| 辽宁典型城市道路扬尘PM2.5中水溶性无机离子组分特征及来源解析 |
| 摘要点击 2656 全文点击 860 投稿时间：2017-04-18 修订日期：2017-06-14 |
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| 中文关键词 辽宁省 道路扬尘 PM2.5 水溶性无机离子 来源解析 |
| 英文关键词 Liaoning Province road dust PM2.5 water-soluble inorganic ions source apportionment |
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| 中文摘要 |
| 为了解辽宁省典型城市道路扬尘PM2.5中水溶性无机离子组分特征及其来源，分别于2014年和2016年采集了鞍山市和盘锦市道路扬尘样品，利用再悬浮采样器将其悬浮到滤膜上，用离子色谱仪分析了其中的水溶性无机离子组分，分别用相关分析法和比值法分析了其污染特征，用主成分法初步解析了其主要污染源.结果表明，盘锦市和鞍山市8种水溶性无机离子分别占道路扬尘PM2.5的5.83%±3.34%和5.84%±1.15%.盘锦市NH4+与SO42-和NO3-的结合方式主要为（NH4）2SO4和NH4NO3，鞍山市NH4+与SO42-和NO3-的主要结合方式为NH4HSO4和NH4NO3.盘锦市和鞍山市道路扬尘PM2.5中NO3-/SO42-的均值分别为0.52±0.55和0.46±0.13，表明固定源（燃煤）对其道路扬尘PM2.5的影响较显著.盘锦市道路扬尘PM2.5主要来源于生物质燃烧源、海盐粒子、建筑水泥尘和机动车尾气；鞍山市道路扬尘PM2.5主要来源于燃煤源、生物质燃烧源、海盐粒子和钢铁冶炼尘. |
| 英文摘要 |
| In order to collect comprehensive information on the characteristics and sources of water-soluble inorganic ions in road dust (RD) PM2.5 in Liaoning Province, samples of road dust were collected in 2014 and 2016 in Anshan and Panjin and then re-suspended on filters using an NK-ZXF sampler. The concentrations of the major water-soluble inorganic ions were analyzed by ion chromatography. A correlation analysis, ratios, and a principal component analysis were used to analyze the sources of RD. The results showed that the total water-soluble inorganic ions in Panjin and Anshan accounted for 5.83%±3.34% and 5.84%±1.15% in RD PM2.5, respectively. NH4+, SO42-, and NO3- in RD PM2.5 coexisted in the forms of (NH4)2SO4, and NH4NO3 in Panjin, and NH4HSO4 and NH4NO3 in Anshan. The average values of NO3-/SO42- were 0.52±0.55 and 0.46±0.13 for Panjin and Anshan, respectively, indicating that the effects of stationary sources (e.g., coal combustion) on PM2.5 were more significant. The main sources of RD PM2.5 in Panjin were biomass burning, sea salt particles, construction dust, and mobile sources, while the main sources of RD PM2.5 in Anshan were coal combustion, biomass burning, sea salt particles, and steel smelting dust. |
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