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Sep 26, 2025
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Nov 14, 2025
Published
Dec 8, 2025
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Abstract

The synthesis of sodium aluminate from aluminum and sodium hydroxide was successfully conducted to optimize its potential as a precursor for zeolite production. Aluminum was reacted with NaOH solution under continuous stirring for five hours, with variations in pH and Al-to-NaOH molar ratio to determine optimal synthesis conditions. The highest aluminum conversion (94.33%) was achieved at pH 13.6 and an Al-to-NaOH molar ratio of 1:4. Fourier-transform infrared (FTIR) spectroscopy confirmed the formation of tetrahedral [AlO₄]⁻ units through characteristic aluminate vibrational bands at 624 and 727 cm⁻¹. X-ray diffraction (XRD) analysis revealed sharp reflections at 2θ ≈ 34.8°, corresponding to crystalline NaAlO₂ (JCPDS No. 33-1200), indicating high crystallinity and phase purity. Scanning electron microscopy coupled with energy-dispersive X-ray (SEM–EDX) analysis showed irregular plate-like crystalline particles with a near-stoichiometric Na:Al ratio (~1:1), confirming compositional homogeneity. Overall, optimized alkalinity and stoichiometry were found to be critical for producing highly crystalline and compositionally pure sodium aluminate, suggesting its suitability as a high-quality, environmentally friendly precursor for zeolite synthesis.

Keywords

Sodium aluminate, synthesis, aluminum, sodium hydroxide characterization

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1.
Dinalia D, Syamsi Aini, Jon Efendi. Synthesis and Characterization of Sodium Aluminate from Aluminum and Sodium Hydroxide . EKSAKTA [Internet]. 2025 Dec. 8 [cited 2025 Dec. 16];26(04):500-15. Available from: https://eksakta.ppj.unp.ac.id/index.php/eksakta/article/view/627

