Facile synthesis of zeolite NaX using rice husk ash without pretreatment

Tran‐Nguyen, Phuong Lan; Ly, K.T.; Thanh, Lương Huỳnh Vủ; Angkawijaya, Artik Elisa; Santoso, Shella Permatasari; Tran, Nguyen‐Phuong‐Dung; Tsai, Meng‐Lin; Ju, Yi‐Hsu

doi:10.1016/j.jtice.2021.05.009

Cited by 19 publications

(15 citation statements)

References 53 publications

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“…Zeolite NaP1 still has not yet been formed at low alkalinity (~ 1.0 M); nevertheless, the zeolite structures uniformly arrange and form zeolite frameworks at the appropriate alkalinity concentration. As a result, the characteristic peaks of zeolite NaP1 fully appeared at alkalinity levels of 1.5–3.0 M. However, the dissolving of zeolite NaP1 and the formation of by‐products (such as zeolite NaX or sodalite) were also reported at high alkalinity 16,29,45,46 …”

Section: Resultsmentioning

confidence: 98%

“…RHA collected from the local company at Can Tho City, Vietnam, was directly used for the NaP1 synthesis. The characteristics of RHA can be found in the study of Tran‐Nguyen et al 29 . Analytical chemicals used in this work, such as sodium hydroxide pellets (purity 97%) and potassium dihydrogen phosphate (purity 99.5%), were bought from Acros (New Jersey, USA).…”

Section: Methodsmentioning

confidence: 99%

“…Aging time is a vital parameter of the reaction because it can cause changes to the material phase, especially the types, crystal sizes, and surface area of zeolites 28 . The aging time can be adjusted depending on the desired types and properties of zeolites 27,29 …”

Section: Introductionmentioning

confidence: 99%

“…28 The aging time can be adjusted depending on the desired types and properties of zeolites. 27,29 Following the procedure of Tran-Nguyen et al regarding the synthesis of NaX, 29 this work developed a synthesis process of zeolite NaP1 from RHA. The main goal of the study was to synthesize RHA-derived zeolite NaP1 and evaluate its adsorption capacity for phosphate removal.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the potential removal of phosphate using rice husk ash‐derived zeolite NaP1

Tran‐Nguyen

Nguyen

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUND Zeolite NaP1 with high crystalline intensity and good shape has been synthesized by utilizing rice husk ash. Several factors related to the formation of zeolite, such as mixing ratios, aging time, and reaction time, were investigated. Furthermore, the potential phosphate adsorption of the optimal synthesized zeolite was evaluated. RESULTS Under the optimal conditions (SiO2/Al2O3 molar ratio = 4.0, NaOH concentration = 1.5 M, aging time = 12 h, and reaction time = 8 h), the surface area and pore diameter of the zeolite NaP1 obtained were 50 m2 g−1 and 40.77 Å, respectively. By varying the aging and reaction times, zeolite NaP1 with different surface areas could be created. Specifically, reducing the aging time and reaction time result in zeolite NaP1 with a lower surface area. The adsorption efficiency and adsorption capacity of the optimal synthesized zeolite NaP1 were 38.67% and 19.97 mg g−1, respectively, at pH 6.0, with an initial phosphate concentration of 100 mg L−1, an adsorbent dosage of 2 g L−1, and a contact time of 120 min. The data are well described under the Temkin and Redlich‐Peterson models, with the correlation coefficients of 0.991 and 0.995, respectively. The maximum adsorption capacity of the Langmuir model reached 19.053 mg g−1. CONCLUSION The main contribution of this work is the direct use of rice husk ash without pretreatment to generate high crystalline zeolite NaP1 in a shorter time. The phosphate ion removal efficiency by zeolite NaP1 may be further improved by functionalizing zeolite surfaces and expanding its other applications. © 2023 Society of Chemical Industry (SCI).

