乌鲁木齐市可吸入颗粒物水溶性离子特征及来源解析

采暖期时在乌鲁木齐市采集了环境空气中的可吸入颗粒物,对可吸入颗粒物质量浓度及8种水溶性离子的特征和来源进行了分析。结果表明,细粒子和粗粒子的月平均质量浓度分别是53.5～233.3μg/m3和38.9～60.9μg/m3;细粒子和粗粒子中水溶性离子主要由SO24-、NH4+和NO3-组成;粗粒子中NH4+与NO3-和SO24-的相关性分别是0.70和0.66,细粒子中NH4+与NO3-和SO24-的相关性分别是0.89和0.93,铵盐是乌鲁木齐可吸入颗粒物主要存在形式;煤烟尘是乌鲁木齐市采暖期可吸入颗粒物的主要来源。

Characterization and Source Contributions of Water-Soluble Ionic Components of Inhabitable Atmospheric Particles in Urumqi

Inhabitable particles samples were collected in Urumqi from September 2008 to April 2009 and mass concentration of particle matters and the concentration of eight kinds of water-soluble ions(SO2-4,NO-3,Cl-,NH+4,K+,Na+,Ca2+and Mg2+) were analyzed.Results indicated that,mass concentration of fine(PM2.5) and coarse(PM2.5-10) particulate ranged from 53.5μg/m3 to 233.3μg/m3 and from 38.9μg/m3 to 60.9μg/m3.The main component of water soluble ions of Urumqi in heating pried was SO2-4,NH+4 and NO-3 ions.The correlation coefficient of total water soluble ions of fine and coarse particulate indicated that correlation coefficient between NH+4,and NO-3,SO2-4 were good 0.89,0.93 and 0.70,0.66 respectively,ammonium was the main frame of salts in inhabitable particles of Urumqi.It indicated that the influence of coal combustion dust was the main source of inhabitable particles of Urumqi in winter heating pried.