文献类型：期刊文献

英文题名：Surface components of PM2.5 during clear and hazy days in Shanghai by ToF-SIMS

作者：Huang, Di[1];Xiu, Guangli[1];Li, Meng[1];Hua, Xin[2];Long, Yitao[1,2]

机构：[1]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2017

卷号：148

起止页码：175

外文期刊名：ATMOSPHERIC ENVIRONMENT

收录：;EI(收录号：20164803057520);WOS:【SCI-EXPANDED(收录号:WOS:000389394900016)】；

基金：This publication was supported financially by NSFC (21277044), Ph.D. Programs Foundation of Ministry of Education of China (No.20120074140001). This work was also supported by Australia China Centre for Air Quality Science and Management (ACC-AQSM).

语种：英文

外文关键词：Haze pollution; PM2.5; ToF-SIMS; Surface analysis

摘要：The compositions of atmospheric particles change greatly on hazy days and could threaten human health. In this study, fine mode particles (PM2.5) were collected and divided according to hazy and non hazy days in Shanghai from December 8th, 2015 to January 12th, 2016. Versatile ToF-SIMS was performed on the samples to reveal chemical information from the surface of PM2.5. Normalized intensities of Na, Mn, K, V, Al, Fe, Ca, Ti, Cl, NOx, and ammonia were higher on clear days while peak intensities of detected bromine and sulfur-contained species were much higher on hazy days. Some hazardous species (Pb, Cr, Ni, As, CHS, SO2) and high-mass aromatic hydrocarbon fractions could only be detected by ToF-SIMS from PM2.5 collected on hazy days. Comparison of metallic elements and phthalates implied that haze pollution in Shanghai was mainly the mixing of coal combustion with vehicle emission. In addition, comparison of different haze pollution was also exhibited. Some nitrogen-containing organic compounds were detected only from PM2.5 of December 15th, and ToF-SIMS ion signals of N2H5+ NH4+, CN-, NO2- and NO3- from PM2.5 of December 15th were much more intense, compared with PM2.5 collected on December 25th. (C) 2016 Elsevier Ltd. All rights reserved.