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长株潭近地表大气尘矿物特征及环境指示意义
Mineralogical Characteristics of Atmospheric Dust and Their Environmental Significance in the ChangshaZhuzhou-Xiangtan Region
【摘要】 通过X射线粉末衍射(XRD)、扫描电镜/能谱(SEM/EDX)方法对长沙、株洲和湘潭(以下简称长株潭)地区近地表大气尘中矿物成份进行分析研究,结果显示大气尘中含有石英、石膏、方解石、白云石、硫酸镉等23种自然矿物,还含有SiS2、Cadmium Arsenide(Cd3As2)、RhZn、Cr2Nb、NiTi、HfMo2等14种非自然矿物;近地表大气尘矿物形貌特征显示Cd元素主要富集在有矿物颗粒的地方,且呈近浸染状分布,能谱半定量分析,Cd含量可达4%,表明Cd易被吸附在矿物表面。分析长株潭地区大气尘中矿物成份、空间分布特征及其来源,对长株潭城市一体化具有及其重要的环境指导意义。
【Abstract】 Study of XRD and SEM/EDX indicates that atmospheric dust in the Changsha-ZhuzhouXiangtan region contains 23 natural minerals such as quartz,gypsum,calcite,dolomite,cadmium sulfate and so on as well as 14 synthetic crystals such as SiS2,Cadmium Arsenide(Cd3As2),RhZn,Cr2Nb,NiTi,HfMo2.Element Cd with a content of up to 4% is mainly adsorbed on above-mentioned minerals.
【关键词】 大气尘;
环境指示;
X—射线衍射;
长株潭地区;
【Key words】 Changsha-Zhuzhou-Xiangtan; atmospheric dust; environmental indicator; mineralogical characteristic; X-ray diffraction;
【Key words】 Changsha-Zhuzhou-Xiangtan; atmospheric dust; environmental indicator; mineralogical characteristic; X-ray diffraction;
- 【文献出处】 四川地质学报 ,Acta Geologica Sichuan , 编辑部邮箱 ,2013年02期
- 【分类号】X831
- 【下载频次】58