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Chlorophyll adsorption on acid‐activated clay
Author(s) -
Güler Çetin,
Tunç Fatma
Publication year - 1992
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/bf02636350
Subject(s) - adsorption , montmorillonite , chemistry , chlorophyll , infrared spectroscopy , thermogravimetry , clay minerals , chlorophyll a , fourier transform infrared spectroscopy , infrared , inorganic chemistry , nuclear chemistry , mineralogy , chemical engineering , organic chemistry , biochemistry , physics , optics , engineering
An acid‐activated clay (Çanakkale montmorillonite from Turkey) was used to adsorb chlorophyll from hexane solutions. The phenomenon seems to be mainly driven by the interaction of chlorophyll with acid sites. The adsorption of chlorophyll on Brönsted acid sites was indicated by a characteristic infrared band for the ‐OH group at 3671 cm −1 . The variations in the structure of clay mineral and chlorophyll during adsorption have been examined by differential thermal analysis, thermogravimetry and infrared spectroscopy of the activated clay before and after adsorption of chlorophyll. Oxidation of adsorbed chlorophyll was completed at quite a high temperature.