首页 | 本学科首页   官方微博 | 高级检索  
     检索      

北京市典型重污染过程中PM2.5载带水溶性无机离子污染特征分析
引用本文:石梦双,韩斌,杨文,张蕊,陈莉,白志鹏.北京市典型重污染过程中PM2.5载带水溶性无机离子污染特征分析[J].中国环境监测,2018,34(3):21-29.
作者姓名:石梦双  韩斌  杨文  张蕊  陈莉  白志鹏
作者单位:天津师范大学城市与环境科学学院;中国环境科学研究院环境基准与风险评估国家重点实验室
基金项目:环境保护部2013公益项目"PM2.5/PM10自动监测的标准量值传递和QA/QC关键技术研究"(201309010)
摘    要:为研究北京地区冬季PM_(2.5)载带的水溶性无机离子组分污染特征,2013年1月在中国环境科学研究院内采用在线离子色谱(URG-9000B,AIM-IC)对PM_(2.5)中水溶性无机离子(SO_4~(2-)、NO_3~-、Cl~-、NH_4~+、Na~+、K~+、Mg~(2+)、Ca~(2+))进行监测与分析。结果表明,采样期间总水溶性无机离子(TWSI)浓度为61.0μg/m~3,其中二次无机离子SO_4~(2-)、NO_3~-、NH_4~+(SNA)占比达72.3%,在PM_(2.5)中占比为40.29%,表明北京市PM_(2.5)二次污染严重。重污染天NO_3~-]/SO_4~(2-)]表明,固定源污染较移动源更为显著。三元相图表明,在空气质量为优的情况下,NH_4~+(在SNA中占比为30.3%~65.5%,下同)主要以NH_4NO_3的形式存在,较少比例以(NH_4)_2SO_4存在;严重污染时,NH_4~+(47.3%~77.9%)主要以(NH_4)_2SO_4形式存在,其次以NH_4NO_3的形式存在,其余的NH_4~+以NH_4Cl的形式存在。NO_3~-]/SO_4~(2-)]日变化表明,早、晚机动车高峰影响北京重污染发生。

关 键 词:PM2.5  水溶性无机离子  重污染  SNA
收稿时间:2016/12/6 0:00:00
修稿时间:2017/2/22 0:00:00

Characteristics of Water Soluble Inorganic Ions Carried in PM2.5 of Typical Heavy Haze Episodes in Beijing
SHI Mengshuang,HAN Bin,YANG Wen,ZHANG Rui,CHEN Li and BAI Zhipeng.Characteristics of Water Soluble Inorganic Ions Carried in PM2.5 of Typical Heavy Haze Episodes in Beijing[J].Environmental Monitoring in China,2018,34(3):21-29.
Authors:SHI Mengshuang  HAN Bin  YANG Wen  ZHANG Rui  CHEN Li and BAI Zhipeng
Institution:College of Urban and Environmental Science, Tianjin Normal University, Tianjin 300387, China;State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,College of Urban and Environmental Science, Tianjin Normal University, Tianjin 300387, China and College of Urban and Environmental Science, Tianjin Normal University, Tianjin 300387, China;State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
Abstract:To investigate the characteristics of water-soluble inorganic ions carried in PM2.5 in winter Beijing, during January 2013, the hourly mass concentration of PM2.5 and the water soluble inorganic ions (SO42-,NO3-,Cl-,NH4+,Na+,K+,Mg2+,Ca2+) were analyzed by online ion chromatography(URG-9000B,AIM-IC)in Chinese Research Academy of Environmental Sciences. The results showed that the total mass concentration of 8 water soluble inorganic ions was 61.01 g/m3. NO3-, NH4+, SO42- (SNA) accounted for 72.30% of all measured water soluble inorganic ions, and was up to 40.29% of PM2.5, indicating that PM2.5 secondary pollution was serious in Beijing. The mass ratio ofNO3-]/SO42-] demonstrated that the fixed sources has greater impact on air pollution during heavy pollution days than mobile source. SNA triangular diagram showed that NH4+ in PM2.5 mostly coexisted in the form of NH4NO3 followed by (NH4)2SO4, when the air quality was good. However, in poor air condition, the aerosol was in the form of (NH4)2SO4 and NH4NO3 followed by NH4Cl, and the daily variation ofNO3-]/SO42-] ratio indicated that morning and evening motor vehicle peak have impact on the happen of heavy haze in winter Beijing.
Keywords:PM2  5  water soluble inorganic ions  heavy pollution  SNA
本文献已被 CNKI 等数据库收录!
点击此处可从《中国环境监测》浏览原始摘要信息
点击此处可从《中国环境监测》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号