| 拉萨市夏季大气降尘单颗粒矿物组成及其形貌特征 |
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| 引用本文： | 张学磊,邬光剑,岳雅慧,张成龙.拉萨市夏季大气降尘单颗粒矿物组成及其形貌特征[J].岩石矿物学杂志,2011,30(1):127-134. |
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| 作者姓名： | 张学磊 邬光剑 岳雅慧 张成龙 |
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| 作者单位： | 1. 中国科学院青藏高原研究所环境变化与地表过程重点实验室,北京,100085
2. 中国科学院青藏高原研究所大陆碰撞与高原隆升重点实验室,北京,100085 |
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| 基金项目： | 国家自然科学基金，中国科学院知识创新工程重要方向项目 |
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| 摘 要： | 应用带能谱的电子扫描电镜(SEM-EDX)对拉萨市夏季正常天气下收集的大气自然沉降气溶胶样品进行分析,研究了拉萨市大气降尘矿物组成和各种物相形貌特征信息。拉萨市大气颗粒物含有硅酸盐颗粒、富钙颗粒、富铁颗粒、富碳颗粒(燃煤飞灰颗粒和燃油飞灰颗粒)和植物残体颗粒。根据颗粒物数量统计发现拉萨市大气颗粒物以硅酸盐颗粒为主,富钙颗粒和富铁颗粒次之,需要指出的是以燃油飞灰为主的富碳颗粒已占到一定比重,说明以燃油为主的机动车尾气对拉萨大气污染在加强。研究结果表明,大气降尘矿物成分及其形貌特征可以用作判定污染物来源的重要标志,拉萨大气中颗粒来源的多样性决定了治理措施也应综合进行。
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| 关 键 词： | 扫描电镜与能谱仪联用(SEM-EDX) 大气降尘 单颗粒分析 矿物组成 颗粒来源 |
Mineral composition and morphology of individual dust fall particulates over Lhasa in summer |
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| ZHANG Xue_lei,WU Guang_jian,YUE Ya_hui and ZHANG Cheng_long.Mineral composition and morphology of individual dust fall particulates over Lhasa in summer[J].Acta Petrologica Et Mineralogica,2011,30(1):127-134. |
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| Authors: | ZHANG Xue_lei WU Guang_jian YUE Ya_hui and ZHANG Cheng_long |
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| Institution: | ZHANG Xue-lei1,WU Guang-jian1,YUE Ya-hui2 and ZHANG Cheng-long1(1.Key Laboratory of Tibetan Environment Changes and Land Surface Processes,CAS,Beijing 100085,China,2.Key Laboratory of Continental Collision and Plateau Uplift,China) |
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| Abstract: | Scanning electron microscopy equipped with energy dispersive X-ray detector(SEM-EDX)was used to study the atmospheric dust fall aerosols collected in Lhasa under the regular meteorological conditions in summer.The results offer the particles size,mineral composition and mineral morphology of the atmospheric dust fall in Lhasa.Morphologic observation of SEM reveals that the dust falls are mainly composed of clay silicate particles in the irregular flaky shape and a certain amount of such anthropologic and bi... |
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| Keywords: | scanning electron microscopy equipped with energy dispersive X-ray(SEM-EDX) atmospheric dust fall individual particle analysis mineral composition particles sources |
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