Effective removal of rhodamine B dyestuff using colemanite as an adsorbent: Isotherm, kinetic, thermodynamic analysis and mechanism
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Tarih
2025
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Ltd
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Removal of Rhodamine B (RhB) from aqueous solutions was performed by the batch adsorption process. Colemanite was characterized as an adsorbent by Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD) and X-Ray Fluorescence (XRF). The effects of contact time, the effect of the initial concentration of the dye, the amount of adsorbent and temperature parameters on the removal of RhB were investigated. Equilibrium adsorption data of RhB on colemanite were analyzed using the Langmuir, Freundlich and Dubinin-Radushkevich isotherm models. It was found that the isotherm that showed the highest correlation with experimental data was the Langmuir isotherm. Using the Langmuir isotherm, the theoretical adsorption capacity was calculated as 42.02 mg/g. Adsorption kinetics were analyzed with Pseudo-First-Order, Pseudo-Second-Order and Intraparticle diffusion models. As a result of the calculations, it was determined that the most appropriate kinetic model was the Pseudo-Second-Order kinetic model. Thermodynamic studies have shown that adsorption is a physical, non-spontaneous, exothermic process in which randomness at the solid-liquid interface decreases. According to the results obtained, it can be said that colemanite can be used as a suitable adsorbent in the removal of Rhodamine B dye from wastewater. © 2024 The Author
Açıklama
Anahtar Kelimeler
Adsorption, Colemanite, Isotherms, Kinetic models, Rhodamine B, Wastewater
Kaynak
Heliyon
WoS Q Değeri
Scopus Q Değeri
Q1
Cilt
11
Sayı
1
