Chemisorption of methylene blue by kaolinite
- 9 July 1967
- journal article
- Published by Mineralogical Society in Clay Minerals
- Vol. 7 (1) , 19-31
- https://doi.org/10.1180/claymin.1967.007.1.02
Abstract
The chemisorption of methylene blue by kaolinite crystals increased as the aqueous suspensions changed from acid to alkaline because, at high pH values, not only the basal pinacoids but the edge-faces were negatively charged. The inability to calculate acceptable specific surfaces or cation exchange capacities from the chemisorption data is discussed, with special reference to the orientation of adsorbed dye cations, the covering of more than one exchange site by a monomer or polymer, the different concentrations of exchange sites on the basal pinacoids and edge-faces respectively, the possibility that such sites occur on the tetrahedral rather than on the octahedral basal pinacoid, and the incomplete replacement of inorganic cations.Keywords
This publication has 29 references indexed in Scilit:
- Interrelationships of Physical and Chemical Properties of KaolinitesClays and Clay Minerals, 1966
- Repulsion of chloride ions by negatively charged clay surfaces. Part 1.—Monovalent cation Fithian illitesTransactions of the Faraday Society, 1965
- Wettability of Kaolinite Treated with Ammonia. Methylanline, Ethylamine. or Their Corresponding CationsJournal of the American Ceramic Society, 1964
- The Specific Surface Areas of MontmorillonitesClay Minerals, 1964
- ON CATION-EXCHANGE STOICHIOMETRYSoil Science, 1963
- Spatial Relations Between Air Bubbles and Flocculated Kaolinite and DickiteClays and clay minerals (National Conference on Clays and Clay Minerals), 1963
- Negative and Positive Adsorption of Chloride by KaoliniteNature, 1960
- Further Correlations of Kaolinite Crystallinity with Chemical and Physical PropertiesClays and clay minerals (National Conference on Clays and Clay Minerals), 1959
- The electrical double layer of oxidic substances especially in non‐aqueous mediaRecueil des Travaux Chimiques des Pays-Bas, 1941
- The crystal structure of methylene blueJournal of the Society of Chemical Industry, 1935