| 沙尘暴期间上海市大气颗粒物元素地球化学特征及其物源示踪意义 |
| 摘要点击 3052 全文点击 1282 投稿时间：2012-08-10 修订日期：2012-10-15 |
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| 中文关键词 地球化学特征 沙尘暴 大气颗粒物 物源示踪 上海 |
| 英文关键词 geochemical characteristics dust storm atmospheric particulate matter material source Shanghai |
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| 中文摘要 |
| 采集了2009年10月~2010年10月上海市普陀、闵行、青浦这3个区的大气颗粒物(包括沙尘暴期间),并在南通、郑州、西安、北京等沙尘暴输沙沿途城市追踪采集春季大气颗粒物样品,运用XRF及ICP-MS分别测试了样品的主量及稀土元素含量. 闵行、普陀、青浦区这3个区的大气颗粒物的化学组成非常相似,表明样品物源相似. 将主量元素数据UCC标准化显示,沙尘暴样品主量元素含量较非沙尘暴样品更接近于黄土,可能主要来源于西北内陆地区,部分为局地源物质. 北方各城市沙尘暴样品的稀土元素配分模式一致,且与黄土相似,说明沙尘暴样品物质来源与黄土接近,以壳源物质为主,说明非沙尘暴样品与沙尘暴样品和黄土物质来源不同,有非壳源物质的混合. |
| 英文摘要 |
| Atmospheric particulates were sampled from three sampling sites of Putuo, Minhang and Qingpu Districts in Shanghai between Oct. , 2009 and Oct. , 2010.In addition, particulate samples were also collected from Nantong, Zhengzhou, Xi'an, and Beijing city where dust storm dust transported along during spring. Element compositions of atmospheric particulates were determined by XRF and ICP-MS. The concentrations of major and trace elements in atmospheric particulates from Putuo, Minhang and Qingpu Districts were similar, indicating their common source. The UCC standardization distribution map showed that the major element composition of dust storm samples was similar to that of loess in northwestern China, indicating that the dust storm dust was mainly derived from Western desert and partly from local area. The REE partition patterns of dust storm dusts among different cities along dust transport route were similar to each other, as well as to those of northern loess, which indicates that the dust storm samples may have the same material source as loess, which mainly comes from crust material. However, the REE partition patterns of non-dust storm particulates were different among the studied cities, and different from those of loess, which suggests that the non-dust storm samples may be mixed with non-crust source material, which is different from dust storm dust and loess. The major element composition and REE partition pattern are effective indicators for source tracing of dust storm dust. |
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