大气中氨基酸的来源及氮同位素分馏机制  

Sources and nitrogen isotope fractionation mechanisms of atmospheric amino acids

作　　者：朱仁果 肖化云 ZHU Renguo;XIAO Huayun(Jiangxi Provincial Key Laboratory of Genesis and Remediation of Groundwater Pollution,East China University of Technology,Nanchang 330013,China;School of Agriculture and Biology,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]东华理工大学地下水污染成因与修复江西省重点实验,江西南昌330013 [2]上海交通大学农业与生物学院,上海200240

出　　处：《地学前缘》2025年第3期362-374,共13页Earth Science Frontiers

基　　金：国家自然科学基金项目(42363011);江西省自然科学基金项目(20242BAB25185)。

摘　　要：近年来气溶胶中包括游离态氨基酸(FAAs)和结合态氨基酸(CAAs)在内的蛋白质类物质已被广泛关注。这是因为氨基酸在全球气候变化、空气污染物的去除效率、大气氮的生物利用性、二次有机气溶胶的形成以及对人体健康的影响等方面发挥着重要作用。本文将重点阐述氨基酸单体的稳定氮同位素这一新技术在示踪大气氨基酸来源和转化过程中的应用,综述潜在大气释放源中氨基酸单体的稳定氮同位素特征及其在燃烧和大气过程中的稳定氮同位素分馏机制。在未来的工作中需进一步研究不同粒径大小、不同气象条件下和特殊污染事件中的氨基酸单体的同位素分馏机制,这将有助于阐明氨基酸在云和降水形成、气候变化以及污染事件中所发挥的作用和贡献。In recent years,amino acids in aerosols,including free amino acids(FAAs)and combined amino acids(CAAs),have attracted widespread attention.This is due to the significant roles these proteinaceous substances play in global climate change,the removal efficiency of air pollutants,the bioavailability of atmospheric nitrogen,the formation of secondary organic aerosols,and their effects on human health.This paper focuses on the application of stable nitrogen isotopes of compound-specific amino acids,a new technique,in tracing the sources and transformation processes of atmospheric amino acids.It reviews the stable nitrogen isotope characteristics of individual amino acids in potential atmospheric protein emission sources,as well as the mechanisms of stable nitrogen isotope fractionation during combustion processes and atmospheric transformations.Future research should further investigate the isotopic fractionation mechanisms of individual amino acid under different particle sizes,meteorological conditions,and special pollution events.This will help clarify the role and contribution of amino acids in cloud and precipitation formation,climate change,and pollution events.

关 键 词：游离态氨基酸 结合态氨基酸 稳定氮同位素 分馏机制 

分 类 号：P402[天文地球—大气物理学与大气环境]