Evaluation on the role of sulfuric acid in the mechanisms of new particle formation for Beijing case
Evaluation on the role of sulfuric acid in the mechanisms of new particle formation for Beijing case
复制标题
北京案例评价硫酸在新颗粒形成机制中的作用
DOI：
10.5194/acp-11-12663-2011
复制
发表时间：
2011-12
影响因子：
6.3
通讯作者：
Boy, M.
中科院分区：
文献类型：
--
作者：
Wang, Z. B.;Hu, M.;Yue, D. L.;Zheng, J.;Zhang, R. Y.;Wiedensohler, A.;Wu, Z. J.;Nieminen, T.;Boy, M.
抽象的。新粒子形成（NPF）被认为是气体向粒子转化的重要机制，而气态硫酸被认为是关键的前体。到目前为止，国内对硫酸成核机理和硫酸作用的现场研究很少。在这项研究中，同时测量的颗粒数尺寸分布和气态硫酸浓度进行了从2008年7月至9月。在整个85个活动日期间，总共观察到22个新的颗粒形成事件。结果表明，在源、汇值均较高的情况下，源、汇竞争的结果更可能是决定北京NPF事件观测的关键限制因素。气态硫酸的浓度显示出与新鲜成核颗粒（N 3-6）和形成速率（J 3和J 1.5）的良好相关性。采用H2SO 4浓度与N3 -6或J的幂律关系探讨了成核机理。指数的变化范围很大（从1到7）。超过一半的NPF事件表现出大于2.5的指数。在这些情况下，热力学过程比活化或动力学成核理论更能解释北京城市大气中的成核现象。
Abstract. New particle formation (NPF) is considered as an important mechanism for gas-to-particle transformation, and gaseous sulfuric acid is believed as a crucial precursor. Up to now few field-based studies on nucleation mechanisms and the role of sulfuric acid were conducted in China. In this study, simultaneously measurements of particle number size distributions and gaseous sulfuric acid concentrations were performed from July to September in 2008. Totally, 22 new particle formation events were observed during the entire 85 campaign days. The results show that in the case of both higher source and sink values, the result of the competition between source and sink is more likely the key limiting factor to determine the observation of NPF events in Beijing. The concentrations of gaseous sulfuric acid show good correlations with freshly nucleated particles ( N 3-6 and formation rates ( J 3 and J 1.5 . The power-law relationship between H 2 SO 4 concentration and N 3-6 or J is adopted to explore the nucleation mechanism. The exponents are showed a great range (from 1 to 7). More than half of the NPF events exhibit an exponent larger than 2.5. For these cases, the thermodynamic process works better than the activation or kinetic nucleation theories to explain the nucleation events in urban atmosphere of Beijing.
登录
查看更多内容
影响因子：
6.3
作者：
Paasonen, P.;Nieminen, T.;Kulmala, M.
通讯作者：
Kulmala, M.
影响因子：
2
作者：
R. Dmochowski
通讯作者：
R. Dmochowski
DOI：
10.1016/j.respe.2020.09.004
发表时间：
2020-10-10
期刊：
Revue D'Epidemiologie et De Sante Publique
影响因子：
--
作者：
La rédaction
通讯作者：
La rédaction
影响因子：
9.3
作者：
通讯作者：
--