Role of secondary minerals in the acid generating potential of weathered mine tailings: Crystal-chemistry characterization and closed mine site management involvement
| العنوان: | Role of secondary minerals in the acid generating potential of weathered mine tailings: Crystal-chemistry characterization and closed mine site management involvement |
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| المؤلفون: | Hassan Bouzahzah, James J. Dynes, Mustapha Abdelmoula, Mostafa Benzaazoua, Abdellatif Elghali, Heather E. Jamieson |
| المساهمون: | Université du Québec en Abitibi-Témiscamingue (UQAT), Mohammed VI Polytechnic University [Marocco] (UM6P), Laboratoire de Chimie Physique et Microbiologie pour les Matériaux et l'Environnement (LCPME), Institut de Chimie du CNRS (INC)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Canadian Light Source, University of Saskatchewan [Saskatoon] (U of S), Queen's University [Kingston, Canada] |
| المصدر: | Science of the Total Environment Science of the Total Environment, Elsevier, 2021, 784, pp.147105. ⟨10.1016/j.scitotenv.2021.147105⟩ |
| بيانات النشر: | HAL CCSD, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | chemistry.chemical_classification, Environmental Engineering, Mineral, Gypsum, 010504 meteorology & atmospheric sciences, Sulfide, Weathering, 010501 environmental sciences, engineering.material, Acid mine drainage, 01 natural sciences, Pollution, Tailings, chemistry.chemical_compound, chemistry, Environmental chemistry, [SDE]Environmental Sciences, engineering, Environmental Chemistry, Carbonate, Waste Management and Disposal, Dissolution, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences |
| الوصف: | Mine tailings exposed to water and oxygen generate acid mine drainage (AMD) when the neutralizing minerals are insufficient to buffer the acid produced by sulfide oxidation. Mineral reactivity, such as sulfide oxidation and carbonate dissolution, leads to several changes within mine tailings in terms of their physical, mineralogical, and geochemical properties, which may lead to the release of metal(oid)s (e.g., As, Cu, Zn, Fe, S) into the environment. Fresh and oxidized tailings were sampled at two vertical profiles in a tailings storage facility (TSF). The TSF contains tailings from gold ore processing at a mine that has been closed for more than 25 years. Oxidized tailings have formed by in-situ oxidation of fresh tailings over more than 20 years. The collected samples were analyzed for: i) chemical composition by inductively coupled plasma atomic emission spectroscopy (ICP-AES), X-ray fluorescence (XRF), and total S/C; and ii) mineralogical composition by X-ray diffraction (XRD), Mineral Liberation Analyzer (MLA), Mossbauer spectroscopy, and Fe L-edge X-ray absorption near-edge spectroscopy (XANES). Mineralogically, the fresh tailings included more than 22 wt% carbonates and more than 10 wt% sulfides. In contrast, the oxidized tailings were composed mainly of secondary minerals such as iron oxy-hydroxides and gypsum. Geochemically, the fresh tailings exhibited a circumneutral behavior during weathering cell experiments and contaminants such as As were negligibly released ( |
| اللغة: | English |
| تدمد: | 0048-9697 1879-1026 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::47f4e46855d3172690c3d77751b8701d https://hal-cnrs.archives-ouvertes.fr/hal-03247005 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi.dedup.....47f4e46855d3172690c3d77751b8701d |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 00489697 18791026 |
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