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Characterization and bleaching properties of acid‐leached montmorillonite
Author(s) -
Temuujin Jadambaa,
Senna Mamoru,
Jadambaa Tsedev,
Burmaa Dashdendev,
Erdenechimeg Shaarii,
MacKenzie Kenneth JD
Publication year - 2006
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.1469
Subject(s) - montmorillonite , sulfuric acid , leaching (pedology) , absorbance , chemistry , clay minerals , dissolution , nuclear chemistry , inorganic chemistry , mineralogy , organic chemistry , chromatography , geology , soil science , soil water
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