Acta Chim. Sinica ›› 2015, Vol. 73 ›› Issue (2): 131-136.DOI: 10.6023/A14120875 Previous Articles     Next Articles

Article

大气中SO2和HCOOH在CaO表面的耦合相互作用

吴玲燕a, 佟胜睿b, 葛茂发b   

  1. a 中国气象局大气化学重点开放实验室 中国气象科学研究院 北京 100081;
    b 分子动态与稳态结构国家重点实验室 北京分子科学国家实验室 中国科学院化学研究所 北京 100190
  • 收稿日期:2014-12-19 出版日期:2015-02-14 发布日期:2015-01-12
  • 通讯作者: 葛茂发, gemaofa@iccas.ac.cn; Tel.: 010-62554518 E-mail:gemaofa@iccas.ac.cn
  • 基金资助:

    项目受国家自然科学基金(Nos. 41405118, 41105085)、中国气象科学研究院基本科研业务费专项资金(No. 2014Y007)、中国科学院先导专项(Grant No. XDB05010400)资助.

Synergistic Effect between SO2 and HCOOH on the Surface of CaO

Wu Lingyana, Tong Shengruib, Ge Maofab   

  1. a Key Laboratory for Atmospheric Chemistry, Chinese Academy of Meteorological Sciences, Beijing 100081;
    b State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190
  • Received:2014-12-19 Online:2015-02-14 Published:2015-01-12
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Nos. 41405118, 41105085), the Basic Scientific Research Progress of The Chinese Academy of Meteorological Sciences (No. 2014Y007), the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (Grant No. XDB05010400).

Due to altering the properties of particles and the budget of trace gases, heterogeneous reactions on mineral aerosols become an important subject in the atmospheric chemistry. However, synergistic effects between trace gases on the surface of mineral aerosol are largely uncertain. In this work, the synergistic effect between SO2 and HCOOH on the surface of CaO was studied using in situ Diffusion Reflectance Infrared Fourier Spectroscopy (DRIFTS). From analysing of the spectral features and obtaining the kinetic curves, it is found that the heterogeneous reactions of SO2 and HCOOH on the surface of CaO blocked each other. In addtion, the formate and sulfite decreased when SO2 and HCOOH were introduced into the reaction chamber simultaneously. Synergistic effect between SO2 and HCOOH on the surface of CaO was mainly divided into two aspects according to step-by-step experiments. Less reactive sites available for adsorption because of the coexisting of SO2 inhibited the reaction of HCOOH on the surface of CaO, resulting in the decrease of the formation of formate. On the other hand, HCOOH could prevent SO2 from reacting with CaO so that the formation of sulfite decreased.

Key words: mineral aerosol, heterogeneous reaction, DRIFTS, formate, sulfite