The Effect of Variation Concentration Sodium Hydroxide (NaOH) on the Structure of Calcium Carbonate (CaCO3) Based on Natural Sand

Linda Silvia; Amilia Amilia; Lana Awathifi; Mashuri Mashuri; Zaenal Arifin; Bintoro Anang Subagyo; Heru Sukamto; Sri Yani Purwaningsih; Yanurita Dwi Hapsari; Sudarsono Sudarsono; Mariyanto Mariyanto; Malik Anjelh Baqiya; Yoyok Cahyono; Mochammad Zainuri

doi:10.4028/www.scientific.net/KEM.860.267

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 860The Effect of Variation Concentration Sodium...

The Effect of Variation Concentration Sodium Hydroxide (NaOH) on the Structure of Calcium Carbonate (CaCO₃) Based on Natural Sand

Abstract:

Utilization of abundant natural resources has been an important issue in recent years. CaCO₃ was successfully prepared from natural sand by purification bubbling methods with flowing CO₂ gas into an aqueous Ca(OH)₂ medium with NaOH as catalyst. In the experimental set-up, natural sand was dissolved with different NaOH concentrations of 5, 6, and 7 M, respectively. In the carbonation process, room temperature is used as reaction temperature, while CO₂ gas flow rate was carried out at 5 SCFH (Square Cubic Feet per Hour) and the speed of stirring was kept constant. The reaction was occurred around 5 minutes to produce precipitation of CaCO₃. The influences of reaction parameters such as the various concentrations of NaOH were studied by using X-ray fluorescence spectrometer (XRF), X-ray powder diffraction (XRD), Particle size analyzer (PSA), and Scanning Electron Microscopy (SEM) to investigate the element composition, crystal structure, size of particles, and morphology of particles, respectively. The results showed that NaOH concentration effected not only on the phases of CaCO₃ but also on the microstructure and morphology of CaCO₃. Calcite and vaterite phases are observed which have a rhombic and spherical morphology in micro-scale, respectively.

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Physics Symposium: Key Research in Materials Science

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Key Engineering Materials (Volume 860)

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267-273

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.860.267

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Online since:

August 2020

Authors:

Linda Silvia*, Amilia Amilia, Lana Awathifi, Mashuri Mashuri, Zaenal Arifin, Bintoro Anang Subagyo, Heru Sukamto, Sri Yani Purwaningsih, Yanurita Dwi Hapsari, Sudarsono Sudarsono, Mariyanto Mariyanto, Malik Anjelh Baqiya, Yoyok Cahyono, Mochammad Zainuri

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Bubbling, Calcium Carbonate, NaOH, Sand

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