Enviar artigo por via de e-mail Leaching ability of strategically important elements from middle-miocene coals ash of the Sergeevskoye brown coal deposit (Priamurie)
- Autores: Radomskaya V.I.1, Shumilova L.P.1, Sorokin A.P.1, Soktoev B.R.2, Ivanov V.V.3, Pavlova L.M.1
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Afiliações:
- Institute of Geology and Natural Management of Far Eastern Branch of Russian Academy of Sciences
- National Research Tomsk Polytechnic University
- Far East Geological Institute, Far East Branch, Russian Academy of Sciences
- Edição: Nº 2 (2025)
- Páginas: 75-90
- Seção: Articles
- URL: https://ogarev-online.ru/0023-1177/article/view/306247
- DOI: https://doi.org/10.31857/S0023117725020085
- EDN: https://elibrary.ru/KOKSRC
- ID: 306247
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Resumo
Using a set of analytical methods, the mineralogy and behavior of strategically valuable elements during their leaching from coal ash from the Sergeevskoye deposit were studied under different conditions of a laboratory experiment. The use of a sequential three-stage leaching scheme (water–alkali–acid) caused a significant (up to 97%) decrease in the concentration of most elements in the ash residue. It was found that the bulk of rare earth elements in the ash are present in the form of oxides that are readily soluble in acid; non-leachable rare earth elements are in the form of phosphate minerals similar in composition to monazite and xenotime. The maximum (70–100%) extraction of most strategically valuable elements occurs with a single-stage treatment of ash with concentrated hydrochloric acid (4.8 M) for an hour at 75°C.
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Sobre autores
V. Radomskaya
Institute of Geology and Natural Management of Far Eastern Branch of Russian Academy of Sciences
Autor responsável pela correspondência
Email: radomskaya@ascnet.ru
675000 Blagoveshchensk, Russia
L. Shumilova
Institute of Geology and Natural Management of Far Eastern Branch of Russian Academy of Sciences
Email: shumilova.85@mail.ru
675000 Blagoveshchensk, Russia
A. Sorokin
Institute of Geology and Natural Management of Far Eastern Branch of Russian Academy of Sciences
Email: sorokinap@ignm.ru
675000 Blagoveshchensk, Russia
B. Soktoev
National Research Tomsk Polytechnic University
Email: bulatsoktoev@tpu.ru
634050 Tomsk, Russia
V. Ivanov
Far East Geological Institute, Far East Branch, Russian Academy of Sciences
Email: d159327@yandex.ru
690000 Vladivostok, Russia
L. Pavlova
Institute of Geology and Natural Management of Far Eastern Branch of Russian Academy of Sciences
Email: pav@ascnet.ru
675000 Blagoveshchensk, Russia
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