[ Objective] The research aimed to analyze main water-soluble inorganic ions of the atmospheric PM10 in Youjiang District of Baise City in winter and spring. [Method] From December, 2010 to April, 2011, atmospheric inhalable paniculate matter PM10 in urban district of Baise was collected to study chemical characteristics of the water-soluble inorganic ion, [ Result] Average concentration of PM10 in urban district of Baise was 163.45 μg/m3 in winter and 148. 59 μg/m3 in spring. The concentration order of water-soluble inorganic ion was SO2-4 > Cl- >NO3- >NH4+ >K+ >Na+ >Mg2+ >F-. SO2-4 , NO3- and Cl- respectively occupied 52.4%, 18.2% and 12,6%. PM10 presented strong acidity, which might be caused by high content of SO2-4. Equivalent ratio of NO3- and SO2-4 was 0. 73, showing that stationary source was important source of the atmospheric N and S pollution. Equivalent ratio of NH4+ and SO2-4 was 0.75 , showing that NH4+ existed in the form of NH4HSO4, Sea salt had very small contribution on ion source of the atmospheric participate matter. [ Conclusion] Inhalable paniculate mat-ter was one of the primary air pollutants in Baise City.%[目的]分析百色市右江区冬春季大气PM1.中主要水溶性无机离子.[方法]于2010年11月至2011年4月,采集百色市城区大气可吸入颗粒物PM10样品,研究其水溶性无机离子的化学特征.[结果]百色市城区冬季PM1.平均浓度为163.45μg/m3,春季PM1.平均浓度为148.59μg/m3,略低于冬季.水溶性无机离子浓度的大小次序为SO42- ＞Cl- ＞N03- ＞NH4+ ＞K+ ＞Na+ ＞Mg2 ＞F-,其中SO42-、NO3-和C1-分别占水溶性组分质量的52.4％、18.2％和12.6％.PM10呈较强酸性,可能是高含量的S02-所致.NO3-和SO42--的当量比值为0.73,表明固定源是大气N、S污染重要来源.NH4+和SO42-的当量比值为0.75,表明PM10中的NH4+主要以NH4HSO4形式存在.海盐对大气颗粒物中离子来源的贡献很小.[结论]可吸入颗粒物成为百色市大气首要污染物之一.
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