| 天山乌鲁木齐河源1号冰川区气溶胶水溶性离子变化特征及来源分析 |
| 摘要点击 2321 全文点击 936 投稿时间：2012-12-20 修订日期：2013-05-20 |
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| 中文关键词 1号冰川 气溶胶 水溶性离子 特征 来源 |
| 英文关键词 Urumqi Glacier No. 1 aerosols chemistry soluble ions characteristics sources |
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| 中文摘要 |
| 基于2007年4、8和10月这3个时段不同季节的野外考察取样和实验室分析测试,探讨了天山乌鲁木齐河源1号冰川区气溶胶样品中水溶性离子成分的浓度组成、变化特征及其可能来源. 结果表明,气溶胶水溶性离子平均浓度为2.76 μg·m-3,化学组成以Ca2+、NO3-和SO42-为主. Ca2+、SO42-、NH4+、Na+、Mg2+、Cl-在春、夏、秋这3个季节的变化趋势与总离子浓度的变化趋势一致,均为夏季最高、秋季次之、春季最低,而K+与NO3-却呈现出秋季最高、夏季和春季浓度次之的季节变化特征. 分析认为,气溶胶中Ca2+、Na+、Mg2+、K+和Cl-主要可能来自陆源矿物; 而NO3-和NH4+则很大程度上以人为源为主. 并且发现,SO42-可能同时受陆地源与人类活动来源的影响. |
| 英文摘要 |
| Major soluble ions were measured in 26 aerosol samples collected at Glacier NO. 1 at the headwater of Urumqi River in Tianshan Mountains in April, August and October 2007. The concentration, seasonal change and source of aerosol were analyzed. The results showed that the mean concentration of total soluble major ions of aerosol was 2.76 μg·m-3, Ca2+, NO3- and SO42- were the major soluble inorganic ion components. In spring, summer and autumn, the seasonal change of the mean concentration of total soluble inorganic ions was consistent with Ca2+, SO42-, NH4+, Na+, Mg2+ and Cl-, the highest concentration was in summer, followed by autumn and spring. While the maximum concentration of K+and NO3- was observed in autumn, the minimum was in spring. Soluble inorganic ion source characteristics were that: Ca2+, Na+, Mg2+, K+ and Cl- were mostly the land source; NO3- and NH4+ were mainly from the anthropogenic source. SO42- was mainly originated from both crustal surface and anthropogenic sources. |
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