Acta Chim. Sinica ›› 2016, Vol. 74 ›› Issue (5): 385-391.DOI: 10.6023/A16020105 Previous Articles     Next Articles



胡敏, 尚冬杰, 郭松, 吴志军   

  1. 环境模拟与污染控制国家重点联合实验室 北京大学环境科学与工程学院 北京 100871
  • 投稿日期:2016-02-26 发布日期:2016-04-08
  • 通讯作者: 胡敏
  • 基金资助:

    项目受国家自然科学基金(Nos. 91544214, 21190052, 41121004), 国家重点基础研究发展计划(No. 2013CB228503)和中国科学院战略性先导科技专项(No. XDB05010500)资助.

Mechanism of New Particle Formation and Growth as well as Environmental Effects under Complex Air Pollution in China

Hu Min, Shang Dongjie, Guo Song, Wu Zhijun   

  1. State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871
  • Received:2016-02-26 Published:2016-04-08
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Nos. 91544214, 21190052, 41121004), National Basic Research Program of China (No. 2013CB228503) and Special Fund for Strategic Pilot Technology Chinese Academy of Sciences (No. XDB05010500).

New particle formation (NPF) and its subsequent growth plays a key role in air quality and climate change at regional and global scales. Especially under complex air pollution in China, nucleation and growth can be highly efficient, claimed to be a main source of cloud condensation nuclei (CCN) and an important cause of secondary aerosol pollution. Currently, the mechanism of particle formation and growth as well as its environmental effects are still poorly understood. Thereby, fully understanding of the atmospheric nucleation and subsequent growth still presents a big challenge to atmospheric chemistry researches. This study reviews the current results from studies on mechanisms and environmental effects of atmospheric nucleation and growth. We summarize that traditional nucleation theories such as binary nucleation of H2SO4-H2O, ternary nucleation of H2SO4-NH3-H2O, ion-induced nucleation are not capable in explaining new particle formation under complex air pollution, while newly proposed mechanisms such as organic acids and amine induced nucleation were not verified because of technique limitation. We propose that the future researches should focus on identifying the key chemical precursor response for driving nucleation and initial and subsequent growth, and understand the physical and chemical processing of new particle formation and growth. In particularly, application and development of novel techniques, such as APi-TOF-CIMS, PSM, Nano-HTDMA in new particle formation study is very important. Also, future researches should establish whole process tracking on new particle formation, from precursor, nucleation, growth till the environmental effects, by integrating field observation, chamber simulation, and modelling. Currently, the mechanism of highly efficient nucleation and rapid growth taking place under complex air pollution in China is urgently needed to be in-depth studied in order to improve our understanding of regional haze formation. This could be helpful to understand the similarity and difference in the nucleation mechanism between clean and polluted atmospheric environments.

Key words: new particle formation, particle growth, transformation mechanism, environmental impact, complex air pollution