Synthesis of amorphous silica (SiO2) from natural sand minerals using the precipitation method

Amorphous silica (SiO2) made from natural sand has been synthesized through the precipitation method. The natural sand used comes from the coast of Bangka Belitung and the Lumajang river. The process parameters in this amorphous silica study were variations in NaOH concentrations of 6M, 7M and 8M. C...

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Bibliographic Details
Main Authors: Siswanto, Supardi, Adri, Nurhaeni, Alifa
Format: Conference Proceeding
Language:English
Subjects:
Process parameters
Sand
Silicon dioxide
X-ray diffraction
Online Access:Get full text
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Summary:Amorphous silica (SiO2) made from natural sand has been synthesized through the precipitation method. The natural sand used comes from the coast of Bangka Belitung and the Lumajang river. The process parameters in this amorphous silica study were variations in NaOH concentrations of 6M, 7M and 8M. Characterization of the formation of amorphous silica includes XRD and XRF tests. Preliminary analysis using XRD shows that both types of sand are in the quartz phase. After extraction using NaOH and 2M HCl there was a change in the distribution angle of the two types of samples. The results of characterization and XRD analysis showed that the silica formed was in an amorphous phase. The highest purity of silica was produced at a concentration of 8M NaOH with an average percentage of 96.7% for Bangka Belitung beach sand and 96.2% for Lumajang river sand.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0211285