An ultra-fast non-conventional waste management protocol to recycle of industrial fly ash into zeolite X

Sivalingam, Sivamani; Sen, Sujit

doi:10.1007/s11356-018-3664-9

Cited by 14 publications

(14 citation statements)

References 29 publications

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“…In order to shorten the pre-treatment or crystallization time, microwave technology was introduced into these synthesis processes. Sivalingam et al 27 synthesized NaX zeolite by using fly ash as a raw material, dissolving it in alkali under microwave irradiation (700 W) for 90 min, and crystallizing at 80 °C for 6 h. Luo et al 28 firstly calcined the kaolin at 730 °C into metakaolin, then mixed and stirred the metakaolin with sodium hydroxide, silica sol and deionized water, aged the mixture for 5 h, and then pre-crystallized it under 120 W for 30 min, and finally crystallized the mixture under 700 W for 90 min to synthesize NaX zeolite. Subsequently, Wu et al 29 improved the crystallization process by canceling the pre-crystallization step.…”

Section: Introductionmentioning

confidence: 99%

Insight into the kinetic behavior of microwave-assisted synthesis of NaX zeolite from lithium slag

Huang¹,

Wang²,

Lin³

et al. 2023

New J. Chem.

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Section: Introductionmentioning

confidence: 99%

Insight into the kinetic behavior of microwave-assisted synthesis of NaX zeolite from lithium slag

Huang¹,

Wang²,

Lin³

et al. 2023

New J. Chem.

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“…13 Zeolites, which are aluminosilicate materials, are one of the most extensively used adsorbents due to their high contaminant removal efficiency arising from a large surface area. 14 The cost of natural zeolites is high, and becomes even higher when synthetic compounds are used. Fly ash (FA), a solid residue from the combustion of coal, is produced in large quantities in several developing countries, where it is stockpiled or disposed of in non-engineered landfills.…”

Section: Introductionmentioning

confidence: 99%

Visible light photodegradation of methyl orange and Escherichia coli O157:H7 in wastewater

et al. 2022

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Water pollution due to dyes and pathogens is problematic worldwide, and the disease burden is higher in low-income countries where water treatment facilities are usually inadequate. Thus the development of low-cost techniques for the removal of dyes and pathogens in aquatic systems is critical for safeguarding human and ecological health. In this work, we report the fabrication and use of a photocatalyst derived from waste from coal combustion in removing dyes and pathogens from wastewater. Higher TiO2 loading of the photocatalyst increased the removal efficiency for methyl orange (95.5%), and fluorine-doping improved the disinfection efficacy from 76% to 95% relative to unmodified material. Overall, the work effectively converted hazardous waste into a value-added product that has potential in point-of-use water treatment. Future research should focus on upscaling the technique, investigating the fate of the potential of the photocatalysts for multiple reuse, and the recovery of TiO2 in treated water.

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“…Zeolite is a common micron-scale material, which is widely used in the fields of separation, catalysis, and energy depending on the good stability, mechanical properties, and suitable pore structure. However, the high raw material cost of synthetic zeolite currently limits its application to a large extent [25][26][27]. Basalt reserves are abundant in China, and a large amount of basalt waste powder will be produced during the mining process [28].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of zeolite X from waste basalt powder and its efficient adsorption of uranyl ions in solution

Deng

Zhao

et al. 2022

J Radioanal Nucl Chem

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In order to make full use of waste as raw materials to prepare low-cost zeolite, develop green chemical industry and achieve the purpose of treating waste with waste. High-purity zeolite X was prepared by the alkaline fusion hydrothermal method (AFH) using waste basalt powder as raw material, and was used as an adsorbent to investigate the adsorption performance for uranium-containing wastewater. The structure, morphology, specific surface area, chemical composition, chemical bonds, characteristic functional groups and chemical states of surface elements of the samples were characterized by XRD, SEM, BET, EDS, FT-IR and XPS. zeolite X with high crystallinity and rich hydroxyl/carboxyl groups was successfully synthesized by the AFH method, and its specific surface area was as high as 623.4 m 2 •g -1 . When the adsorption time (t) is 720 min, the adsorption temperature (T) is 30 ℃, the initial uranium (VI) concentration is (C0) 35 mg/L, pH is 6.0, and the adsorbent dosage (m) is 5/35 mg/mL, the equilibriu adsorption capacity of zeolite X for uranyl ions is 228.4 mg•g -1 . Thermodynamic results show that the adsorption process of uranyl ions by zeolite X is spontaneous and exothermic. Freundlich isotherms and quasi-second-order models are suitable to describe the adsorption process of uranyl ions by zeolite X. XPS analysis results show that -OH and -COOH play an important role in the adsorption process. At the same time, there is ion exchange between UO2 2+ and zeolite during the adsorption process.

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An ultra-fast non-conventional waste management protocol to recycle of industrial fly ash into zeolite X

Cited by 14 publications

References 29 publications

Insight into the kinetic behavior of microwave-assisted synthesis of NaX zeolite from lithium slag

Insight into the kinetic behavior of microwave-assisted synthesis of NaX zeolite from lithium slag

Visible light photodegradation of methyl orange and Escherichia coli O157:H7 in wastewater

Synthesis of zeolite X from waste basalt powder and its efficient adsorption of uranyl ions in solution

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