华北煤矿区PM2.5中水溶性离子特征及来源解析
Characteristics and Sources Analysis of Water-Soluble Ions in PM2.5 in North China Coal Mining Area
DOI: 10.12677/AG.2023.139096, PDF,   
作者: 房银祥, 常璐凡：河北工程大学地球科学与工程学院，河北 邯郸
关键词: PM2.5；水溶性离子；SNA；来源分析；PM2.5； Water-Soluble Ions； SNA； Source Analysis
摘要: 为了解华北典型矿区大气PM2.5中水溶性离子特征及其来源，本研究于2018年4月至2019年2月采集峰峰矿区大气PM2.5样品，运用离子色谱仪测定PM2.5中Na+、NH+4 、K+、Mg2+、Ca2+、F−、Cl−、SO2-4 、NO-3 的质量浓度。结果显示，观测期间PM2.5平均浓度(134.43 ± 77.07) μg•m−3，达到《环境空气质量标准》(GB 3095-2012)中二级标准限值(75 μg•m−3)的1.79倍，水溶性离子平均浓度高达(58.76 ± 39.40) μg•m−3；SOR和NOR的平均值为0.38和0.22，SO2-4 、NO-3 和 NH+4在水溶性离子中占比达85.00%，且随着污染程度加重，二次转化程度也会加大；ρ(NO-3 )/ρ( SO2-4)的均值为1.30，表明移动源对空气污染的贡献程度较大；主成分分析结果显示，观测期间水溶性离子来源包括二次转化、燃煤和生物质燃烧混合源55.88%、扬尘源29.82%；后向轨迹模式结果显示，聚类所得到4类气团，其中来自河北省内的两类气团带占比高达71.76%。
Abstract: To analyze the characteristics and sources of water-soluble ions in PM2.5 in north China coal mining area, this study collected atmospheric PM2.5 samples in Fengfeng Mining District from April 2018 to February 2019 and used ion chromatography to determine the mass concentration of nine water-soluble ions (Na+,NH+4 , K+, Mg2+, Ca2+, F−, Cl−,SO2-4 ,NO-3 ) in PM2.5. The result showed that the mean concentration of PM2.5 was (134.43 ± 77.07) ug•m−3, which was 1.79 times than the second level criterion of Environmental Air Quality Standard, and the mean concentration of water-soluble ions was up to (58.76 ± 39.40) μg•m−3; the average of SOR and NOR was 0.38 and 0.22, respectively. The proportion of SO2-4 , NO-3 and NH+4 in water-soluble ions was as high as 85.00%, and the degree of secondary transformation would also increase with worsened pollution. The average of ρ( NO-3)/ρ(SO2-4 ) was 1.30, which suggested that mobile sources contributed to air pollution significantly. The principal component analysis showed that the sources of water-soluble ions included secondary conversion, coal and biomass combustion mixed sources (55.88%), and dust sources (29.82%). The result of backward trajectory model indicated that the two air masses from Hebei province (71.76%) accounted for the highest proportion in the four types of air masses obtained by clustering.
文章引用：房银祥, 常璐凡. 华北煤矿区PM2.5中水溶性离子特征及来源解析[J]. 地球科学前沿, 2023, 13(9): 1005-1014. https://doi.org/10.12677/AG.2023.139096

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