Abstract:Monocarboxylic acids in the atmoshperic PM10 and PM2.5 of Beijing were determined by GC-MS from September 2006 to August 2007. 21 n-alkanoic acids (C10~C30) and 3 alkenoic acids including oleic(C18:1), linoleic(C18:2) and eleostearic acid(C18:3) were detected, among which C16 and C18 were the most abundant. Total concentrations of monocarboxylic acids in PM10 varied from 61.7 to 1652.3ng/m3, annual averaged 426.2ng/m3, while in PM2.5 the concentrations ranged from 34.5 to 992.1ng/m3, annual averaged 319.6ng/m3. 75% of those monocarboxylic acids distributed in the fine particle. Concentrations of monocarboxylic acids in spring, summer, autumn and winter were (625.1±403.8), (200.0±95.3), (263.0±201.1), (659.9± 433.5)ng/m3 (PM10) and (431.7±211.0), (194.4±95.8), (207.9±160.8), (463.6±262.1)ng/m3 (PM2.5), respectively. They were apparently higher in winter and spring than in summer and autumn.Source apportionments implied that coal burning for heating was the most important anthropogenic source in winter, while automobile exhaust contributed most in other seasons.
刘晨书, 李杏茹, 张姗姗, 郭雪清, 王跃思. 北京大气颗粒物中一元羧酸的季节变化和来源分析[J]. 中国环境科学, 2009, 29(7): 673-678.
LIU Chen-Shu, LI Xing-Ru, ZHANG Shan-Shan, GUO Xue-Qing, WANG Yue-Si. Seasonal variations and sources of monocarboxylic acids in the atmospheric PM10 and PM2.5 of Beijing. . CHINA ENVIRONMENTAL SCIENCECE, 2009, 29(7): 673-678.