Identification and Purification of Nyalo River Silica Sand as Raw Material for the Synthesis of Sodium Silicate

2nd International Conference on Mathematics, Science, Education and Technology

数学;自然科学;教育

Aini, S.^1 ; Nizar, U.K.^1 ; Amelia Nst, A.^1 ; Efendi, J.^1

Chemistry Department, Faculty of Mathematics and Science, State University of Padang, Indonesia^1

关键词: High potency;    Qualitative and quantitative analysis;    Sodium silicate;    X ray fluorescence;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/335/1/012025/pdf
DOI  :  10.1088/1757-899X/335/1/012025

来源: IOP

【 摘 要 】

This research is on identification and purification of silica sand from Nyalo River. It will be used as a raw material for synthesis of sodium silicate. Silica sand was separated from clay by washing it with water, and then the existing alumina and iron oxide were removed by soaking the silica sand with 1 M HNO3solution. Qualitative and quantitative analysis of the silica sand with X-ray diffraction and X-ray fluorescence revealed that, silica sand existed in quartz form and contained a small amount of impurity oxide such as Al2O3, K2O, MgO, CaO, Fe2O3with percentage below the minimum threshold. The percentages of silica were 80.59% before purification. After three purificationsteps the silica percentage become 98.38%. It exceedsthe minimum threshold of silica percentage for industry.So, the silica sand from Nyalo River has high potency as a raw material for sodium silicate synthesizing.