Impact of Fly Ash Fractionation on the Zeolitization Process

Czarna-Juszkiewicz, Dorota; Kunecki, Piotr; Panek, Rafał; Madej, Jarosław; Wdowin, Magdalena

doi:10.3390/ma13051035

Cited by 22 publications

(16 citation statements)

References 50 publications

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“…The PDI of the particle is 0.210 which proves that the particles are monodispersed in the solvent. and 27.9 °and the peak at 32.6 °could be due to calcite [62].…”

Section: Resultsmentioning

confidence: 96%

Experimental and Computational Approaches for the Structural Study of Novel Ca-Rich Zeolites from Incense Stick Ash and Their Application for Wastewater Treatment

Yadav¹,

Choudhary

Ali

et al. 2021

Adsorption Science & Technology

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At present, chemical Si/Al sources are mainly used as precursor materials for the manufacturing of zeolites. Such precursor materials are quite expensive for commercial synthesis. Here, we have reported the synthesis of Ca-based zeolite from incense stick ash waste by the alkali-treatment method for the first time. Incense stick ash (ISA) was used as a precursor material for the synthesis of low Si zeolites by the alkali-treatment method. The as-synthesized zeolites were characterized by various instruments like particle size analyzer (PSA), Fourier transform infrared (FTIR), X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), electron diffraction spectroscopy (EDS), transmission electron microscopy (TEM), and X-ray fluorescence (XRF). FTIR and XRD helped in the identification of the microstructure and crystalline nature of the zeolites and also confirmed the synthesis of Ca-based zeolite with two thetas at 25.7°. The microscopic analysis by FESEM and TEM exhibited that the size of synthesized Ca-rich zeolites varies from 200 to 700 nm and they are aggregated and cuboidal in shape. Additionally, structural, electronic, and density of states’ characteristics of gismondine (Ca2Al4Si4O16·9H2O) structures were evaluated by computational simulations (first principle, density functional theorem). The structural optimization of structures was carried out in the first stage under the lowest condition of total energy and forces acting on atoms for the lattice constant, as well as the available experimental and theoretical findings. The present research approach predicted the transformation of ISA waste into a value-added mineral, i.e., zeolite, which was further used for the removal of both heavy metals and alkali metals from fly ash-based wastewater using inductively coupled plasma-optical emission spectroscopy (ICP-OES).

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“…The PDI of the particle is 0.210 which proves that the particles are monodispersed in the solvent. and 27.9 °and the peak at 32.6 °could be due to calcite [62].…”

Section: Resultsmentioning

confidence: 96%

Experimental and Computational Approaches for the Structural Study of Novel Ca-Rich Zeolites from Incense Stick Ash and Their Application for Wastewater Treatment

Yadav¹,

Choudhary

Ali

et al. 2021

Adsorption Science & Technology

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“…In this case fly ash is mixed with hydroxide solid (pellets) and treated at high temperatures. This method improved modification degree, when spherical, rosetteshaped, or X-shaped crystals can be obtained as consequence of homogeneous and heterogeneous nucleation [52]. The fine fractions of ashes, determining larger reaction surface with NaOH solution, and higher hydroxide quantities, providing more crystallization centers and a new material with nanometric particles, can be obtained.…”

Section: Fusion Methodsmentioning

confidence: 99%

“…• Adsorbents for heavy metal removal [32,33,[43][44][45] • Adsorbents for organic compounds removal [22][23][24]46] • The catalysts [47,49] • Adsorbents for gas retention [50,51] • Zeolites [7,31,46,[52][53][54] • Geopolymers synthesis [55][56][57] • Alkali-activated materials [58] The main applications of fly ashes are presented in Fig. 2.…”

Section: Adsorbents For Pollutant Removalmentioning

confidence: 99%

“…Vitreous phasescomposed of glassy materialexhibits higher reactivity in alkali or acid solutions, compared with quartz and mullite phases of the fly ash particle. The amorphous silica and alumina are relatively easy to dissolve in alkaline solutions, causing the solution to enter the inner layers [52]. The SiO 2 phases attacked by cation (Na + or K + ) determine formation of the soluble sodium silicate.…”

Section: Synthesis and Characterization Of Eco-friendly Nano-adsorbentsmentioning

confidence: 99%

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Eco-friendly Nano-adsorbents for Pollutant Removal from Wastewaters

Harja¹,

Ciobanu²

2020

Handbook of Nanomaterials and Nanocomposites for Energy and Environmental Applications

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Major changes of the environment are caused by the presence of pollutants in air, soil, and wastewaters. From these, a major attention is accorded to the industrial wastewaters, because can contain simultaneous different types of pollutants such as heavy metals, anions, dyes, phenols, pesticides, drugs, etc. For wastewater treatment, consecrated methods such as adsorption, photocatalysis, membrane separation, etc. can be used, adsorption being considered one of the most favorable techniques. In the last years, an increase in interest was observed in nanoadsorbent materials with low cost. Ecofriendly nano-adsorbents include the materials obtained from industrial wastes, agricultural sources, and by-products, recognized as low-cost sources. These nano-adsorbents, obtained by "green technologies," have adsorption capacities, comparable to the expensive adsorbents (modified chitosan, activated carbon, complex inorganic composites, etc.).

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“…Coal is one of the most abundant energy sources worldwide [12]. A previous study reported that the global trend of increasing energy production continued in 2018 [13]. In addition, it is desirable to increase coal-fired power generation by up to 46% of the total electricity production by 2030 [14].…”

Section: Introductionmentioning

confidence: 99%

Adsorption/Desorption Capability of Potassium-Type Zeolite Prepared from Coal Fly Ash for Removing of Hg2+

et al. 2021

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The feasibility of using potassium-type zeolite (K-type zeolite) prepared from coal fly ash (CFA) for the removal of Hg2+ from aqueous media and the adsorption/desorption capabilities of various potassium-type zeolites were assessed in this study. Potassium-type zeolite samples were synthesized by hydrothermal treatment of CFA at different intervals (designated CFA, FA1, FA3, FA6, FA12, FA24, and FA48, based on the hours of treatment) using potassium hydroxide solution, and their physicochemical characteristics were evaluated. Additionally, the quantity of Hg2+ adsorbed was in the order CFA, FA1 < FA3 < FA6 < FA12 < FA24 < FA48, in the current experimental design. Therefore, the hydrothermal treatment time is important to enhance the adsorption capability of K-type zeolite. Moreover, the effects of pH, temperature, contact time, and coexistence on the adsorption of Hg2+ were elucidated. In addition, Hg2+ adsorption mechanism using FA48 was demonstrated. Our results indicated that Hg2+ was exchanged with K+ in the interlayer of FA48 (correlation coefficient = 0.946). Finally, adsorbed Hg2+ onto FA48 could be desorbed using a sodium hydroxide solution (desorption percentage was approximately 70%). Our results revealed that FA48 could be a potential adsorbent for the removal of Hg2+ from aqueous media.

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Impact of Fly Ash Fractionation on the Zeolitization Process

Cited by 22 publications

References 50 publications

Experimental and Computational Approaches for the Structural Study of Novel Ca-Rich Zeolites from Incense Stick Ash and Their Application for Wastewater Treatment

Experimental and Computational Approaches for the Structural Study of Novel Ca-Rich Zeolites from Incense Stick Ash and Their Application for Wastewater Treatment

Eco-friendly Nano-adsorbents for Pollutant Removal from Wastewaters

Adsorption/Desorption Capability of Potassium-Type Zeolite Prepared from Coal Fly Ash for Removing of Hg2+

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