Abstract：Simultaneous measurements of water-soluble inorganic ions in PM2.5 and related gaseous pollutants in November 2008 and in January 2009 were made by using an versatile air pollutants sampler (URG-3000K) and a DX-600 ion chromatography in the northeastern urban area of Beijing. The mass concentrations of PM2.5 showed the “3 peaks” changing style, and in the “3 peaks” period, the mass concentrations of PM2.5 became higher with the sampling time passed by. The pollution level of the major water-soluble inorganic ions in PM2.5 decreased compared with the past monitoring results in Beijing and other big cities. PM2.5 had weak acidity, which would promote the acidification of the atmosphere environment and the forming of acidic precipitation. NH4+ in PM2.5 existed mainly in the form of sulfate, nitrate and chloride. The mass concentrations of SO42- and NO3- in PM2.5 had the similar variation trend with those of SO2 and NO2, respectively. SO42- and NO3- in PM2.5 were mainly transformed from SO2 and NO2, respectively, and the second conversion rate of NO2 was lower than that of SO2.
邓利群, 李红, 柴发合, 伦小秀, 陈义珍, 张新民, 王峰威. 北京市东北城区冬季大气细粒子与相关气体污染特征[J]. 中国环境科学, 2010, 30(7): 954-961.
DENG Li-Qun, LI Hong, CHAI Fa-He, LUN Xiao-Xiu, CHEN Yi-Zhen, ZHANG Xin-Min, WANG Feng-Wei. Pollution characteristics of the atmospheric fine particles and related gaseous pollutants in the northeastern urban area of Beijing in winter season. CHINA ENVIRONMENTAL SCIENCECE, 2010, 30(7): 954-961.