Open AccessAdsorption of Thymol onto Natural Clays of Morocco: Kinetic and Isotherm Studies
Author(s) -
Hamid Ziyat,
Mohammed Naciri Bennani,
Hassan Hajjaj,
Omar Qabaqous,
Said Arhzaf,
Soumiya Mekdad,
Safae Allaoui
Publication year - 2020
Publication title -
journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.436
H-Index - 50
eISSN - 2090-9063
pISSN - 2090-9071
DOI - 10.1155/2020/4926809
Subject(s) - chemistry , adsorption , freundlich equation , thymol , fourier transform infrared spectroscopy , bromide , nuclear chemistry , kinetics , infrared spectroscopy , chromatography , inorganic chemistry , essential oil , chemical engineering , organic chemistry , physics , quantum mechanics , engineering
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.