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β‐Carotene adsorption on acid‐activated montmorillonite
Author(s) -
Sarier N.,
Güler Ç.
Publication year - 1988
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02542530
Subject(s) - montmorillonite , adsorption , chemisorption , chemistry , carotene , benzene , titration , langmuir adsorption model , inorganic chemistry , langmuir , nuclear chemistry , organic chemistry
The adsorption of β‐carotene from solution in benzene on acid‐activated Canakkale montmorillonite of Turkey has been investigated. The adsorption isotherm had two steps. The first step was of the Langmuir type, and the isosteric heat of adsorption corresponding to this step was equal to −193.514 kJ/mol. The decrease in the total number of acid sites of the clay surface was determined to be 0.45×10 −4 mol/g clay by nonaqueous titration with diethylamine. The phenomenon seems to be mainly a chemisorption stemming from the interaction of β‐carotene with acid sites. Also, the activated clay acts as an oxidation catalyst on the β‐carotene left in the solution.