Synthesis of hydroxysodalite zeolite by alkali-activation of basalt powder rich in calc-plagioclase

Esaifan, Muayad; Hourani, Mohammed Khair; Khoury, Hani; Rahier, Hubert; Wastiels, Jan

doi:10.1016/j.apt.2016.11.002

Cited by 27 publications

(28 citation statements)

References 41 publications

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“…3Al2O3·2SiO2·H2O + 8NaOH → Na8Al6Si6O24(OH)2·4H2O + 2H2O. SEM images of the hydrothermal alkali-activation product of China clay (Figure 3a) are characterized by homogenous pseudohexagonal crystals of hydroxy-sodalite zeolite, similar to previously published studies [45]. The presence of calcite during the hydrothermal alkali-activation of China clay gave rise to additional long hexagonal needles (Figure 3b) characteristic of cancrinite [46].…”

Section: Characterization Of the Synthesized Zeolitesupporting

confidence: 85%

Synthesis of Hydroxy-Sodalite/Cancrinite Zeolites from Calcite-Bearing Kaolin for the Removal of Heavy Metal Ions in Aqueous Media

et al. 2019

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A hydroxy-sodalite/cancrinite zeolite composite was synthesized from low-grade calcite-bearing kaolin by hydrothermal alkali-activation method at 160 • C for 6 h. The effect of calcite addition on the formation of the hydroxy-sodalite/cancrinite composite was investigated using artificial mixtures. The chemical composition and crystal morphology of the synthesized zeolite composite were characterized by X-ray powder diffraction, infrared spectroscopy, scanning electron microscopy, and N 2 adsorption/desorption analyses. The average specific surface area is around 17-20 m 2 ·g −1 , whereas the average pore size lies in the mesoporous range (19-21 nm). The synthesized zeolite composite was used as an adsorbent for the removal of heavy metals in aqueous solutions. Batch experiments were employed to study the influence of adsorbent dosage on heavy metal removal efficiency. Results demonstrate the effective removal of significant quantities of Cu, Pb, Ni, and Zn from aqueous media. A comparative study of synthesized hydroxy-sodalite and hydroxy-sodalite/cancrinite composites revealed the latter was 16-24% more efficient at removing heavy metals from water. The order of metal uptake efficiency for these zeolites was determined to be Pb > Cu > Zn > Ni. These results indicate that zeolite composites synthesized from natural calcite-bearing kaolin materials could represent effective and low-cost adsorbents for heavy metal removal using water treatment devices in regions of water shortage.

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Section: Characterization Of the Synthesized Zeolitesupporting

confidence: 85%

Synthesis of Hydroxy-Sodalite/Cancrinite Zeolites from Calcite-Bearing Kaolin for the Removal of Heavy Metal Ions in Aqueous Media

et al. 2019

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“…Regardless of precursor type and amount, the activators have either contained sodium hydroxide and sodium silicate or they have only contained one type of hardener. For instance, other studies were conducted on geopolymer-containing basalt and only sodium hydroxide was used as an activator at different activator/precursor ratio from 0.1 to 0.5 [96]. In addition, basalt was obtained as raw material and was milled to a very fine powder.…”

Section: Precursor Pre-treatment and Calcinationmentioning

confidence: 99%

Quarry Waste as Precursors in Geopolymers for Civil Engineering Applications: A Decade in Review

