2014
DOI: 10.1016/j.minpro.2014.09.001
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Effect of acid treatment on the chemical composition and the structure of Egyptian diatomite

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Cited by 37 publications
(26 citation statements)
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“…1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 Feldspar K (KSi 3 AlO 8 -orthoclase) is clearly detectable in all of the resulting ashes, whereas arcanite is formed only in wheat straw A-H 2 SO 4 -24. The formation of the last two phases could be due to a thermodynamic effect ("back formation" of feldspar or arcanite through reduction of part of the amorphous silica) 48 . The remaining low concentrations of Al 2 O 3 , CaO and K 2 O in the ashes (Tables 2 and 3) can be assigned to phases such as feldspar K, arcanite and anhydrite, as confirmed by XRD.…”
Section: Impact Of the Pretreatment Process On The Chemical Compositimentioning
confidence: 99%
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“…1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 Feldspar K (KSi 3 AlO 8 -orthoclase) is clearly detectable in all of the resulting ashes, whereas arcanite is formed only in wheat straw A-H 2 SO 4 -24. The formation of the last two phases could be due to a thermodynamic effect ("back formation" of feldspar or arcanite through reduction of part of the amorphous silica) 48 . The remaining low concentrations of Al 2 O 3 , CaO and K 2 O in the ashes (Tables 2 and 3) can be assigned to phases such as feldspar K, arcanite and anhydrite, as confirmed by XRD.…”
Section: Impact Of the Pretreatment Process On The Chemical Compositimentioning
confidence: 99%
“…The particle to the other two samples. However, the presence of mineral impurities (e.g., feldspar and quartz) in the resulting ashes can increase the specific gravity and particle size 48 .…”
Section: Impact Of the Pretreatment Process On The Chemical Compositimentioning
confidence: 99%
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“…Figure shows the XRD patterns of the diatomite and MUF resin with different fillers. In the pattern of diatomite, two strong characteristic peaks observed at 2θ values near 21.8 and 36.0 ° were attributed to amorphous silica (diatomite) . Compare to the pattern of the MUF resin with 100% wheat flour, after diatomite was added to the filler formulation, the pattern of the resulting resin also showed these characteristic peaks of diatomite.…”
Section: Resultsmentioning
confidence: 86%
“…Furthermore, correlation of results with another type of diatomite from an Egyptian study was considered [18]. The effect of acid treatment on different forms of highly and purified Egyptian diatomite was performed [19].…”
Section: Resultsmentioning
confidence: 99%