The Analysis of Silica From Rice Husks Siam Unus from South Kalimantan

• Main Authors: Dwi Rasy Mujiyanti, Dahlena Ariyani, Muna Lisa
• Format: Article
• Language: English
• Published: Department of Chemistry, Pattimura University 2021-09-01
• Series: Indonesian Journal of Chemical Research
• Subjects: Siam Unus rice husk ash, extraction, silica, FTIR, XRF.
• Online Access: https://ojs3.unpatti.ac.id/index.php/ijcr/article/view/3460

Research on analysis of rice husk content of Siam Unus with various NaOH concentrations (1.0 M; 1.5 M; 2.0 M; 2.5 M; 3.0 M) has been done. This study aims to obtain data on the effect of variations in NaOH concentration on the purity of the silica extract from Siam Unus rice husks and silica characterization of Siam Unus rice husks using Fourier Transform Infra-Red (FTIR) and X-ray fluorescence spectrometry (XRF). The results showed that the combustion of rice husks at 200 °C as optimum temperature for 1 hour followed by combustion at 600 °C for 4 hours produces grayish-white rice husks with a yield is 20.70%. Silica functional group characterization showed that silanol (Si-OH) and siloxane (Si-O-Si) as dominant functional groups. The result of composition characterization using XRF showed that SiO2 as the dominant compound with the highest percentage of SiO2 is 1.5 M NaOH extract at 42.80%.