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Investigation of adsorption accumulation of microcomponents in various horizonts of laterate bauxite-bearing weatherin profileстатья Научная хроника Исследовательская статья Электронная публикация
- Авторы: Makarova M.A., Karaseva O.N.
- Журнал: Experiment in GeoSciences
- Том: 24
- Номер: 1
- Год издания: 2018
- Первая страница: 203
- Последняя страница: 206
- Аннотация: Experiments on the adsorption of trace elements on various types of rocks of lateritic weathering cores have been conducted under static conditions. Results on the adsorption of trace elements were obtained as a function of pH (3, 4.5, 5.5, and 7) and of the initial concentration of the solution (1ppm-20ppb). As adsorbents, samples of rocks of the bauxite profile (from the top downwards along the section) were used: cuirass, bauxites, laterites of transition zone. It is determined that against a background of high Al content in the solution, as a result of partial dissolution of gibbsite at pH 3, an insignificant desorption of most trace elements is observed. Significant adsorption was revealed for Ga, Sc. Microelements Be, Y, As, U, Pb, REE are adsorbed almost completely at pH 4.5-7. The partial adsorption is observed for Co, Ni, Cu and Cd. The absorption values of V, Th, and Bi by the solid phase, regardless of the rock and the pH, were 98-100%. The experimental data are in good agreement with the accumulation of trace elements in the profile of lateritic bauxiton weathering crusts.
- Добавил в систему: Макарова Марина Александровна