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All Journal JURNAL KIMIA SAINS DAN APLIKASI
Hasanah, Awwali Maf’ulah
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Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering

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Synthesis of NaX Zeolite from Blitar Kaolin via Hydrothermal and Sonication Methods with Alkali Fusion Pre-treatment Khalifah, Susi Nurul; Fiddaroini, Saidun; Arifah, Aminatus; Hasanah, Awwali Maf’ulah; Prasetyo, Anton
Jurnal Kimia Sains dan Aplikasi Vol 28, No 5 (2025): Volume 28 Issue 5 Year 2025
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.28.5.274-282

Abstract

NaX zeolite, widely recognized for its applications in cation exchange, adsorption, and catalysis, was successfully synthesized from Blitar natural kaolin using an alkali fusion pre-treatment, followed by two comparative synthesis methods: hydrothermal and sonication. The synthesis was conducted at 70°C for 2 and 4 hours. Optimal conditions were achieved with a NaOH/kaolin weight ratio of 2.0 and a synthesis gel composition of 10SiO2: 1Al2O3: 6Na2O: 180H2O (molar ratio). X-ray diffraction (XRD) confirmed the transformation of natural kaolin into sodium silicate, with sonication yielding phase-pure NaX zeolite, while the hydrothermal method resulted in NaX with sodalite impurities. Fourier-transform infrared (FTIR) spectroscopy identified characteristic NaX vibrations, and scanning electron microscopy (SEM) revealed cubic-shaped particles in the sonication method. The sonication process accelerated crystallization, producing higher-purity zeolite in shorter times than hydrothermal synthesis. These findings emphasize the effectiveness of sonication in enhancing the crystallinity and purity of NaX zeolite, offering a robust, time-efficient alternative for large-scale zeolite production.
Co-Authors Anton Prasetyo Arifah, Aminatus Fiddaroini, Saidun Susi Nurul Khalifah