| 安阳市大气PM2.5中水溶性离子季节特征及来源解析 |
| 摘要点击 3340 全文点击 1048 投稿时间：2019-07-30 修订日期：2019-08-14 |
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| 中文关键词 安阳 PM2.5 水溶性离子 存在形式 来源 |
| 英文关键词 Anyang City PM2.5 water-soluble ions existence forms source |
| 作者 | 单位 | E-mail | | 孙有昌 | 郑州大学化学与分子工程学院, 郑州 450001
郑州大学环境科学研究院, 郑州 450001 | sunyouchang@foxmail.com | | 姜楠 | 郑州大学化学与分子工程学院, 郑州 450001
郑州大学环境科学研究院, 郑州 450001 | jiangn@zzu.edu.cn | | 王申博 | 郑州大学化学与分子工程学院, 郑州 450001
郑州大学环境科学研究院, 郑州 450001 | | | 段时光 | 郑州大学化学与分子工程学院, 郑州 450001
郑州大学环境科学研究院, 郑州 450001 | | | 张瑞芹 | 郑州大学化学与分子工程学院, 郑州 450001
郑州大学环境科学研究院, 郑州 450001 | rqzhang@zzu.edu.cn |
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| 中文摘要 |
| 为探究安阳市大气PM2.5中水溶性离子的污染特征及其来源，于2018~2019年的典型月份在安阳市采集PM2.5样品，使用离子色谱测试了9种水溶性离子（Na+、NH4+、K+、Mg2+、Ca2+、F-、Cl-、NO3-和SO42-）.开展了PM2.5和水溶性离子浓度水平的分析、阴阳离子平衡和氮氧化率（NOR）、硫氧化率（SOR）的计算、离子相关性和主成分分析等.结果表明，安阳市PM2.5和水溶性离子年均浓度分别为（85.81±45.43）μg·m-3和（48.21±30.04）μg·m-3，各离子浓度高低顺序为NO3- > SO42- > NH4+ > Cl- > K+ > Ca2+ > Na+ > Mg2+ > F-；阴阳离子电荷当量数值为0.75~0.94，大气气溶胶显碱性；NH4+和SO42-、NO3-以及K+和Cl-等具有显著的相关性；氮氧化率（NOR）和硫氧化率（SOR）的年均值分别为0.25和0.37；SO42-、NO3-和NH4+（SNA）的年均浓度为（42.72±27.87）μg·m-3，占水溶性离子总量的87.14%；春季、夏季和秋季的NH4+主要以（NH4）2SO4和NH4NO3的形式存在，冬季的NH4+主要以（NH4）2SO4、NH4NO3和NH4Cl的形式存在；水溶性离子主要来自于二次生成、燃煤、生物质燃烧和扬尘. |
| 英文摘要 |
| We explore the characteristics and sources of water-soluble ions in aerosol fine particulate matter (PM2.5) samples collected from Anyang, China, during typical seasonal months from 2018 to 2019. Nine water-soluble ions (Na+, NH4+, K+, Mg2+, Ca2+, F-, Cl-, NO3-, and SO42-) were analyzed. The analysis of PM2.5, water-soluble ion concentration levels, anion-cation balance, nitrogen oxidation rate (NOR), sulfur oxidation rate (SOR), and ion correlation showed that the annual average concentrations of PM2.5 and water-soluble ions in Anyang were (85.81±45.43) μg·m-3 and (48.21±30.04) μg·m-3, respectively. Concentrations of ions were ranked as:NO3- > SO42- > NH4+ > Cl- > K+ > Ca2+ > Na+ > Mg2+ > F-. The annual average concentration of the sum of NH4+, NO3-, and SO42- was (42.72±27.87) μg·m-3, which accounted for 87.14% of total water-soluble ions. Moreover, NH4+ was highly related to SO42- and NO3-. The mean values of the nitrogen oxidation rate (NOR) and sulfur oxidation rate (SOR) were 0.25 and 0.37, respectively. These results suggest that these ions were the result of secondary formation. The anion-cation charge equivalent value was 0.75-0.94, which indicates that the sampled aerosols were alkaline. NH4+ mainly existed in the form of (NH4)2SO4 and NH4NO3 in spring, summer, and autumn, whereas in winter it mainly existed in the form of NH4Cl. The results of principal component analysis indicated that secondary aerosols, coal combustion, biomass burning, and dust were the main sources of the water-soluble ions in Anyang during the sampled periods. |
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