南京北郊霾天气溶胶化学组分粒径分布特征  

Distribution characteristics of chemical components in aerosol during haze days in north suburban Nanjing

作　　者：张程 于兴娜[1] 安俊琳[1] 李岩[1] 赵睿东 赵博 肖伟生 ZHANG Cheng;YU Xing-na;AN Jun-lin;LI Yan;ZHAO Rui-dong;ZHAO Bo;XIAO Wei-sheng(Key Laboratory of Meteorological Disaster,Ministry of Education,Joint International Research Laboratory of Climate and Environment Change,Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration,Nanjing University of Information Science and Technology,Nanjing 210044,China;Guangdong Emergency Early Warning Release Center,Guangzhou 510080,China)

机构地区：[1]南京信息工程大学气象灾害教育部重点实验室,气候与环境变化国际合作联合实验室,气象灾害预报预警与评估协同创新中心,中国气象局气溶胶与云降水重点开放实验室,江苏南京210044 [2]广东省突发事件预警信息发布中心,广东广州510080

出　　处：《中国环境科学》2018年第8期2873-2881,共9页China Environmental Science

基　　金：国家重点研发计划资助项目(2016YFC0203501); 国家自然科学基金资助项目(91544229,41475142,41775154); 广东省自然科学基金-重大基础研究培育资助项目(2015A030308014); 江苏省高校＂青蓝工程＂项目; 江苏高校优势学科建设工程项目(PAPD)

摘　　要：为研究南京霾天气中大气气溶胶化学成分及其粒径分布的特征,使用β射线测尘仪、安德森9级撞击式采样器、离子色谱分析仪和热光碳分析仪对南京冬、春季节的颗粒物进行了采样分析.结果表明,霾日中3种主要二次离子SO_4^(2-)、NO_3^-和NH_4^+在细粒径段中占比最高(77.4%),霾日中除F^-和Cl^-外其余离子均呈三峰型分布,工业排放、生物质燃烧与二次反应是粗、细粒径段中水溶性离子最重要来源.OC、EC均主要富集于细粒子中,PM_(2.1～10)中OC与EC相关性较好(R^2=0.76),说明存在共同来源.通过OC/EC特征物比值的方法得到霾日期间碳质颗粒物的来源为机动车尾气排放、燃煤和生物质燃烧.Particles were collected during winter and spring by ray β dust instrument, Andersen cascade sampler and analyzed by ion chromatography and carbon analyzer. The results showed that the proportion of SO4^2-、NO3^- and NH4^＋ in fine particles was the highest（77.4%） during hazy days. The spectral of most ions for hazy days showed trimodal distributions. The industrial emission, biomass burning and secondary reaction were the most important pollution sources of ions. OC and EC were enriched in fine particles. A good relation（R^2=0.76） between OC and EC suggested that the same source in Pm^2.1～10. Ratios of OC and EC indicated that the main sources of carbonaceous particles were vehicle exhaust, coal combustion and biomass burning during hazy days.

关 键 词：霾 气溶胶 污染来源 南京 

分 类 号：X513[环境科学与工程—环境工程]