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Removal of methylene blue dye from aqueous solution using citric acid modified apricot stone       
Yazarlar
Doç. Dr. Erbil KAVCI Doç. Dr. Erbil KAVCI
Kafkas Üniversitesi, Türkiye
Prof. Dr. Jülide ERKMEN Prof. Dr. Jülide ERKMEN
Türkiye
Mehmet Semih Bingöl
Türkiye
Özet
In this study, apricot stones were modified with citric acid and used in the adsorption of methylene blue. Fourier transform infrared (FT-IR) Scanning electron microscopy (SEM), and X-Ray Diffraction (XRD) were used to characterize the adsorbent. The influence of the initial pH, temperature, contact time, and initial concentration on the adsorption process was investigated. The thermodynamic investigation showed that adsorption was spontaneous and the adsorption process was endothermic. In experimental studies, isotherm models by Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich (D-R) were analyzed and experimental data showed the best agreement with the Temkin isotherm model. We found that the maximum monolayer adsorption capacity for the Langmuir isotherm model was 19.01 mg/g. Pseudo-first and second-order models were examined and, according to the results of the kinetic model analysis, the highest correlation coefficient (R2> 0.99) belongs to the pseudo-second-order kinetic model. It was concluded that the adsorption mechanism was carried out in both the intra-particle diffusion and the liquid film diffusion model.
Anahtar Kelimeler
Adsorption | agricultural waste | apricot stone | citric acid | methylene blue | modification
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale
Dergi Adı CHEMICAL ENGINEERING COMMUNICATIONS
Dergi ISSN 0098-6445
Dergi Tarandığı Indeksler SCI-Expanded
Dergi Grubu Q3
Makale Dili İngilizce
Basım Tarihi 02-2023
Cilt No 210
Sayı 2
Sayfalar 165 / 180
Doi Numarası 10.1080/00986445.2021.2009812
Makale Linki http://dx.doi.org/10.1080/00986445.2021.2009812