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A first approach to mercury speciation in almad n mining district by XANES techniques

机译：XANES技术中Almad N矿区汞形态的第一种方法

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Mobility and bioavailability of mercury in mining areas is strongly dependent on its chemical speciation and spatial distribution at regional scale. In order to assess both key issues, synchrotron-based X-ray absorption near edge spectroscopy (XANES) techniques were applied to samples of untreated mineral, soils and sediments from the Almad n mining district, located in SW Spain. Results indicate that sulfide phases of mercury are the predominant species in ore dumps, whereas non-sulfide species are most common in soils and sediments of Valdeazogues River. Cinnabar is predominant in unroasted minerals, while metacinnabar is an important Hg-phase in soils from abandoned metallurgical plants of the district. On the other hand, schuetteite is conspicuously present in samples from the San Quintin and Almadenejos area. The formation of schuetteite is strongly related to the presence of metallic mercury in the ore dump, the former typically appearing at the sunlight exposed side of the rock surface.
机译：采矿区中汞的流动性和生物利用度强烈依赖于其在区域规模的化学品质和空间分布。为了评估关键问题，将边缘光谱（XANES）技术附近的基于同步的基于Synchrootron的X射线吸收对位于SW西班牙的Almad N矿区的未处理矿物，土壤和沉积物的样本。结果表明，汞的硫化阶段是矿石倾卸中的主要物种，而非硫化物物种在瓦尔德省河河的土壤和沉积物中最常见。 Cinnabar在未经污染的矿物质中占主导地位，而MetaCinnabar是该地区废弃冶金植物的土壤中的重要HG阶段。另一方面，舒德蒂斯在San Quintin和Almadenejos地区的样本中显着存在。舒塞岩的形成与矿石中金属汞的存在强烈相关，前者通常出现在岩石表面的阳光暴露侧。

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