Reducing impurities of silica sand by one step and two step leaching

Eni Febriana, Wahyu Mayangsari, Agus Budi Prasetyo, Januar Irawan, Eko Sulistiyono, Murni Handayani, F. Firdiyono, Johny Wahyuadi Soedarsono

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


The demand of high purity quartz sand is increasing for various needs such as solar cells, semiconductor chips, optical fibers, catalytic chemicals, and flat panel displays. One of the most widely used processes for this purpose is the one step or two step leaching method. This study investigated purification process to increase the silica content of quartz sand using the one step leaching method using dilute hydrochloric acid and comparing to two step leaching using dilute hydrochloric acid and sodium bicarbonate as solvent. The effectiveness of the process of removing impurities from quartz sand was studied based on the results of analysis using XRF, XRD, and SEM-EDX. The results showed that two step leaching with dilute HCl and Na2CO3 was effective in reducing the level of impurities in quartz sand after the one step leaching using very low concentrations of hydrochloric acid. Dilute Na2CO3 can improve impurities removal. SiO2 concentration increased from 96.3% in raw material to 98.3 and 98.8% after one-step and two-step leaching, respectively. Effectiveness of removing impurities increased from 54% by one step leaching method to 67.6% by two step leaching method.

Original languageEnglish
Title of host publicationAIP Conference Proceedings
EditorsSigit Dwi Yudanto, Ari Yustisia Akbar, Fendy Rokhmanto, Made Subekti Dwijaya, Muhammad Yunan Hasbi, Wahyu Mayangsari, Yudi Nugraha Thaha
PublisherAmerican Institute of Physics
ISBN (Electronic)9780735448124
Publication statusPublished - 28 Feb 2024
Event5th International Seminar on Metallurgy and Materials, ISMM 2022 - Tangerang Selatan, Indonesia
Duration: 22 Nov 202223 Nov 2022

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference5th International Seminar on Metallurgy and Materials, ISMM 2022
CityTangerang Selatan


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