Sumari Sumari, Aman Santoso, Ririn Cahyanti, Yahmin Yahmin, Anugrah Ricky Wijaya
This study aimed to synthesize zeolite Na/H-X using silica extracted from the sand as a raw material. Silica extraction was carried out by the leaching method as a function of immersion time, followed by the sol-gel method. Extracted silica was characterized using XRF, XRD, and SEM. Synthesis of zeolite Na/H-X was conducted using the hydrothermal method by reacting NaOH, Al(OH)3, SiO2 with a mole composition ratio of 58: 58: 134. Synthesized zeolites were characterized using XRD, FTIR, XRF, SEM, and BET. The results showed that the optimal immersion time is 12 hours, where the highest silica yield obtained was 95.1 wt% and after treated with the sol-gel method was obtained 98 wt% yield of silica. The synthesized zeolite Na/H-X has the SiO2/Al2O3 molar ratios of 2.94 and 3.14. The existence of the peak of the FTIR spectrum at wavenumbers of 484, 538, 818, and 999 cm-1 indicated the presence of a specific zeolite functional group, which shows the zeolite X framework is formed. The SEM data presented the morphology of zeolite Na/H-X that crystal pieces were formed. The synthesized Na/H-X zeolites had a surface area of 14.229 and 25.147 m2/g respectively © 2020 Author(s).
Chemistry Department, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Jl. Semarang No. 5, Malang, 65145, Indonesia
