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Preparation of high purity silica originated from rice husks by chemically removing metallic impurities

Title
Preparation of high purity silica originated from rice husks by chemically removing metallic impurities
Author
상병인
Keywords
Rice husk; Biosilica; Chemical treatment; Ionic liquid; Bioconversion
Issue Date
2017-06
Publisher
ELSEVIER SCIENCE INC
Citation
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, v. 50, page. 79-85
Abstract
Chemical treatments were used to synthesize high-purity silica from rice husk. A comparative study was carried out by using four chemicals: sulfuric acid, hydrogen chloride, oxalic acid, and ionic liquid (1-butyl-3-methylimidazolium hydrogen sulfate). The ash content significantly increased in sulfuric-acid and the ionic liquid treatments with the removal of both cellulose and hemicellulose. Drastic increases of silica purity were observed in samples treated with sulfuric acid and the ionic liquid at 99.6% and 99.5%, respectively. Furthermore, the ionic liquid treatment increased the surface area and pore volume by 1.9 times and 2.4 times, respectively, with respect to the sample not subjected to chemical treatment. (C) 2017 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S1226086X17300497?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/114374
ISBN
10.1016/j.jiec.2017.01.033
ISSN
1226-086X; 1876-794X
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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