Acidic gases, ammonia and water-soluble ions in PM(2.5) at a coastal   site in the Pearl River Delta, China

doi:10.1016/j.atmosenv.2008.02.015

CORC > 北京大学 > 环境科学与工程学院

	Acidic gases, ammonia and water-soluble ions in PM(2.5) at a coastal site in the Pearl River Delta, China
	Hu, Min ; Wu, Zhijun ; Slanina, J. ; Lin, Peng ; Liu, Shang ; Zeng, Limin
刊名	大气环境
	2008
关键词	acidic gases ammonia water-soluble ions PM(2.5) Pearl River Delta (PRD) China JET AEROSOL COLLECTOR NITROUS-ACID NITRIC-ACID HETEROGENEOUS FORMATION DISSOCIATION-CONSTANT SEASONAL-VARIATIONS PARTICULATE MATTER AGRICULTURAL SITE RURAL SITE PARTICLE
DOI	10.1016/j.atmosenv.2008.02.015
英文摘要	Real-time measurements of acidic trace gases (HCl, HNO(3), HONO, and SO(2)), ammonia, and water-soluble ions in PM(2.5) were conducted at Xinken, a coastal site downwind of Guangzhou, from 4 October to 4 November 2004, as part of the Pearl River Delta (PRD) intensive field campaign. The average concentrations of HCl, HONO, HNO(3), SO(2), and NH(3) are 2.8, 2.9, 6.3, 55.4, and 7.3 mu g m(-3) respectively, and 2.4, 7.2, 24.1, and 9.2 mu g m(-3) for Cl(-), NO(3)(-), SO(4)(2-), and NH(4)(+) in PM(2.5). The diurnal variations of both HCl and HNO(3) showed higher concentrations during daytime and lower concentrations at night, and aerosol Cl(-) and NO(3)(-) showed an opposite diurnal patterns to HCl and HNO(3). The diurnal variation of NH(3) showed the similar pattern to that of aerosol NH(4)(+) with lower concentration during daytime and higher concentration at night. The average concentration of SO(2) during daytime was higher than that at night. The transportation of urban plumes to the sampling site could explain the higher concentration of SO(2) during daytime. HONO showed a clear diurnal variation with lower concentration during daytime and higher concentration at night. The HONO concentrations were positively correlated with the particle surface area concentrations, suggesting the formation of HONO through the heterogeneous conversion on particle surfaces could be significant. The ionic charge balance analysis included the cations derived from filter measurements indicates that the contribution of the cations in fine particle (PM(1.8)) to the charge balance is not pronounced. The theoretical equilibrium constant (K(e)) of NH(4)NO(3) is higher than the observed concentration product (K(m) = [NH(3)] x [HNO(3)]) during daytime, and lower than K(m) at night. This indicates that the atmospheric conditions during the sampling period did not favor the formation of NH(4)NO(3) during daytime. (c) 2008 Elsevier Ltd. All rights reserved.; Environmental Sciences; Meteorology & Atmospheric Sciences; SCI(E); EI; 46; ARTICLE; 25; 6310-6320; 42
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/158685]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Hu, Min,Wu, Zhijun,Slanina, J.,et al. Acidic gases, ammonia and water-soluble ions in PM(2.5) at a coastal site in the Pearl River Delta, China[J]. 大气环境,2008.
APA	Hu, Min,Wu, Zhijun,Slanina, J.,Lin, Peng,Liu, Shang,&Zeng, Limin.(2008).Acidic gases, ammonia and water-soluble ions in PM(2.5) at a coastal site in the Pearl River Delta, China.大气环境.
MLA	Hu, Min,et al."Acidic gases, ammonia and water-soluble ions in PM(2.5) at a coastal site in the Pearl River Delta, China".大气环境 (2008).