Online single particle measurement of fireworks pollution during Chinese New Year in Nanning

作     者：Jingyan Li Tingting Xu Xiaohui Lu Hong Chen Sergey A.Nizkorodov Jianmin Chen Xin Yang Zhaoyu Mo Zhiming Chen Huilin Liu Jingying Mao Guiyun Liang 

作者机构：Shanghai Key Laboratory of Atmospheric Particle Pollution and PreventionDepartment of Environmental Science and EngineeringFudan UniversityShanghai 200433China Department of ChemistryUniversity of CaliforniaIrvineCalifornia 92697United States Fudan-Tyndall CenterPudan UniversityShanghai 200433China Guangxi Academy of Environmental SciencesNanning 530022China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2017年第29卷第3期

页      面：184-195页

核心收录：

学科分类：07[理学] 070602[理学-大气物理学与大气环境] 0706[理学-大气科学] 

基　　金：supported by the National Natural Science Foundation of China(Nos.91544224,41275126) the Ministry of Science&Technology of China(No.2012YQ220113-4) the Ministry of Environmental Protection of China(No.201409008) the Science&Technology Commission of Shanghai Municipality(No.14DZ1202900) 

主　　题：Chinese New YearFireworksParticle typesSecondary process 

摘      要：Time-resolved single-particle measurements were conducted during Chinese New Year in Nanning, China. Firework displays resulted in a burst of SO2, coarse mode, and accumulation mode （100-500 nm） particles. Through single particle mass spectrometry analysis, five different types of particles （fireworks-metal, ash, dust, organic carbon-sulfate （OC-sulfate）, biomass burning） with different size distributions were identified as primary emissions from firework displays. The fireworks-related particles accounted for more than 70% of the total analyzed particles during severe firework detonations. The formation of secondary particulate sulfate and nitrate during firework events was investigated on single particle level. An increase of sulfite peak （80SO3） followed by an increase of sulfate peaks （97HSO7＋96SO7） in the mass spectra during firework displays indicated the aqueous uptake and oxidation of SO2 on particles. High concentration of gaseous SO2, high relative humidity and high particle loading likely promoted SO2 oxidation. Secondary nitrate formed through gas-phase oxidation of NO2 to nitric acid, followed by the condensation into particles as ammonium nitrate. This study shows that under worm, humid conditions, both primary and secondary aerosols contribute to the particulate air pollution during firework displays.