基于样方法的天津市春季道路扬尘PM_(2.5)中水溶性离子特征及来源解析  

Characteristics and Source Apportionment of Water-soluble Inorganic Ions in Road Dust PM_(2.5) During Spring in Tianjin Using the Quadrat Sampling Method

作　　者：赵静琦 姬亚芹[1] 张蕾[1] 王士宝[1] 李越洋 ZHAO Jing-qi, JI Ya-qin , ZHANG Lei, WANG Shi-bao, LI Yue-yang(College of Environmental Science and Engineering, Nankai University, Tianjin 300350, Chin)

机构地区：[1]南开大学环境科学与工程学院,天津300350

出　　处：《环境科学》2018年第5期1994-1999,共6页Environmental Science

基　　金：环境保护公益性行业科研专项(201409004);大气重污染成因与治理攻关项目(DQGG0201)

摘　　要：为研究天津市道路扬尘PM_(2.5)中水溶性无机离子组分特征及其来源,于2015年4月采集天津市道路扬尘样品,利用再悬浮采样器将采集的样品悬浮到滤膜上,用离子色谱仪分析其水溶性无机离子组分,利用相关分析和比值分析及主成分法对其污染特征和来源进行探讨.结果表明,天津市8种水溶性无机离子占道路扬尘PM_(2.5)的6.13%±2.32%;不同道路类型道路扬尘PM_(2.5)中水溶性无机离子总量差异较大.相关性分析表明Na^+、K^+、Mg^(2+)和Ca^(2+)这4种离子同源性较高.NO_3^-/SO_4^(2-)比值显示固定源对天津市春季道路扬尘PM_(2.5)的影响更为显著.通过主成分分析法可知,天津市春季道路扬尘PM_(2.5)主要来源于燃煤源、移动源、生物质燃烧源和建筑施工扬尘.In order to collect comprehensive information regarding the characteristics and sources of the water-soluble inorganic ions in road dust（ RD） PM2.5 in Tianjin,samples of road dust were collected in April 2015 in Tianjin,and then re-suspended on filters using a NK-ZXF sampler. The concentrations of the major water-soluble inorganic ions were analyzed by ion chromatography. A correlation analysis,ratio method,and principal component analysis were used to analyze the sources of RD PM（2.5）. The results showed that the total water-soluble inorganic ion concentration in Tianjin accounted for 6. 13% ± 2. 32%,varying with different road types. Na~＋,K~＋,Mg^（2＋）,and Ca^（2＋） showed high homology. NO3^-/SO4^（2-） revealed that the main source of PM（2.5） was mostly attributed to fixed sources. The principal component analysis showed that the main sources of RD PM（2.5） in Tianjin were coal combustion,mobile sources,biomass burning,and construction dust.

关 键 词：天津市 道路扬尘 PM2.5 水溶性无机离子 来源解析 

分 类 号：X513[环境科学与工程—环境工程]