are the dominant ions in PM2.5 and determine aerosol acidity. Individual particle analysis shows abundant S-rich and metals (i.e. Fe-, Zn-, Mn-, and Pb-rich) particles. Unlike aerosol particles in North China and urban areas, there are little soot and mineral particles at Mt. Lu. Lack of mineral particles contributed to the higher acidity in precipitation in the research area. Nano-sized spherical metal particles were observed to be embedded in 37% of S-rich particles. These metal particles were likely originated from heavy industries and fired-power plants. Hygroscopic experiments show that most particles start to deliquesce at 73–76% but organic coating lowers the particle deliquescence relative humidity (DRH) to 63–73%. The DRHs of these aerosol particles are clearly smaller than that of pure ammonium sulfate particles which is 80%. Since RH in ambient air was relatively high, ranging from 65% to 85% during our study period, most particles at our sampling site were in liquid phase. Our results suggest that liquid phase reactions in aerosol particles may contribute to SO2 to sulfuric acid conversion in the acid precipitation area.",
keywords = "Acid precipitation, Hygroscopicity, Aerosol formation, Individual particle",
author = "Weijun Li and Jianwei Chi and Zongbo Shi and Xinfeng Wang and Bin Chen and Yan Wang and Tao Li and Jianmin Chen and Daizhou Zhang and Zifa Wang and Chune Shi and Liangke Liu and Wenxing Wang",
year = "2014",
month = sep,
doi = "10.1016/j.atmosenv.2014.06.003",
language = "English",
volume = "94",
pages = "626--636",
journal = "Atmospheric Environment",
issn = "1352-2310",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Composition and hygroscopicity of aerosol particles at Mt. Lu in South China

T2 - implications for acid precipitation

AU - Li, Weijun

AU - Chi, Jianwei

AU - Shi, Zongbo

AU - Wang, Xinfeng

AU - Chen, Bin

AU - Wang, Yan

AU - Li, Tao

AU - Chen, Jianmin

AU - Zhang, Daizhou

AU - Wang, Zifa

AU - Shi, Chune

AU - Liu, Liangke

AU - Wang, Wenxing

PY - 2014/9

Y1 - 2014/9

N2 - Physicochemical properties of aerosol particles were studied at Mt. Lu, an elevated site (115°59′E, 29°35′N, 1165 m) within the acid precipitation area. Northeast winds transport copious amounts of air pollutants and water vapor from the Yangtze River Delta into this acid precipitation area. NH4+ and SO42− are the dominant ions in PM2.5 and determine aerosol acidity. Individual particle analysis shows abundant S-rich and metals (i.e. Fe-, Zn-, Mn-, and Pb-rich) particles. Unlike aerosol particles in North China and urban areas, there are little soot and mineral particles at Mt. Lu. Lack of mineral particles contributed to the higher acidity in precipitation in the research area. Nano-sized spherical metal particles were observed to be embedded in 37% of S-rich particles. These metal particles were likely originated from heavy industries and fired-power plants. Hygroscopic experiments show that most particles start to deliquesce at 73–76% but organic coating lowers the particle deliquescence relative humidity (DRH) to 63–73%. The DRHs of these aerosol particles are clearly smaller than that of pure ammonium sulfate particles which is 80%. Since RH in ambient air was relatively high, ranging from 65% to 85% during our study period, most particles at our sampling site were in liquid phase. Our results suggest that liquid phase reactions in aerosol particles may contribute to SO2 to sulfuric acid conversion in the acid precipitation area.

AB - Physicochemical properties of aerosol particles were studied at Mt. Lu, an elevated site (115°59′E, 29°35′N, 1165 m) within the acid precipitation area. Northeast winds transport copious amounts of air pollutants and water vapor from the Yangtze River Delta into this acid precipitation area. NH4+ and SO42− are the dominant ions in PM2.5 and determine aerosol acidity. Individual particle analysis shows abundant S-rich and metals (i.e. Fe-, Zn-, Mn-, and Pb-rich) particles. Unlike aerosol particles in North China and urban areas, there are little soot and mineral particles at Mt. Lu. Lack of mineral particles contributed to the higher acidity in precipitation in the research area. Nano-sized spherical metal particles were observed to be embedded in 37% of S-rich particles. These metal particles were likely originated from heavy industries and fired-power plants. Hygroscopic experiments show that most particles start to deliquesce at 73–76% but organic coating lowers the particle deliquescence relative humidity (DRH) to 63–73%. The DRHs of these aerosol particles are clearly smaller than that of pure ammonium sulfate particles which is 80%. Since RH in ambient air was relatively high, ranging from 65% to 85% during our study period, most particles at our sampling site were in liquid phase. Our results suggest that liquid phase reactions in aerosol particles may contribute to SO2 to sulfuric acid conversion in the acid precipitation area.

KW - Acid precipitation

KW - Hygroscopicity

KW - Aerosol formation

KW - Individual particle

U2 - 10.1016/j.atmosenv.2014.06.003

DO - 10.1016/j.atmosenv.2014.06.003

M3 - Article

VL - 94

SP - 626

EP - 636

JO - Atmospheric Environment

JF - Atmospheric Environment

SN - 1352-2310

ER -