中文关键词天津市道路扬尘PM_2.5水溶性无机离子来源解析 英文关键词Tianjinroad dustPM_2.5water-soluble inorganic ionssource apportionment

作者	单位	E-mail
赵静琦	南开大学环境科学与工程学院, 天津 300350	1442073606@qq.com
姬亚芹	南开大学环境科学与工程学院, 天津 300350	jiyaqin@nankai.edu.cn
张蕾	南开大学环境科学与工程学院, 天津 300350
王士宝	南开大学环境科学与工程学院, 天津 300350
李越洋	南开大学环境科学与工程学院, 天津 300350

中文摘要 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⁺、Mg²⁺和Ca²⁺这4种离子同源性较高.NO₃^-/SO₄^2-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. 英文摘要 In order to collect comprehensive information regarding the characteristics and sources of the water-soluble inorganic ions in road dust (RD) PM_2.5 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⁺, Mg²⁺, and Ca²⁺ 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.

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