Adsorption of Thymol onto Natural Clays of Morocco: Kinetic and Isotherm Studies

The present work aims to study the affinity of a component of the thyme essential oil “thymol” to natural Moroccan clay “Rhassoul” using the adsorption technique. The physicochemical characterizations of the purified and modified clay were carried out by X-ray diffraction (XRD), Fourier transform in...

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Bibliographic Details
Published in:Journal of chemistry 2020, Vol.2020 (2020), p.1-10
Main Authors: Allaoui, Safae, Arhzaf, Said, Qabaqous, Omar, Hajjaj, Hassan, Naciri Bennani, Mohammed, Ziyat, Hamid, Mekdad, Soumiya
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Analysis
Cetyltrimethylammonium bromide
Clay
Diffraction
Essential oils
Fourier transforms
Infrared spectroscopy
Isotherms
Kinetics
Methylene blue
Oils & fats
Phenols
Quartz
Spectrum analysis
Surfactants
Thymol
X-rays
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Summary:The present work aims to study the affinity of a component of the thyme essential oil “thymol” to natural Moroccan clay “Rhassoul” using the adsorption technique. The physicochemical characterizations of the purified and modified clay were carried out by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), DTA/TGA, and SEM-EDX. Thymol adsorption tests on the purified Rhassoul (Rh-P) and the modified one by CTAB (Rh-CTAB) were followed by UV-visible spectroscopy. They show that the adsorption isotherms can be described by the Freundlich model and that the kinetics of adsorption is in accordance with the pseudo-second-order model for the two clays. Adsorption capacities obtained were of the order of 6 mg/g for the purified Rhassoul and 16 mg/g for the modified Rhassoul by cetyltrimethylammonium bromide (CTAB). These values show that the modified Rhassoul has a better adsorption capacity compared to the purified Rhassoul.
ISSN:2090-9063
2090-9071
DOI:10.1155/2020/4926809