Removal of Methylene Blue Dye from Aqueous Solutions Using Carboxymethyl-β-Cyclodextrin-Fe3O4 Nanocomposite: Thermodynamics and Kinetics of Adsorption Process
Yazarlar (4)
Hediyeh Sadat Ghazimokri Islamic Azad University, Science And Research Branch, İran
Hossein Aghaie Islamic Azad University, Science And Research Branch, İran
Prof. Dr. Majıd MONAJJEMI Islamic Azad University, Central Tehran Branch, İran
Mohammad Reza Gholami Sharif University Of Technology, İran
Makale Türü Özgün Makale (ESCI dergilerinde yayınlanan tam makale)
Dergi Adı Russian Journal of Physical Chemistry A
Dergi ISSN 0036-0244 Wos Dergi Scopus Dergi
Makale Dili İngilizce Basım Tarihi 02-2022
Cilt / Sayı / Sayfa 96 / 2 / 371–380 DOI 10.1134/S0036024422020108
Özet
Abstract: The applicability of the synthesized carboxymethyl-β-cyclodextrin-Fe3O4 nanocomposite (CM‑β-CD-Fe3O4NPs) as a novel adsorbent for eliminating Methylene blue dye (MB) from aqueous media was investigated. Various techniques including Brunauer Emmett Teller analysis (BET), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) have been used to characterize this novel adsorbent. The effect of initial concentration (C0), pH, adsorbent dosage (dose), contact time (tc), and temperature (T, K) on the removal percentage (Ad%) of MB dye onto CM-β-CD-Fe3O4NPs was studied, and the optimum value of each factor was determined (pH 6.0, dose = 0.20 g, tc = 45.0 min, and T = 298.0 K). Several isotherm models, such as Langmuir, Freundlich and Redlich–Peterson models were used to represent the adsorption experimental results, but the Freundlich model represents better the results than others. The pseudo-second-order kinetics coincided quite with the kinetic results. Based on the obtained thermodynamic values such as standard Gibbs free energy change (ΔGad° < 0), standard enthalpy change (ΔHad° < 0) and standard entropy change (ΔSad° < 0), the nature of the adsorption process was spontaneous, exothermic and mainly physisorption.
Anahtar Kelimeler
adsorption | adsorption kinetics | adsorption thermodynamics | isotherm model | removal percentage
BM Sürdürülebilir Kalkınma Amaçları
Atıf Sayıları
Web of Science 10
Scopus 11
Removal of Methylene Blue Dye from Aqueous Solutions Using Carboxymethyl-β-Cyclodextrin-Fe3O4 Nanocomposite: Thermodynamics and Kinetics of Adsorption Process

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İletişim
  • Kastamonu Üniversitesi Rektörlüğü, Kuzeykent Kampüsü, Merkez/Kastamonu
  • unis@kastamonu.edu.tr 03662801000
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