A possible way to storage carbon dioxide on mechanically activated olivine (Mg,Fe)2SiO4

This paper deals with mechanical carbonation of olivine by dry and wet modes. Mechanical activation and carbonation of the olivine samples have been performed using a planetary mill, Pulverisette 6 (Fritsch, Germany). A series of experiments were produced where the activated products were exposed to carbon dioxide during activation in presence of water and by dry mode of milling. To identify mechanically induced changes in surface of the mineral, specific surface area measurements have been used. To identify carbon dioxide sequestration, infrared spectroscopy and determination of total carbon have been used. Infrared spectroscopy seemed to be a suitable method for characterization of CO2 absorption on mechanically modified olivine

Arsenic Sorption on Mechanically Activated Magnetite and Olivine

Arsenic sorption on mechanically activated minerals such as magnetite Fe3O4 (Kiruna, Sweden) and olivine (Mg,Fe)2SiO4 (Ǻheim,Norway) has been studied and compared in this work. Experiments were carried out with non-activated and mechanically activatedsamples. The activation of both minerals was performed in a planetary mill at different milling conditions. The specific surface areaand consequent sorption activity were enhanced by mechanical activation. The using of olivine seems to be better than magnetite fromthe point of view of milling time, which is necessary for achievement of the same sorption effect

Combined mechanochemical/thermal synthesis of microcrystalline pyroxene LiFeSi2O6 and one-step mechanosynthesis of nanoglassy LiFeSi2O6-based composite

Both, microcrystalline LiFeSi2O6 pyroxene and nanoglassy LiFeSi2O6-based composite are prepared via non-conventional mechanochemical/ thermal processing and one-step mechanosynthesis, respectively. The structural state of the as-prepared materials on the long-range and local atomic scales is characterized by XRD and Fe-57 Mossbauer spectroscopy, respectively. The derived hyperfine interaction parameters indicate that the nanoglassy nature of the mechanosynthesized LiFeSi2O6-based composite is characterized, on the short-range scale, by a broadly distorted geometry of the constituent structural units, and on the long-range scale, by the raptured chains of the edge-sharing FeO6 octahedra and of the corner-sharing SiO4 tetrahedra.Web of Science70731431