Characterization of smectite after acid activation with microwave irradiation

Korichi, S.; Elias, Abdelhamid; Mefti, A.

doi:10.1016/j.clay.2008.04.014

Cited by 84 publications

(57 citation statements)

References 41 publications

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“…Following Korichi et al (2009), to avoid exceeding 100°C in the system, the microwave irradiation was applied in a discontinuous form. After 1 min of microwave irradiation the suspensions were cooled for 5 min at room temperature.…”

Section: Microwave Systemmentioning

confidence: 99%

Microwave assisted acid treatment of sepiolite: The role of composition and “crystallinity”

Franco

Pozo

Cecilia

et al. 2014

Applied Clay Science

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Section: Microwave Systemmentioning

confidence: 99%

Microwave assisted acid treatment of sepiolite: The role of composition and “crystallinity”

Franco

Pozo

Cecilia

et al. 2014

Applied Clay Science

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“…18,22 The intensity of the d 001 peak of montmorillonite at 15.33 Å in RB drastically decreased in the diffraction patterns of 0.2-AAB and 0.4-AAB (Figure 1b-c). Meanwhile, the d 060 peak at 1.50 Å, which is typical of dioctahedral smectites, 14,23 reached a maximum in the 0.4-AAB pattern. The intensity of the d 004 and d 005 peaks of montmorillonite, which were seen as combined features with those of tridymite (T) at 3.80 and 2.99 Å, 24,25 paralleled the weakening of the d 001 peak.…”

Section: Chemical Composition Of Raw and Acid-activated Bentonitesmentioning

confidence: 99%

Characterization of Unye bentonite after treatment with sulfuric acid

Çağlar¹,

Afsin²,

Koksal³

et al. 2013

Quím. Nova

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Recebido em 4/9/12; aceito em 25/3/13; publicado na web em 13/6/13Unye bentonite was found to consist predominantly of a dioctahedral smectite along with quartz, tridymite, cristobalite, and minor fractions of feldspar and anatase. A considerable amount of Al was retained as a constituent in acid-resistant impurities following the decomposition of the montmorillonite via acid treatment at an acid/clay ratio of 0.4. These impurities were mesoporous with a maximum surface area of 303.9±0.4 m 2 g -1 . A sharp decrease in the d 001 lattice spacing of the montmorillonite to 15.33 Å reflected the reduction of the crystallinity in the activated products. In addition, the increase in the ease with which newly formed hydroxyl groups were lost paralleled the severity of the acid treatment.

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“…Except the conventional technique, which is a time, energy, and water consuming process, there are few studies on the solid-state intercalation (Ogawa et al, 1990a,b;Kuroda, 1995, 1997;Yoshimoto et al, 2005) and the microwave irradiation (Korichi et al, 2009(Korichi et al, , 2014Liu et al, 2011). Compared to the conventional batch method, solid-solid intercalation and microwave irradiation method are easy to operate and more suitable techniques for intercalation processing (Rastogi et al, 1977;Patil et al, 1984;Toda et al, 1987;Stein et al, 1993).…”

Section: Introductionmentioning

confidence: 96%