Chlorophyll adsorption on acid-activated clay |
| |
Authors: | Çetin Güler Fatma Tunç |
| |
Affiliation: | (1) Faculty of Science, Chemistry Department, Ege University, Izmir, Turkey |
| |
Abstract: | 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. |
| |
Keywords: | Activated clay adsorption Br?nsted acid sites chlorophyll decolorization differential thermal analysis infrared Lewis acid sites montmorillonite thermogravity |
本文献已被 SpringerLink 等数据库收录! |