摘要：Ultra-high-resolution mass spectrometry was used to investigate the characterization of aerosol organonitrates (ONs). ONs featured high-molecular-weight (HMW), high unsaturation, and high functionalization. Under high air pollution events, the number of N1Ox class ONs composed of aliphatic and aromatic compounds increased with high levels of oxidation. In the daytime, highly unsaturated aliphatic-ONs were continuously produced. In the nighttime, the atmospheric oxidation of NO3 radicals promoted ONs. N2Ox class ONs were mainly comprised of multi-generation oxidated aliphatic compounds with high unsaturation. Most of the N2Ox-ONs were from cooking. Biomass burning also played an indelible role in the formation of ONs. In the daytime, atmospheric photodegradation led to the removal of the HMW ONs, especially aliphatic ONs. During nighttime, the NO3 oxidation radicals inhibited the generation of ONs, especially anthropogenic ONs. This study improves the understanding of the source, formation, and evolution of HMW ONs under the demand for continuous PM mitigation.

ISSN号：2397-3722

卷、期、页：卷8期1

发表日期：2025-02-14

期刊分区（SCI为中科院分区）：一区

收录情况：SCI（科学引文索引印刷版）,SCIE（科学引文索引网络版）

发表期刊名称：NPJ CLIMATE AND ATMOSPHERIC SCIENCE

参与作者：杜阳,车翰雄,鲍子尔,刘一良,李青,胡淼,周佳伟,张蜀敏,姚小江,韩艳,孟令硕,龙鑫,齐心,陈阳

第一作者：史权,陈春茂,何晨

论文类型：期刊论文

论文概要：杜阳,车翰雄,鲍子尔,刘一良,李青,胡淼,周佳伟,张蜀敏,姚小江,史权,陈春茂,韩艳,孟令硕,龙鑫,齐心,何晨,陈阳，Evolution of atmospheric high-molecular-weight Organonitrates (HMW ONs) in urban Yangtze River Delta (YRD), China，NPJ CLIMATE AND ATMOSPHERIC SCIENCE，2025，卷8期1

论文题目：Evolution of atmospheric high-molecular-weight Organonitrates (HMW ONs) in urban Yangtze River Delta (YRD), China