忻州市PM_(2.5)与PM_(10)中水溶性离子季节污染特征及来源分析  

Seasonal Distribution and Source Analysis of Water-soluble Inorganic Ions in PM_(2.5) and PM_(10) of Xinzhou City

作　　者：刘江海[1] 褚彦辛 赵雪艳[1] 杨文[1] 邢延峰 白志鹏[1] 王歆华[1] 

机构地区：[1]中国环境科学研究院环境基准与风险评估国家重点实验室,北京100012 [2]忻州市环境保护研究所,山西忻州034000 [3]黑龙江省环境监测中心站,黑龙江哈尔滨150056

出　　处：《南开大学学报（自然科学版）》2015年第4期103-111,共9页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：环保公益性行业科研专项(201309010);忻州市环保局项目(20130520)

摘　　要：为了解忻州市大气气溶胶中水溶性离子的特征及来源,分别在非采暖季、采暖季和风沙季对忻州市3个固定采样点大气中PM2.5和PM10样品中的水溶性无机离子浓度进行了定量分析.结果表明,忻州市大气PM2.5和PM10浓度分别为89.97、180.12μg/m3,颗粒物中SO2-4、NO-3、NH+4及Ca2+是其主要离子,其质量浓度总和分别占PM2.5和PM10总质量浓度的24.19%和24.15%.SO2-4、NH+4、Cl-、K+主要分布在细颗粒物中,Ca2+、Mg2+主要集中在粗颗粒物中,Na+与NO-3在粗细颗粒物中比例差别不大;风沙季中Ca2+、Mg2+的百分比大于采暖季与非采暖季,采暖季里Cl-的比例大于其余2季.主成分分析表明,忻州市风沙季中颗粒物水溶性离子的最主要来源是风沙扬尘;采暖季PM2.5中离子的最主要来源是燃煤和二次生成;非采暖季PM2.5中水溶性离子的最主要来源为二次生成.To collect comprehensive information on the characteristics and sources of water-soluble inor- ganic ions in the atmospheric aerosol in Xinzhou, samples of PMz.s and PM10 were analyzed in three different fixed stations of non-heating season, heating season and windy season, respectively. The results showed that the concentration of PMz.s and PMa0 were 89.97,180. 12 μg/m3 respectively. SO2-4、NO-3、NH＋4andCa2＋ were the main ions, SOz,NH＋ ,C1-,K＋ were mainly distributed in the fine particles and Caz＋ ,Mgz＋ were mainly distributed in the inhalable particles, the proportion of Na＋ and NO3- in PMz.5 and PM10 were not remarkable, the proportion of Ca2＋ ,Mg2＋ is higher in dust seasons than those of the other two seasons and C1- is higher in heating season than that of other seasons. The principal component analysis showed that the main source of watersoluble ions in particulate matter is wind dust, second source, coal combustion and motor vehicle in dust season, heating season and non-heating season, respectively.

关 键 词：忻州市 水溶性无机离子 季节变化 来源分析 

分 类 号：X513[环境科学与工程—环境工程]