Identifying calcium-containing mineral species in the JEB Tailings Management Facility at McClean Lake,Saskatchewan |
| |
| Institution: | 1. Department of Chemistry, University of Saskatchewan, Saskatoon, SK, S7N 5C9, Canada;2. AREVA Resources Canada, Saskatoon, SK, S7K 3X5, Canada;1. Department of Landscape Architecture, Planning and Management, Swedish University of Agricultural Sciences, Sweden;2. Department of Landscape Architecture and Spatial Planning, Norwegian University of Life Sciences, Norway;3. Department of Work Science, Business Economics and Environmental Psychology, Swedish University of Agricultural Sciences, Sweden;1. Division of Environmental Studies & Geology, Alfred University, Alfred, NY 14802, United States;2. Department of Computer Sciences, University of Wisconsin-Madison, 1210 West Dayton St., Madison, WI 53706, United States;3. Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, 1630 Linden Dr., Madison, WI 53706, United States;1. Dept. Hortofructicultura, Botànica i Jardineria, Agrotecnio, ETSEA, Universitat de Lleida, Avda. Rovira Roure 191, Lleida E-25198, Spain;2. Arborètum-Jardí Botànic de Lleida, Parc Científic i Tecnològic Agroalimentari de Lleida, Enric Farreny, 49, Lleida E-25198, Spain;1. School of Chemistry, The University of Sydney, NSW 2006, Australia;2. Australian Synchrotron, Clayton, Victoria 3168, Australia;3. Institute of Materials Structure Science, KEK, Tsukuba, Ibaraki 305-0801, Japan;4. Department of Pathology and Bosch Institute, The University of Sydney, Camperdown, NSW 2006, Australia |
| |
| Abstract: | The JEB Tailings Management Facility (TMF) is central to reducing the environmental impact of the McClean Lake uranium mill facility that is operated by AREVA Resources Canada. This facility has been designed around the idea that elements of concern (e.g., U, As, Ni, Se, Mo) will be controlled through equilibrium with precipitants. Confirming the presence of calcium-containing carbonates in the JEB TMF is the first step in determining if gypsum (CaSO4·2H2O) controls the concentration of HCO3? (aq), limiting the formation of soluble uranyl bicarbonate complexes. A combination of X-ray diffraction (XRD), X-ray absorption near-edge spectroscopy (XANES), and microprobe X-ray fluorescence (XRF) mapping was used to analyze a series of tailings samples from the JEB TMF. Calcium carbonate in the form of calcite (CaCO3), aragonite (CaCO3), and dolomite (CaMg(CO3)2) were identified by analysing Ca K-edge μ-XANES spectra coupled with microprobe XRF mapping. This is the first observation of these phases in the JEB TMF. The combination of μ-XANES and XRF mapping provided a greater sensitivity to low concentration calcium species compared to the other techniques used, which were only sensitive to the major species present (e.g., gypsum). |
| |
| Keywords: | Uranium mining Calcium Tailings Synchrotron radiation X-ray absorption spectroscopy X-ray microprobe |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
