【作者】 张凯； 王跃思； 温天雪； 何新星； 刘广仁；

【Author】 ZhANG Kai, WANG Yue-si, WEN Tian-xue, HE Xin-xing (LAPC, Institute of Atmospheric Physics, Chinese Academy of Science, Beijing, 100029, China)

【机构】 中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室；

【摘要】 本文利用大气细粒子的快速捕集及化学成分在线分析系统、离子色谱、RP1400a,研究了北京大气2004年1月3-12日可溶性PM10气溶胶颗粒中阴阳离子的组分和浓度变化范围、以及PM10在北京大气中的质量浓度,结果表明:北京大气PM10中可溶性阴离子主要有Cl-,NO2-,NO3-,SO42-组成,阳离子主要有Na+,NH4+,K+,Ga2+,Mg2+组成.Cl-,NO3-,SO42-的变化趋势有较好的一致性,NO2-的变辐不大,浓度比较稳定,SO42-的组分最高.阳离子除NH4+外平均浓度都低于2 ug/m3,NH4+浓度的日变化趋势与NO3-和SO42-浓度变化趋势具有一致性.北京大气PM10浓度偏高,空气污染严重.更多还原

【Abstract】 Using the system of rapid collection of fine particles, and ion chromatography, and RP1400a, this paper studies the element and concentration of water-soluble anions and cations in PM10, and the concentration of PM10, during January 3 to 12, 2004 in Beijing. The results show that the water-soluble anions in PM10 are mainly composed of Cl", NO2-,NO3-, SO42-, and the water-soluble cations are mainly composed of Na+, NH4+, K+, Ga2+, Mg2+. The variation trend of Cl", NO3-, SO42- in PM10 is very similar, and the variation of concentration range of NO2- is very narrow. The concentration of SO42- is highest among the water-soluble anions. The concentration of cations except NH4+ is lower than 2 μg/m3. Diurnal variation of concentration of NH4+ is similar to that of NO3- and SO42- .The concentration of PM10 in Beijing is higher than the criterion of air quality, which means that the air pollution in Beijing is still very serious.更多还原