Chlorophyll adsorption on acid‐activated clay
Articles > Article · 1992
Authors: Çetin Güler, Fatma Tunç
Journal of the American Oil Chemists' Society, International, 1992, vol 69, pp 948-950
DOI: 10.1007/bf02636350
Summary
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.