引用本文:
傅致严, 罗达通, 刘湛, 张青梅, 杨麒. 郴州市大气细颗粒物中水溶性离子的污染特征及来源分析[J]. 环境化学, 2018, 37(12): 2774-2783
FU Zhiyan, LUO Datong, LIU Zhan, ZHANG Qingmei, YANG Qi. Analysis on characteristics and sources of water-soluble ionic pollution in atmospheric fine particles in Chenzhou City[J]. Environmental Chemistry, 2018, 37(12): 2774-2783

郴州市大气细颗粒物中水溶性离子的污染特征及来源分析
傅致严1,2, 罗达通1, 刘湛1, 张青梅1, 杨麒2
1. 湖南省环境保护科学研究院, 长沙, 410004;
2. 湖南大学环境科学与工程学院, 长沙, 410082
摘要:
为全面了解南方典型工业城市郴州市的大气细颗粒物(PM2.5)中水溶性离子污染特征及其来源,本研究利用离子色谱对从2016年4月到2017年1月间郴州市6个采样点的PM2.5样品中的9种水溶性离子(SO42-、NH4+、NO3-、Ca2+、Cl-、Na+、K+、F-、Mg2+)进行分析.研究表明:郴州市的PM2.5浓度范围为23.3-66.5 μg·m-3,呈现秋冬高,春夏低的特点.研究区域的水溶性离子质量浓度的变化趋势与PM2.5变化趋势相类似;NO3-、SO42-、NH4+和K+与PM2.5相关性较好,其中SNA(SO42-、NH4+、NO3-)占PM2.5的比重最高,为18.9%-40.2%.SNA三角图解表明NH4+的主要存在形式为(NH42SO4,AE/CE均小于1,因此研究区域的PM2.5呈碱性.通过主成分分析可知研究区域的水溶性离子污染来源主要为燃煤、交通、生物质燃烧等燃烧综合源,[NO3-]/[SO42-]证明该区域的大气污染属于煤烟型污染.
关键词:    PM2.5    水溶性离子    污染特征    来源    郴州市   
Analysis on characteristics and sources of water-soluble ionic pollution in atmospheric fine particles in Chenzhou City
FU Zhiyan1,2, LUO Datong1, LIU Zhan1, ZHANG Qingmei1, YANG Qi2
1. Hunan Provincial Academy of Environmental Protection Sciences, Changsha, 410004, China;
2. College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China
Abstract:
In order to fully understand the characteristics and sources of water-soluble ions in atmospheric fine particles (PM2.5) in Chenzhou, a typical industrial city in southern China, 9 water-soluble ions (SO42-、NH4+、NO3-、Ca2+、Cl-、Na+、K+、F-、Mg2+)in PM2.5 samples collected from 6 sampling sites during April 2016 to January 2017 were analyzed by ion chromatography. The results showed that the concentration of PM2.5 in Chenzhou was in the range of 23.30-66.46 μg·m-3, higher in autumn and winter and lower in spring and summer. The change of water-soluble ion concentration was similar to PM2.5. The correlation between NO3-、SO42-、NH4+ and K+ with PM2.5 was high. SNA(SO42-、NH4+、NO3-) were the main water-soluble ions in PM2.5, and their proportion reached 18.9% to 40.2%. The SNA triangle diagram showed that NH4+ was mostly in the form of (NH4)2SO4, and AE/CE values were all less than 1, indicating that PM2.5 in Chenzhou was alkaline. According to the principal component analysis, water-soluble ions were mainly from the coal combustion, transportation, biomass combustion and other comprehensive combustion sources. The[NO3-]/[SO42-] confirmed that the air pollution in Chenzhou belonged to soot-type pollution.
Key words:    PM2.5    water-soluble ions    source    pollution characteristics    Chenzhou   
收稿日期: 2018-05-03
基金项目: 国家环境保护公益性行业科研专项(20150919)资助.
刘湛,Tel:13787013036,E-mail:liuzhanbh@126.com
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