References

  1. [1] de Jesus, J. O. N., Medeiros, D. L., Esquerre, K. P. O., Sahin, O., & de Araujo, W. C. (2024). Water treatment with aluminum sulfate and tanin-based biocoagulant in an oil refinery: the technical, environmental, and economic performance. Sustainability, 16(3), 1191.
  2. [2] Adesanya, E., Perumal, P., Luukkonen, T., Yliniemi, J., Ohenoja, K., Kinnunen, P., & Illikainen, M. (2021). Opportunities to improve sustainability of alkali-activated materials: A review of side-stream based activators. Journal of Cleaner Production, 286, 125558.
  3. [3] Ri, J. H., Pak, Y. S., & Yun, K. S. (2020). Preparation Of Cement Grinding Aids Based On Alumina Compounds. Bilimsel Madencilik Dergisi, 59(2), 123-129.
  4. [4] Ming, X., Li, Q., & Jiang, W. (2021). Application of Aluminum Sulfate in the Treatment of Papermaking White Water. BioResources, 16(1).
  5. [5] Damjanovic, V., Filipovic, R., Obrenovic, Z., Perusic, M., Kostic, D., Smiljanic, S., & Stopic, S. (2023). Influence of process parameters in three-stage purification of aluminate solution and aluminum hydroxide. Metals, 13(11), 1816.
  6. [6] Rozhkovskaya, A., Rajapakse, J., & Millar, G. J. (2021). Optimisation of zeolite LTA synthesis from alum sludge and the influence of the sludge source. Journal of Environmental Sciences, 99, 130-142.
  7. [7] Awala, H., Kunjir, S. M., Vicente, A., Gilson, J. P., Valtchev, V., Seblani, H., ... & Mintova, S. (2021). Crystallization pathway from a highly viscous colloidal suspension to ultra-small FAU zeolite nanocrystals. Journal of Materials Chemistry A, 9(32), 17492-17501.
  8. [8] Zhao, Y., Zheng, Y., Peng, Y., He, H., & Sun, Z. (2021). Characteristics of poly-silicate aluminum sulfate prepared by sol method and its application in Congo red dye wastewater treatment. RSC advances, 11(60), 38208-38218.
  9. [9] U. Medhat, T. A. M. Abd El Razek, and A. M. Abd Elbasier. (2024). Production of Sodium Silicate and Sodium Aluminate From Alum Production Waste, J. Environ. Sci., vol. 53, no. 3.
  10. [10] Cheng, L., Wang, Y., Wang, B., Qi, T., Liu, G., Zhou, Q., ... & Li, X. (2022). Phase transformation of desilication products in red mud dealkalization process. Journal of Sustainable Metallurgy, 8(1), 541-550.
  11. [11] Liu, S., Liu, Z., Yan, H., Li, M., & Xia, C. (2023). Desulfurization by Adding Sodium Nitrate in the Production of Alumina from High-Sulfur Bauxite. JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 75(5).
  12. [12] Yoldi, M., Fuentes-Ordoñez, E. G., Korili, S. A., & Gil, A. (2019). Efficient recovery of aluminum from saline slag wastes. Minerals Engineering, 140, 105884.
  13. [13] Graham, T. R., Hu, J. Z., Jaegers, N. R., Zhang, X., Pearce, C. I., & Rosso, K. M. (2022). An amorphous sodium aluminate hydrate phase mediates aluminum coordination changes in highly alkaline sodium hydroxide solutions. Inorganic Chemistry Frontiers, 9(24), 6344-6357.
  14. [14] Ibsaine, F., Azizi, D., Dionne, J., Tran, L. H., Coudert, L., Pasquier, L. C., & Blais, J. F. (2023). Conversion of aluminosilicate residue generated from lithium extraction process to NaX zeolite. Minerals, 13(12), 1467.
  15. [15] Yoldi, M., Fuentes-Ordoñez, E. G., Korili, S. A., & Gil, A. (2020). Zeolite synthesis from aluminum saline slag waste. Powder Technology, 366, 175-184.
  16. [16] Tietz, T., Lenzner, A., Kolbaum, A. E., Zellmer, S., Riebeling, C., Gürtler, R., ... & Hensel, A. (2019). Aggregated aluminium exposure: risk assessment for the general population. Archives of toxicology, 93(12), 3503-3521.
  17. [17] Lamparelli, E. P., Marino, M., Szychlinska, M. A., Della Rocca, N., Ciardulli, M. C., Scala, P., ... & Santoro, A. (2023). The other side of plastics: Bioplastic-based nanoparticles for drug delivery systems in the brain. Pharmaceutics, 15(11), 2549.
  18. [18] Sanders, R. E., & Marshall, G. J. (2023). Aluminum: Technology, Industry, and Applications. ASM International.
  19. [19] Harmaji, A., Jafari, R., & Simard, G. (2024). Valorization of residue from aluminum industries: a review. Materials, 17(21), 5152.
  20. [20] Torrez-Herrera, J. J., Fuentes-Ordoñez, E. G., Korili, S. A., & Gil, A. (2021). Evidence for the synthesis of La-hexaaluminate from aluminum-containing saline slag wastes: Correction of structural defects and phase purification at low temperature. Powder Technology, 377, 80-88.
  21. [21] Liu, W., Pouvreau, M., Stack, A. G., Yang, X., & Clark, A. E. (2022). Concentration dependent interfacial chemistry of the NaOH (aq): gibbsite interface. Physical Chemistry Chemical Physics, 24(35), 20998-21008.
  22. [22] Graham, T. R., Gorniak, R., Dembowski, M., Zhang, X., Clark, S. B., Pearce, C. I., ... & Rosso, K. M. (2020). Solid-state recrystallization pathways of sodium aluminate hydroxy hydrates. Inorganic Chemistry, 59(10), 6857-6865.
  23. [23] Hausmann, J. N., Traynor, B., Myers, R. J., Driess, M., & Menezes, P. W. (2021). The pH of aqueous NaOH/KOH solutions: a critical and non-trivial parameter for electrocatalysis. ACS Energy Letters, 6(10), 3567-3571.
  24. [24] Nienhuis, E. T., Pouvreau, M., Graham, T. R., Prange, M. P., Page, K., Loring, J. S., ... & Wang, H. W. (2022). Structure and reactivity of sodium aluminate complexes in alkaline solutions. Journal of Molecular Liquids, 367, 120379.
  25. [25] Takei, S., Kinoshita, H., & Murase, T. (2025). Application of Energy-Dispersive X-Ray Fluorescence Spectrometry for Examination of Foreign Bodies in Forensic Practice.
  26. [26] A. S. Deepi, S. D. Priya, C. E. F. Christy, and A. S. Nesaraj. (2022). Facile Synthesis, Analysis of Physico-Chemical Properties and Tape Casting of Al2O3 Nanoparticles, Asian J. Chem., vol. 34, no. 10, pp. 2651–2656.
  27. [27] Marinos, D., Kotsanis, D., Alexandri, A., Balomenos, E., & Panias, D. (2021). Carbonation of sodium aluminate/sodium carbonate solutions for precipitation of alumina hydrates—avoiding dawsonite formation. Crystals, 11(7), 836.
  28. [28] Fadhilah, N., Muharja, M., Risanti, D. D., Wahyuono, R. A., Satrio, D., Khamil, A. I., & Fadilah, S. N. (2023). Kinetic study of the aluminum–water reaction using NaOH/NaAlO2 catalyst for hydrogen production from aluminum cans waste. Bulletin of Chemical Reaction Engineering & Catalysis, 18(4), 615-626.
  29. [29] Pedroza-Solis, C. D., De la Rosa, J. R., Lucio-Ortiz, C. J., Del Río, D. A. D. H., González-Casamachin, D. A., García, T. C. H., ... & Rangel, L. S. (2021). Thermocatalytic degradation of lignin monomer coniferyl aldehyde by aluminum–boron oxide catalysts. Comptes Rendus. Chimie, 24(S1), 1-17.
  30. [30] Mashkovtsev, M., Tarasova, N., Baksheev, E., Rychkov, V., Zhuravlev, N., Solodovnikova, P., & Galiaskarova, M. (2023). Spectroscopic study of five-coordinated thermal treated alumina formation: FTIR and NMR applying. International Journal of Molecular Sciences, 24(6), 5151.
  31. [31] Dembowski, M., Prange, M. P., Pouvreau, M., Graham, T. R., Bowden, M. E., Schenter, G. K., ... & Pearce, C. I. (2020). Inference of principal species in caustic aluminate solutions through solid-state spectroscopic characterization. Dalton Transactions, 49(18), 5869-5880.
  32. [32] Kabekkodu, S. N., Dosen, A., & Blanton, T. N. (2024). 5+: a comprehensive powder diffraction file™ for materials characterization. Powder Diffraction, 39(2), 47-59.
  33. [33] Proskurnina, N. V., Voronin, V. I., Shekhtman, G. S., & Kabanova, N. A. (2020). Crystal structure of NaFeO2 and NaAlO2 and their correlation with ionic conductivity. Ionics, 26(6), 2917-2926.
  34. [34] Durai, L., Gopalakrishnan, A., & Badhulika, S. (2022). Solid-state synthesis of β-NaAlO 2 nanoflakes as an anode material for high-performance sodium-ion batteries. Materials Chemistry Frontiers, 6(19), 2913-2920.