Application of activated diatomite for dry lime mixes

Логанина, В. И.; Simonov, Evgenij E.; Jezierski, Walery; Małaszkiewicz, Dorota

doi:10.1016/j.conbuildmat.2014.04.098

Cited by 35 publications

(18 citation statements)

References 14 publications

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“…The diatomite (100g) was modified (treated), by washing with ultra-pure water (1000mL) under mechanical stirring at room temperature (22 ±1 0 C) for 24h and then was dried overnight; the washed diatomite is noted Dw. Diatomite is fine grained, and essentially consists of silica (SiO 2 nH 2 O) [20,21].…”

Section: )mentioning

confidence: 99%

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Remediation of Wastewater Containing Heavy Metals Using Modified Diatomite

Vişa

Isac

Duţă

2014

J. Memb. Separ. Tech.

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Diatomite, wood fly ash and their mixture with TiO2 were tested as adsorption substrates for copper and cadmium cations removal from wastewater. Raw diatomite and wood ash were pretreated and stabilized by washing and were comparatively investigated as adsorption substrates for heavy metals. Further on, a composite mix of pretreated diatomite and wood ash was obtained by mixing with nano-structured TiO2, to increase the surface area of the substrate materials. The novel adsorbent was investigated in terms of crystallinity (XRD), surface properties (AFM, SEM, porosity and BET surface) and surface chemistry (EDX, FTIR). Equilibrium studies demonstrated that the novel material has a high capacity for Cu 2+ and Cd 2+ removal, showing removal efficiencies above 80% for cadmium and of 99% for copper cations, in optimised adsorption experiments. In this paper the kinetic mechanisms of the cation adsorption are discussed and are correlated with the substrates properties.

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Section: )mentioning

confidence: 99%

“…The main constituents of diatomite are silica (SiO 2 ) and aluminosilicates. The analysis shows that SiO 2 is the main component (above 70%) and the metal oxides (Al 2 O 3 , Na 2 O and Fe 2 O 3 ) are the main minor constituents [20].…”

Section: Introductionmentioning

confidence: 99%

Remediation of Wastewater Containing Heavy Metals Using Modified Diatomite

Vişa

Isac

Duţă

2014

J. Memb. Separ. Tech.

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“…It represents a biogenetic rock; grayish, soft, very light, weakly cemented, finely opal sedimentary rock [9]. The results from the physical-chemical and mineralogical-petrographic characterization show that this non-metallic raw material can be used as the basic component in the production of light insulating construction materials, thermal insulators, lightweight construction materials, for the synthesis of zeolites [15], purification of industrial waters [16], in the cement industry (as pozzolanic material) [17][18][19][20][21][22][23][24] as pesticide holder, as well as for improving the physical and chemical characteristics of certain soils.…”

Section: Introductionmentioning

confidence: 99%

Effect of Thermal Treatment of Clayey Diatomite at Temperature Range 800-1200°C

Reka¹,

Pavlovski²,

Ademi³

et al. 2020

Prime Archives in Chemistry

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Trepel is the local name for a mixture of diatomaceous earth and clay minerals. It represents a greyish, soft, very light, weakly cemented, fine biogenetic sedimentary rock. The studied material is taken from the vicinity of Bitola city (Republic of Macedonia). Here, clayey diatomite was treated up to three temperature intervals (800, 1000 and 1200 o C) for a period of 1 hour. The X-ray powder diffraction results indicate the presence of both an amorphous phase and the following crystalline phases: quartz, feldspars (plagioclase), mica (muscovite) and chlorites. The results of SEM analysis revealed skeletons of alga Diatomeae with nano-pores. By thermal treatment of the samples, a gradual change in color as well as higher bulk density and compressive strength was observed. The increase of the temperature, in addition, affected the mineralogical composition and increased the presence of the amorphous phase (aluminasilicate glassy phase). SEM results of the thermally investigated samples depicted morphological changes expressed by shrinkage of the pore diameters in comparison to the initial material. The major and minor constituents were established by chemical analysis revealing the following chemical composition of raw clayey diatomite: SiO 2 (63.65 wt%), Al 2 O 3 (11.76 wt%), Fe 2 O 3 (5.93 wt%), MnO (0.13 wt%), TiO 2 (0.63 wt%), CaO (1.42 wt%), MgO (2.22 wt%), P 2 O 5 (0.11 wt%), K 2 O (1.63 wt%), Na 2 O (0.92 wt%), LOI (11.50 wt%).

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“…It represents a biogenetic rock; grayish, soft, very light, weakly cemented, finely opal sedimentary rock [9]. The results from the physical-chemical and mineralogicalpetro graphic characterization show that this non-metallic raw material can be used as the basic component in the production of light insulating construction materials, thermal insulators, lightweight construction materials, for the synthesis of zeolites [15], purification of industrial waters [16], in the cement industry (as pozzolanic material) [17][18][19][20][21][22][23][24] as pesticide holder, as well as for improving the physical and chemical characteristics of certain soils.…”

Section: Introductionmentioning

confidence: 99%

Effect Of Thermal Treatment Of Trepel At Temperature Range 800-1200˚C

et al. 2019

View full text Add to dashboard Cite

Trepel is the local name for a mixture of diatomaceous earth and clay minerals. It represents a greyish, soft, very light, weakly cemented, fine biogenetic sedimentary rock. The studied material is taken from the vicinity of Bitola city (Republic of Macedonia). Here, trepel was treated up to three temperature intervals (800, 1000 and 1200C) for a period of 1 hour. The X-ray powder diffraction results indicate the presence of both an amorphous phase and the following crystalline phases: quartz, feldspars (plagioclase), mica (muscovite) and chlorites. The results of SEM analysis revealed skeletons of alga Diatomeae with nano-pores. By thermal treatment of the samples, a gradual change in color as well as higher bulk density and compressive strength was observed. The increase of the temperature, in addition, affected the mineralogical composition and increased the presence of the amorphous phase (aluminasilicate glassy phase). SEM results of the thermally investigated samples depicted morphological changes expressed by shrinkage of the pore diameters in comparison to the initial material. The major and minor constituents were established by chemical analysis revealing the following chemical composition of raw trepel: SiO2 (63.65 wt%), Al2O3 (11.76 wt%), Fe2O3 (5.93 wt%), MnO (0.13 wt%), TiO2 (0.63 wt%), CaO (1.42 wt%), MgO (2.22 wt%), P2O5 (0.11 wt%), K2O (1.63 wt%), Na2O (0.92 wt%), LOI (11.50 wt%).

show abstract

Application of activated diatomite for dry lime mixes

Cited by 35 publications

References 14 publications

Remediation of Wastewater Containing Heavy Metals Using Modified Diatomite

Remediation of Wastewater Containing Heavy Metals Using Modified Diatomite

Effect of Thermal Treatment of Clayey Diatomite at Temperature Range 800-1200°C

Effect Of Thermal Treatment Of Trepel At Temperature Range 800-1200˚C

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