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| 成都市一次重雾霾天气PM10中水溶性离子污染特征 |
| Characteristics of Water-soluble Ionic in PM10 under One Serious Haze Weather from Chengdu City, China |
| 投稿时间：2015-07-16 修订日期：2015-09-06 |
| DOI：10.14050/j.cnki.1672-9250.2016.02.011 |
| 中文关键词: 成都市;PM10;水溶性离子;大气污染;雾霾 |
| 英文关键词: Chengdu City;PM10;water-soluble ion;air pollution;haze |
| 基金项目:国家自然科学基金项目(41265008);贵州省环境保护厅环境科技项目(黔环科[2011]6号) |
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| 中文摘要: |
| 2015年1月10~19日,对成都市青羊区雾霾期间大气PM10样品进行了采集,分析其质量浓度和9种水溶性离子(F-、Cl-、NO3-、SO42-、NH4+、Ca2+、Mg2+、K+和Na+)的分布特征。结果表明:此次雾霾期间PM10的平均质量浓度高达357.8 μg/m3;水溶性离子的总质量浓度在雾霾天较高,二次无机水溶性离子NO3-、SO42-和NH4+占总水溶性离子的74.53%以上;雾霾和非雾霾天PM10中水溶性离子的质量浓度、含量百分比和各离子比值体现了本次雾霾是由机动车尾气、燃煤、建筑施工和气象等因素造成;PM10中NO3-/SO42-的比值范围0.755 1~1.410,均值为1.050,说明成都是燃煤和机动车并存的复合型污染;PM10中NH4+和NO3-、SO42-两两之间均具有较好的相关性,NH4+和NO3-、SO42-的相关性系数分别为0.845 0、0.966 0,NH4+和NO3-、SO42-主要以(NH4)2 SO4、NH4 NO3形式存在于PM10中,Ca2+和Mg2+的相关性系数高达0.913 0。 |
| 英文摘要: |
| Atmospheric PM10 samples were collected in Qingyang District of Chengdu City, China under the weather of one serious haze in January 10-19, 2015. Mass concentrations and components of 9 water-soluble ions(Cl-, F-, NO3-, SO42-, NH4+, Mg2+, Ca2+, Na+, and K+)in PM10 were analyzed. Results indicate that the average concentration of PM10 in the haze days reaches 357.8 μg/m3; total concentrations of water-soluble ions in the haze days are higher than those of normal days; secondary inorganic ions(NO3-, SO42-, and NH4+) account for over 74.53% of the total water soluble ions. Mass concentrations, mass fractions and ion ratios of the water-soluble ions in haze and normal days reflect that the haze is caused by motor vehicle emissions, coal combustion, building operations and meteorological factors. Ratios of NO3-/SO42- in PM10 range from 0.755 0 and 0.966 0, respectively. The NH4+, NO3- and SO42- mainly exist as(NH4)2 SO4 and NH4 NO3 in PM10, and the correlation coefficient between Ca2+ and Mg2+ is 0.913 0. |
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