2001
DOI: 10.1016/s0301-7516(00)00035-1
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Sorption of atmospheric carbon dioxide and structural changes of Ca and Mg silicate minerals during grinding

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Cited by 79 publications
(41 citation statements)
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“…The position and shape of that band are identical to those in the IR spectra of carbonate-containing silicate glasses [1,2]. It was of interest to analyze the shape of the ν 3 band in the spectra of Ca(OH) 2 and CaO milled in CO 2 in order to ascertain whether these compounds may be formed during high-energy mechanical processing of silicates.…”
Section: Discussionmentioning
confidence: 99%
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“…The position and shape of that band are identical to those in the IR spectra of carbonate-containing silicate glasses [1,2]. It was of interest to analyze the shape of the ν 3 band in the spectra of Ca(OH) 2 and CaO milled in CO 2 in order to ascertain whether these compounds may be formed during high-energy mechanical processing of silicates.…”
Section: Discussionmentioning
confidence: 99%
“…Recent work [1][2][3] has shown that long-term mechanical activation (MA) of Ca-and Mg-containing silicates, such as diopside, CaMgSi 2 O 6 , akermanite, Ca 2 MgSi 2 O 7 , wollastonite, CaSiO 3 , and sphene (titanite), CaTiSiO 5 , in air or CO 2 atmosphere leads to extensive carbonation of these minerals, which sorb CO 2 from the gaseous environment. The sorbed CO 2 is present in ground minerals in the form of carbonate ions, which seem to be associated primarily with calcium ions.…”
Section: Introductionmentioning
confidence: 99%
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“…[27,28]. O pico a cerca de 2360 cm -1 pode ser atribuído ao CO 2 atmosférico [30]. Assim, os resultados de FTIR confirmam adicionalmente os resultados dos ensaios de EDX, TGA/ DTA e DRX das amostras coletadas.…”
Section: Resultsunclassified
“…Recent work [2][3][4] has shown that long-term grinding of Ca-and Mg-containing silicates, such as diopside (CaMgSi 2 O 6 ), wollastonite (CaSiO 3 ), akermanite (Ca 2 MgSi 2 O 7 ), and sphene (CaTiSiO 5 ), leads to extensive carbonation of these minerals, which sorb CO 2 from the gaseous environment in the form of distorted carbonate ions, presumably associated with divalentmetal cations. Note that this effect is related not to surface chemisorption but to an earlier unknown process-saturation of an amorphous mineral with carbon dioxide (the CO 2 content of mechanically activated materials may exceed 20 wt %).…”
Section: Introductionmentioning
confidence: 99%