Open AccessImprovement of the characteristics of silica particles extracted from rice husks using chemical-physical method
Author(s) -
Kendri Wahyuningsih,
Sri Yuliani,
Wahyu Diono,
Hoerudin
Publication year - 2022
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2190/1/012011
Subject(s) - husk , sodium hydroxide , pyrolysis , leaching (pedology) , materials science , filler (materials) , extraction (chemistry) , silica gel , nuclear chemistry , natural rubber , hydrochloric acid , pulp and paper industry , chemical engineering , chemistry , composite material , chromatography , organic chemistry , metallurgy , environmental science , botany , soil science , engineering , soil water , biology
Silica (SiO 2 ) can be extracted from rice husks and has biodegradable properties. However, the rice husk extraction process using the sol-gel technique generates low-purity silica, making them non-compliant as a filler material on the rubber finished goods industry. This study aimed to improve the characteristics of silica particles extracted from rice husks using the leaching-pyrolysis technique compared to the sol-gel technique. Silica was extracted from rice husks using 1.0 N sodium hydroxide and hydrochloric acid solvent (with concentrations of 0.4 N, 1.0 N, and 2.0 N). The pyrolysis was then conducted at 600 °C for 6 hours. The results showed that the leaching-pyrolysis technique was more effective than the sol-gel technique in improving silica particle characteristics. X-ray fluorescence analysis showed that the SiO 2 content increased from 91.00 % to 96.82 %. Likewise, the percentage of amorphous by X-ray diffraction analysis and specific surface area by the Brunauer Emmett-Teller method also increased, namely from 48.20 % to 53.97 % and from 96.486 m 2 /g to 240.427 m 2 /g, respectively. Therefore, silica from rice husks with these characteristics is applicable as a filler material that is environmentally friendly and renewable.