A first approach to mercury speciation in almad n mining district by XANES techniques
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.
Mercury speciation synchrotron radiation XANES
J. M. Esbri A. Bernaus X. Gaona C. J. Sanchez P. Higueras M. Valiente
Departamento de Ingenieria Geologica y Minera, Escuela Universitaria Politecnica de Almaden, Univers Grup de T cniques de Separaci6 en Quimica (GTS), Departament de Quimica, Universitat Autonoma de Bar Departamento de Quimica Fisica, Facultad de Ciencias Quimicas de Ciudad Real, Universidad de Castill
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
309-310
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）