Kinetics and Mechanism of the Adsorption of Methylene Blue from Aqueous Solution onto Turkish Green Clay
Özkan Demirbaş, Mehmet Salih Nas
Archives of Current Research International · pp. 1–10 · Published 22 Dec 2016
10.9734/ACRI/2016/30677Abstract
In this study, the thermodynamic parameters and adsorption kinetics of methylene blue (MB) onto Turkish green clay (TGC) from Gurpinar in Van, Turkey were investigated in aqueous solution through batch adsorption experiment. Turkish green clay was used in this study for the first time in the literature for this purpose. Adsorption studies were carried out to investigate the effect of experimental factors such as contact time (1-120 min), initial dye concentration (0.5-2.0x10-5 M), temperature (298-328 K) and pH (5.5-9) on the adsorption of MB. The Turkish green clay (TGC), methylene blue (MB) and MB adsorbed Turkish green clay (MB-TGC) were characterized by SEM, FTIR-ATR, TGA and BET surface area analysis. Three different kinetic models, pseudo-first-order, pseudo-second-order and intraparticle diffusion were used to fit the kinetics data. The pseudo-second-order model best described the experimental data. However, the adsorption of MB was more suitable to be controlled by an intra-particle diffusion mechanism. The thermodynamic activation parameters, such as enthalpy, entropy and Gibbs free energy were determined. The maximum adsorption capacity of TGC was found to be 195.74 mg/g (or 0.612 mmol/g) at pH 9, 298 K and 2.0x10-5 M, initial MB concentration of solution. These results showed that MB can be effectively removed from aqueous solution employing TGC as an adsorbent.
Cited by 12
M. H. Çalımlı · International Journal of Environmental Science and Technology · 2020
Özkan Demirbaş, Mehmet Harbi Çalımlı, Esra Kuyuldar · Applications of Ion Exchange Materials in Biomedical Industries · 2019
Mohamed E. Mahmoud, Rehab M. El-Sharkawy, Ghada A.A. Ibrahim · Journal of Molecular Liquids · 2022
Mehmet Salih NAS · Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi · 2019
Fatih Şen, Özkan Demirbaş, Mehmet Harbi Çalımlı · Applied Water Science · 2018
Züleyha Bingül Reçber, Hakan Burhan, Ramazan Bayat · Environmental Pollution · 2022
Mehmet Harbi ÇALIMLI · Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi · 2021
Mehmet Salih Nas, Esra Kuyuldar, Buse Demirkan · Scientific Reports · 2019
Mehmet Harbi Calimli, Mehmet Salih Nas, Hakan Burhan · Journal of Molecular Liquids · 2020
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