Extraction Of Silica From Rice Husk Via Acid Leaching Treatment

Abstract

Rice husk has been used as a thermal energy source for electricity generation, resulting in the formation of silica from rice husk as a by-product. The purpose of this research is to analyse the effect of acid concentration through the extract of silica in the rice husk via acid leaching treatment, due to silica as a raw material that can be apply in industrial. Acid leaching treatment was implemented to extract the silica and organic in rice husk. Besides, the parameters such as concentration of acid and leaching time of organic and inorganic acid during leaching method were also compared. In this research, hydrochloric acid (HCL) and citric acid (C6H8O7) were used for production of silica from rice husk. Various samples were characterized using Fourier Emission Scanning Electron microscopy (FESEM), X-ray diffraction (XRD) and X-ray fluorescence (XRF). The result indicates that highest percentage silica of rice husk after leaching was on 1.0M at 60 minutes and has an amorphous structure.