Characterization and bleaching properties of acid-leached montmorillonite

✍ Scribed by Jadambaa Temuujin; Mamoru Senna; Tsedev Jadambaa; Dashdendev Burmaa; Shaarii Erdenechimeg; Kenneth JD MacKenzie

• Publisher: Wiley (John Wiley & Sons)
• Year: 2006
• Tongue: English
• Weight: 153 KB
• Volume: 81
• Category: Article
• ISSN: 0268-2575
• DOI: 10.1002/jctb.1469

✦ Synopsis

Abstract

After being subjected to preliminary purification, montmorillonite clay was leached with varying concentrations of sulfuric acid (0.5–2 mol L^−1^) at 90 °C for varying times (0.5–4 h). Acid leaching causes partial amorphization of the montmorillonite and increases its specific surface area by a factor of 3 (from 49.1 to 157 m^2^ g^−1^). The bleaching efficiency for Mongolian mare's milk oil, as judged by light absorbance measurements at 400 nm, was increased from 9.5% for the unleached clay to 93.8% for clay leached with 2 mol L^−1^ H~2~SO~4~ for 4 h. Copyright © 2006 Society of Chemical Industry