有机胺促进大气气溶胶成核机理研究进展  

Research progress of mechanism of atmospheric aerosol nucleation promoted by organic amines

作　　者：陈娇 王根 隋新秀 谢丰 赵森 CHEN Jiao;WANG Gen;SUI Xinxiu;XIE Feng;ZHAO Sen(Anhui Meteorological Observatory,Hefei 230031,China;School of Electronic Engineering,Chaohu University,Hefei 238024,China)

机构地区：[1]安徽省气象台,安徽合肥230031 [2]巢湖学院电子工程学院,安徽合肥238024

出　　处：《大气与环境光学学报》2024年第2期142-161,共20页Journal of Atmospheric and Environmental Optics

基　　金：安徽省气象局创新发展专项(CXB202101),安徽省自然科学基金(2308085QD130,2108085QD183)。

摘　　要：新粒子生成是大气气溶胶和云凝结核的重要来源,影响着全球气候变化、空气质量、生态系统以及人类健康。然而目前对新粒子生成机制的研究和认识仍存在一定的局限性,特别是对可能参与并促进成核的关键前体物种的认识还非常有限。大气中有机胺的种类丰富,结构复杂,是常见的有机碱,具有独特的酸碱中和能力,一直以来备受关注。鉴于有机胺对新粒子生成具有非常重要的作用,从实验室模拟、外场观测和模型计算三个角度综述了有机胺促进新粒子生成机制方面的研究。实验室和外场观测研究均证实了硫酸-有机胺分子簇的存在,且同等浓度下有机胺对大气成核的促进作用高于氨;而模型计算也表明了有机胺更容易和硫酸发生酸碱反应形成更为稳定的氢键分子簇,从而降低成核能垒,促进新粒子生成。最后,对新粒子生成的研究前景进行了展望。New particle formation is an important source of atmospheric aerosols and cloud condensation nuclei,which can indirectly affect global climate,air quality,ecosystem and human health.However,there are still certain limitaions in the current research and understanding of new particle formation mechanisms,especially in the understanding of key precursor species that may participate in and promote nucleation.Organic amines are abundant in the atmosphere with complex structures.As common organic bases with unique ability of acid-base neutralization,they have always attracted much attention.In view of the crucial role of organic amines in the formation of new particles,the research progress on the mechanism of organic amines promoting the formation of new particles from is reviewed in three perspectives:laboratory simulations,field observations and model calculations.Both laboratory studies and field observations have confirmed the existence of sulfuric acid-organic amine molecular clusters,and organic amines promote atmospheric nucleation more effective than ammonia at the same concentration.The model calculations also show that organic amines are more likely to react with sulfuric acid to form more stable hydrogen bond molecular clusters,thereby overcoming the free energy nucleation barrier and promoting the formation of new particles.Finally,the important role of amines in the formation of new particles is summarized,and a prospect for the future research on new particle formation is given.

关 键 词：新粒子生成 有机胺 成核机理 团簇 

分 类 号：P426[天文地球—大气科学及气象学]