Solouki

Viscomi²,

Lamperti³

et al. 2020

Materials

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Carbon footprint reduction of paving materials could be explored through recycling mining by-products into different applications, which will preserve natural resources and decrease environmental issues. One possible approach is to reuse quarry dust and mining ore waste as precursors in geopolymer applications. geopolymers are mineral polymers rich in aluminosilicates with an amorphous to a semi-crystalline three-dimensional structure. The current review aims to summarize the studies conducted during the past decade on geopolymers containing quarry dust and mine tailings. The first section discusses various precursors used for geopolymer cement production such as metakaolin, ground granulated blast furnace slag (GGBFS), fly ash, and quarry/mining ore wastes including silt, tungsten, vanadium, copper, gold, zinc, marble, iron, basalt, and lithium. Different calcination treatments and curing conditions have been summarized. In some cases, the precursors are required to be calcined to increase their reactivity. Both ambient temperature and elevated temperature curing conditions have been summarized. Less attention has been paid to room temperature curing, which is necessary for field and industrial implementations. Engineering properties such as compressive strength, density, durability and acid resistance, water absorption and abrasion of geopolymers containing mining waste were reviewed. One of the main barriers preventing the widespread use of waste powders, in addition to economic aspects, in geopolymers could be due to their unstable chemical structure. This was shown through extensive leachate of Na+ or K+ cations in geopolymer structures. The review of over 100 articles indicated the need for further research on different aspects of quarry waste geopolymer productions before its full industrial implementation.

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“…The TGA curves of the prepared composite materials showed that the major mass loss steps occurred above 500˚C (Figure 1 The chemical compositions of PK and JK samples are listed in Table 2. The PK powder is composed mainly of 47.8% SiO 2 and 36.1% Al 2 O 3 that makes it suitable for H-SOD synthesis [14].…”

Section: Resultsmentioning

confidence: 99%

“…This particular channel-like structure is responsible for many applicable properties of the H-SOD, such as molecular sieving [9], catalytic activities [10], ion exchange [11], and high selectivity for adsorption [12] [13]. Using naturally occurring aluminosilicate materials such as kaolinite can reduce further CO 2 emissions produced from thermally activated aluminosilicates [14]. Aluminosilicate polymers have many enticing properties such as malleability, and ability to be molded in various complex shapes and to be intercalated with different conductive additives, such as carbon nanotubes, graphite powder and metal nanowires [15].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Electroconducting Hydroxy-Sodalite/Graphite Composite: Preparation and Characterization

Alomari¹,

Esaifan²,

Hourani³

et al. 2019

AMPC

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Electroconductive hydroxy-sodalite/graphite composites were synthesized by alkali-activation of kaolinite in the presence of sodium hydroxide as the alkali activator and graphite as a conductive filler. Thermal, morphological and microstructural properties in addition to direct current (D.C.) conductivity of the prepared composites were investigated. Thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy in the attenuated total reflection mode (FTIR/ATR), X-ray diffraction (XRD), scanning electron microscope/energy dispersive using X-ray analysis (SEM/EDX) and DC conductivity measurements were used to characterize the prepared composites. The effect of the hydroxyl-sodalite-to-graphite and NaOH-to-kaolinite ratios on the electrical conductivity was investigated and evaluated on the generated composite specimens made of Jordanian kaolinite or pure kaolinite. It was demonstrated that increasing the mass ratio of graphite-to-kaolinite in the clay-based composites increased the electrical conductivity of the resultant composites. It was also observed that using 1:1 graphite-to-pure kaolinite mass ratio showed the best electrical conductivity value of 3 × 10 −3 s/cm, among the other mass ratios used for pure kaolinite specimens, while using 1:1 mass ratio of graphite-to-Jordanian kaolinite showed a conductivity of 1.6 s/cm.

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Synthesis of hydroxysodalite zeolite by alkali-activation of basalt powder rich in calc-plagioclase

Cited by 27 publications

References 41 publications

Synthesis of Hydroxy-Sodalite/Cancrinite Zeolites from Calcite-Bearing Kaolin for the Removal of Heavy Metal Ions in Aqueous Media

Synthesis of Hydroxy-Sodalite/Cancrinite Zeolites from Calcite-Bearing Kaolin for the Removal of Heavy Metal Ions in Aqueous Media

Quarry Waste as Precursors in Geopolymers for Civil Engineering Applications: A Decade in Review

Synthesis of Electroconducting Hydroxy-Sodalite/Graphite Composite: Preparation and Characterization

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