北京初冬季PM_(2.5)中无机元素与二次水溶性离子浓度特征  

Characteristics of water-soluble inorganic ions and inorganic elements of PM_(2.5) in Beijing

作　　者：贾岳清 殷惠民[1] 周瑞[1] 于跃[1] 曹冠 谢辉 张烃[1] 杨勇杰[1] JIA Yueqing;YIN Huimin;ZHOU Rui;YU Yue;CAO Guan;XIE Hui;ZHANG Ting;YANG Yongjie(National Research Center for Environmental Analysis and Measurement, Beijing, 100029, China)

机构地区：[1]国家环境分析测试中心,北京100029

出　　处：《环境化学》2018年第12期2767-2773,共7页Environmental Chemistry

基　　金：环保公益性行业科研专项(201509062);国家重点研发计划项目(2016YFC0206204;2016YFC0208104)资助~~

摘　　要：为研究北京城区初冬季大气颗粒物中水溶性二次无机离子及元素的组成特征,2016年11月,利用青岛明华MH-16型PM_(2.5)采样器在北京城区采样点进行大气颗粒物采样,样品采用离子色谱和电感耦合等离子体质谱分析.结果表明,NO_3^-、SO_4^(2-)和NH_4^+在观测期间平均浓度分别为20.5±11.4μg·m^(-3),13.4±12.1μg·m^(-3)和10.7±8.8μg·m^(-3),SNA(sulfate、nitrate、ammonium)总浓度为44.6±45.2μg·m^(-3).采样期间颗粒物中K、Fe、Na、Zn、Ca、Al、Mg及Pb元素的质量浓度比较高,占所分析元素总浓度的94.5%.采样期间Cr、Ni、Pb、Mn等元素的富集因子>10,Zn、Cu、As、Mo等元素的EF值超过100.Particulate matters were sampled with a Qingdao Minghua MH-16 PM2.5 sampler to investigate the features of water-soluble inorganic ions and inorganic elements in Beijing. The water-soluble inorganic ions were analyzed by ions chromatography (IC), and inorganic elements were analyzed by Inductively coupled plasma mass spectrometry (ICP-MS). The analysis results showed that the concentrations of NO3^-, SO4^2- and NH4^+ were 20.5±11.4, 13.4±12.1 and 10.7±8.8 μg·m^-3. Concentration of the total secondary water-soluble inorganic ions was 144.6±45.2 μg·m^-3. Concentrations of K, Fe, Na, Zn, Ca, Al, Mg and Pb were high, which accounted for 5% of all the elements. The enrichment factor of Cr, Ni, Pb, Mn and other elements is greater than 10 during sampling, and that of the elements such as Zn, Cu, As and Mo exceeds 100.

关 键 词：大气颗粒物 水溶性无机离子 无机元素 北京 

分 类 号：X513[环境科学与工程—环境工程]