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首页> 外文期刊>Chemical geology >Application of Raman spectroscopy to identify iron minerals commonly found in mine wastes
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Application of Raman spectroscopy to identify iron minerals commonly found in mine wastes

机译：拉曼光谱法用于鉴定矿山废料中常见的铁矿物

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摘要

Raman spectroscopy can be used for the rapid identification of a wide variety of minerals ranging from common iron oxy(hydroxides), such as ferrihydrite, to rare minerals, such as adelite. This study employed Raman spectroscopy (laser power 0.1%) to characterize both synthetic and common natural iron-bearing mineral phases, including oxides (hematite, magnetite), hydroxides (ferrihydrite, goethite, lepidocrocite, akaganéite), carbonate (siderite), sulfate (Na-jarosite), and ferric arsenates (scorodite, yukonite), found in acid mine drainage and mine tailings settings. X-ray diffraction (XRD) was conducted to verify the purity of phases and compared with associated Raman analyses. Samples with arsenate adsorbed onto ferrihydrite at varied As/Fe ratios (0.50, 0.10, and 0.05) at pH ~. 10 were also evaluated. Raman spectra were compared with the literature and recommendations made regarding Raman bands that are the most diagnostic for the individual iron minerals studied. Comparison of the Raman and XRD scans shows Raman can either augment or replace XRD for mineral identification. Lastly, some important applications of Raman spectrometry for evaluating significant environmental processes are discussed.
机译：拉曼光谱法可用于快速鉴定多种矿物，从普通的三氧化二铁（氢氧化物）（如三水铁石）到稀有的矿物（如人造石）。这项研究采用拉曼光谱法（激光功率为0.1％）来表征合成的和常见的天然含铁矿物相，包括氧化物（赤铁矿，磁铁矿），氢氧化物（水铁矿，针铁矿，纤铁矿，高锰铁矿），碳酸盐（菱铁矿），硫酸盐（在酸性矿山排水系统和矿山尾矿中发现亚铁钠和砷酸铁（臭葱石，育空石）。进行X射线衍射（XRD）以验证相的纯度，并与相关的拉曼分析进行比较。在pH〜下，砷化物以不同的As / Fe比（0.50、0.10和0.05）吸附到亚铁酸盐上的样品。还评估了10个。将拉曼光谱与有关拉曼谱带的文献和建议进行了比较，这些文献对所研究的每种铁矿物质最具诊断性。拉曼和XRD扫描的比较表明，拉曼可以增强XRD或替代XRD进行矿物鉴定。最后，讨论了拉曼光谱法在评估重要环境过程中的一些重要应用。

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