Sorption of rhodamine B by montmorillonite and laponite

Zvi Grauer*, Adina B. Malter, Shmuel Yariv, David Avnir

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

52 Scopus citations

Abstract

The adsorption of rhodamine B by montmorillonite and laponite has been studied by visible (absorption and emission) and infrared spectroscopy, and X-ray diffraction. The dye is adsorbed as a uni-charged cation by a mechanism of cation exchange. The amount of this cation and consequently the degree of adsorption depend on pH and on the dye concentration. The adsorbed cationic dye is located in the interlayer space. Due to steric hindrance no π interactions occur between the clay and the aromatic compound and no metachromasy is observed.

Original languageEnglish
Pages (from-to)41-65
Number of pages25
JournalColloids and Surfaces
Volume25
Issue number1
DOIs
StatePublished - Jul 1987

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