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Section: Resultsmentioning

confidence: 98%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluation of the potential removal of phosphate using rice husk ash‐derived zeolite NaP1

Tran‐Nguyen

Nguyen

et al. 2023

J of Chemical Tech & Biotech

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“…To explore the role of the intrinsic micropores of the zeolite 13X in the adsorption to DMP, MD simulation and calculation were performed. A zeolite 13X unit cell with the Si/Al ratio of 1.23 was obtained by randomly replacing Si by Al based on the Löwenstein rule since the adsorption properties of FAU zeolites cannot be affected by such an arrangement. − Its unit cell is cubic symmetry with a lattice parameter of 25.028 Å and α = β = γ = 90° at 20 °C Figures S6 and S7 show simulated structures of the unit cell and DMP, respectively.…”

Section: Resultsmentioning

confidence: 99%

Incorporation of ZnO Nanoislands in Nanoporous Zeolite 13X for the Adsorption of Molecular Contaminants in Outer Space

Gong

et al. 2023

ACS Appl. Nano Mater.

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Recently, zeolites have been selected as a potential adsorbent for capturing space molecular contaminants owing to their strong adsorption ability and extreme stability in a harsh environment. Considering the adsorption process in a vacuum environment, enhancement of the adsorption performance of the zeolites is required. Unfortunately, up to now, the improved adsorption behavior for the space molecular contaminants of the modified zeolite adsorbent under ultralow pressure has rarely been reported. Herein, a 13X/ZnO adsorbent was prepared by incorporating ZnO nanoislands into the nanoporous zeolite 13X via atomic layer deposition (ALD). It is found that a representative 13X/ZnO-50 exhibits an increased adsorption capacity toward dimethyl phthalate and the outgassing species of J133 adhesive even under the ultralow pressure of 10–5 Pa. This could be attributed to the synergistic effects of physical interactions and chemical adsorption associated with the unique cage structure of the zeolite and the incorporated ALD-grown ZnO nanoislands. This work provides a useful strategy for developing the adsorbents used in space molecular contamination control during space missions.

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Synthesis of zeolite from industrial wastes: a review on characterization and heavy metal and dye removal

Eren,

Türk,

Arslanoğlu

2024

Environ Sci Pollut Res

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Increasing world population, urbanization, and industrialization have led to an increase in demand in production and consumption, resulting in an increase in industrial solid wastes and pollutant levels in water. These two main consequences have become global problems. The high Si and Al content of solid wastes suggests that they can be used as raw materials for the synthesis of zeolites. In this context, when the literature studies conducted to obtain synthetic zeolites are evaluated, it is seen that hydrothermal synthesis method is generally used. In order to improve the performance of the hydrothermal synthesis method in terms of energy cost, synthesis time, and even product quality, additional methods such as alkaline fusion, ultrasonic effect, and microwave support have been developed. The zeolites synthesized by different techniques exhibit superior properties such as high surface area and well-defined pore sizes, thermal stability, high cation exchange capacity, high regeneration ability, and catalytic activity. Due to these specific properties, zeolites are recognized as one of the most effective methods for the removal of pollutants. The toxic properties of heavy metals and dyes in water and their carcinogenic effects in long-term exposure pose a serious risk to living organisms. Therefore, they should be treated at specified levels before discharge to the environment. In this review study, processes including different methods developed for the production of zeolites from industrial solid wastes were evaluated. Studies using synthetic zeolites for the removal of high levels of health and environmental risks such as heavy metals and dyes are reviewed. In addition, EPMA, SEM, EDX, FTIR, BET, AFM, and 29Si and 27Al NMR techniques, which are characterization methods of synthetic zeolites, are presented and the cation exchange capacity, thermodynamics of adsorption, effect of temperature, and pH are investigated. It is expected that energy consumption can be reduced by large-scale applications of alternative techniques developed for zeolite synthesis and their introduction into the industry. It is envisaged that zeolites synthesized by utilizing wastes will be effective in obtaining a green technology. The use of synthesized zeolites in a wide variety of applications, especially in environmental problems, holds great promise. Graphical Abstract

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Facile synthesis of zeolite NaX using rice husk ash without pretreatment

Cited by 19 publications

References 53 publications

Evaluation of the potential removal of phosphate using rice husk ash‐derived zeolite NaP1

Evaluation of the potential removal of phosphate using rice husk ash‐derived zeolite NaP1

Incorporation of ZnO Nanoislands in Nanoporous Zeolite 13X for the Adsorption of Molecular Contaminants in Outer Space

Synthesis of zeolite from industrial wastes: a review on characterization and heavy metal and dye removal

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