【摘要】 研究北京和冲绳地区大气气溶胶中水溶性有机物的浓度水平、季节变化及粒径分布特征.采用分级采样法采集了2006年北京市及冲绳地区的大气颗粒物,用总有机碳(TOC)方法测定了水提取物中水溶性有机物的浓度.结果表明:北京地区水溶性有机物浓度范围为8.31~20.03μg.m-3;冲绳地区水溶性有机物浓度约为3.39μg.m-3.两地区大气细颗粒(粒径小于2.1μm)中水溶性有机物的浓度均最高,分别占总悬浮颗粒物中水溶性有机物的42%~53%(北京)和39%~46%(冲绳).北京地区大气中水溶性有机物浓度冬季最高,受当地排放源的影响较大;冲绳地区大气中水溶性有机物的浓度在春季最高,主要受到污染物远距离传输的影响.更多还原

【Abstract】 Studied the concentration,seasonal variation,size distribution of water soluble organic matter in atmospheric aerosols in the Beijing and the Okinawa area.Size fractionate aerosols were sampled in Beijing city and Okinawa islands respectively in 2006,water-distilled samples were analyzed by total organic carbon(TOC) analysis to obtain the concentration level of organic carbon.Results showed that the concentration of total water soluble organics in Beijing area ranged from 8.31～20.03 μg· m-3.The concentration of total water soluble organics in Okinawa area was 3.39 μg· m-3.Water soluble organics mainly existed in fine particles(d<2.1 μm),which account for 42%～53% of water soluble organics in total suspended particles in Beijing and 39%～46% in Okinawa.The concentration of water soluble organics in Beijing area was the highest in winter,which was influenced by local emissions;while the concentration of water soluble organics in Okinawa area was the highest in spring,with the main influence from long range transport of pollutants.更多还原