Green chemical conversion of large-scale aluminosilicates into zeolites for environmental remediation under carbon-neutral pressure

Chu, Zheting; Liang, Jiaxin; Yang, Dazhong; Chen, Hong

doi:10.1016/j.cogsc.2022.100632

Cited by 3 publications

(3 citation statements)

References 61 publications

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“…In hydrothermal synthesis of zeolite, homogenized well-mixed sol-gel is prepared by mixing precursors of silica and alumina, source of inorganic cations, and mineralizing agent (i.e., NaOH or KOH) along with the water as a solvent. The gel is then transferred to a teflon-coated autoclave reactor (static or agitated) and then heated for specific period of time with or without stirring [18,37,38]. As the hydrothermal crystallization proceeds the high temperature and autogenously generated highpressure environment triggered, the process of crystallization and the crystal growth proceeds according to the available environment to produce zeolite product.…”

Section: Hydrothermal Synthesis Methodsmentioning

confidence: 99%

“…On the contrary, longer aging period may dissolve the colloidal skeleton, which affects the quality of crystallinity of the zeolites [48]. The hydrothermal synthesis methods suffer with few disadvantages such as it consumes high energy, longer reactions time, and sometimes suffering from lower crystallization efficiency [38]. Therefore, there is a need to explore other green synthesis approaches and pretreatment methods to prepare sol-gel materials before hydrothermal synthesis.…”

Section: Hydrothermal Synthesis Methodsmentioning

confidence: 99%

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Transformation of Waste Coal Fly Ash into Zeolites for Environmental Applications

Lankapati¹,

Maheria²,

Dalai³

2024

Recent Advances for Coal Energy in the 21st Century

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The generation of a large quantity of waste coal fly ash (CFA) via coal combustion process during power generation is of major concern as disposal of such huge quantity of fly ash causes serious threats to the environment. There is an exigent need to find out the proper solution for its disposal/utilization to reduce its harmful effects. The composition of waste coal fly ash mostly consists of silica and alumina. Hence, the researchers are tempted to utilize waste coal fly ash as a starting ingredient to make value-added materials like zeolites. It is anticipated that such research efforts will act as a valuable aid to reduce the disposal cost of fly ash and ultimately reduce harmful effects of fly ash to the environment. In this review, various synthesis methods to synthesize different types of zeolites from CFA, such as Zeolite-A, Zeolite-X and Zeolite-P, have been summarized and their potential for various applications such as sorption and catalysis has been explored.

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Section: Hydrothermal Synthesis Methodsmentioning

confidence: 99%

Section: Hydrothermal Synthesis Methodsmentioning

confidence: 99%

Transformation of Waste Coal Fly Ash into Zeolites for Environmental Applications

Lankapati¹,

Maheria²,

Dalai³

2024

Recent Advances for Coal Energy in the 21st Century

View full text Add to dashboard Cite

show abstract

“…Aiming to challenge the multifunctional material design for Cr(VI)-polluted groundwater remediation, herein, we demonstrate a three-in-one strategy by integrating the charge-ordered greigite with the red soil–based ANA-type zeolite (Re-ANA) to construct the greigite/Re-ANA composite (GRAs) materials. Within this design, the functional merits of chemical-/photo-reductive functionality within greigite and positive ion-exchange functionality within ANA-type zeolite − have been successfully integrated within one material matrix, which is capable of doing closed-loop Cr(VI)-contaminated groundwater remediation, as depicted in Figure . The as-synthesized GRA-3 showed great Cr(VI) removal efficiency.…”

Section: Introductionmentioning

confidence: 99%

Three-in-One: Coupling Chemical Reduction, Photoreduction, and Ion-Exchange Mechanisms in Greigite/Red Soil-Based Analcime Zeolite Composites for Cr(VI) Remediation in Groundwater

Tang,

Deng,

Chu

et al. 2023

ACS EST Eng.

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Simultaneously reducing and immobilizing Cr(VI) anions in groundwater are crucial to minimize their hazardous effects. Herein, benefiting from the feasible chemical-/photo-reduction capability of greigite, together with the ion-exchange functionality of zeolites, the integrated three-in-one function in greigite/Re-ANA composites (GRAs) material has been employed for removing and immobilizing Cr(VI) in groundwater remediation. GRA-3 achieved a 99.4% Cr(VI) removal efficiency in a Cr(VI) solution with 1 mg/L. Cr(VI) residue concentration is 0.006 mg/L, complying with the control guideline in drinking water according to WHO regulations. A comprehensive mechanism study reveals that the chemical reduction and photoreduction processes are involved within greigite, which drives the process of reducing Cr(VI) to Cr(III). Subsequently, the as-reduced Cr(III) is either adsorbed on a greigite surface or ionexchanged with zeolite microporous channels, thus getting immobilized. Furthermore, environmentally relevant Cr(VI) contaminated groundwater sampling from the chromate plant has been employed for the fixed-bed column study, which achieved the discharge standard for practical Cr(VI) polluted groundwater. This work reported a composite material matrix with great potential and significance for Cr(VI) remediation, which could be employed in permeable reactive barriers for Cr(VI)-polluted groundwater remediation in the future.

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From aluminum foil to personalized medicine: Ecofriendly one-step electrode modification for rapid detection of ertapenem and co-administered medications

El-Gendy

Mohamed

Amirghasemi

et al. 2023

Journal of Science: Advanced Materials and Devices

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Green chemical conversion of large-scale aluminosilicates into zeolites for environmental remediation under carbon-neutral pressure

Cited by 3 publications

References 61 publications

Transformation of Waste Coal Fly Ash into Zeolites for Environmental Applications

Transformation of Waste Coal Fly Ash into Zeolites for Environmental Applications

Three-in-One: Coupling Chemical Reduction, Photoreduction, and Ion-Exchange Mechanisms in Greigite/Red Soil-Based Analcime Zeolite Composites for Cr(VI) Remediation in Groundwater

From aluminum foil to personalized medicine: Ecofriendly one-step electrode modification for rapid detection of ertapenem and co-administered medications

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