石家庄市春季PM_(10)和PM_(2.5)浓度及其水溶性离子组分特征分析

对2013年春季石家庄市PM10和PM2.5中水溶性离子进行分析,石家庄市春季PM10平均质量浓度为354.9μg/m3,总水溶性无机离子质量浓度为105.48μg/m3,其中SO2-4,NH+4,Ca2+,Cl-和NO-3是主要的水溶性无机离子,占总离子质量分数依次为40.89%,17.93%,13.49%,10.75%和9.09%,共计92.15%;PM2.5平均质量浓度为174.4μg/m3,总水溶性无机离子质量浓度为86.45μg/m3,与PM10中一样,SO2-4,NH+4,Cl-,NO-3和Ca2+是主要的水溶性无机离子,占总离子质量分数依次为41.06%,24.25%,12.11%,8.34%和5.32%,共计91.08%。石家庄市春季PM10及PM2.5中NO-3/SO2-4比值分别约为0.22和0.20,由此判断石家庄市春季主要污染以固定源为主,以燃煤及工业生产为主要来源。

Analysis of mass concentration and water soluble ionic components characteristics of PM10 and PM2.5 in spring in Shijiazhuang City

Water soluble ions of PM10 and PM2.5in the spring of 2013 in Shijiazhuang are analyzed.The average mass concentration of PM10 is 354.9μg/m3,and total water soluble inorganic ion mass concentration is 105.48μg/m3,wherein SO2-4,NH+4,Ca2+,Cl-and NO-3are the most important water soluble inorganic ion.Their ion mass concentrations are 40.89%,17.93%,13.49%,10.75%,9.09%,respectively,and their total ion concentration is 92.15%.The average mass concentration of PM2.5is 174.4μg/m3,total water soluble inorganic ion mass concentration is 86.45μg/m3,the same to PM10,SO2-4,NH+4,Cl-,NO-3and Ca2+are the most important water soluble inorganic ions,the ion mass fractions are 41.06%,24.25%,12.11%,8.34%,5.32%,respectively,and their total mass concentration is 91.08%.NO-3/SO2-4of PM10 and PM2.5in spring in Shijiazhuang are 0.22 and 0.20,respectively,showing that in Shijiazhuang in spring the major pollution is from fixed source.Fire coal and industrial production are the main sources.