Article 2023 · 6 atıf

Isolation of Methylene Blue from Aqueous Solution Using a <i>Fraxinus Excelsior</i> L. (Oleaceae) Based Biosorbent: Isotherm, Kinetics, and Thermodynamics

Gulluce, Ekrem, Koc, Taha Yasin, Gulluce, Medine, Karadayi, Mehmet

Özet

Biosorption was carried out using Fraxinus excelsior L. (Oleaceae) (FEO) as a natural waste to remove methylene blue from aqueous solutions. Based on the results of the study carried out under optimum conditions (pH: 6, initial dye concentration: 5 mg/L, biosorbent dose: 1 g, contact time: 30 min, stirring speed: 150 rpm, and temperature: 298 K), the FEO biosorbent removed 89% of methylene blue from aqueous solutions. In addition, parameters affecting biosorption (pH, initial dye concentration, biosorbent dose, temperature, and stirring speed) were examined, and isotherm, kinetic, and thermodynamic studies were performed. Freundlich, Langmuir, Elovich, Temkin, and Dubinin-Radushkevich isotherms were calculated in the isotherm studies, and the Freundlich isotherm was higher than the others. The correlation coefficient of pseudo-second-order kinetic model was higher than for the pseudo-first-order kinetic model. The Delta G values from the thermodynamic studies showed that the process occurred spontaneously. Consequently, the FEO biosorbent is suitable in removing synthetic dyes from aqueous solutions due to its effectiveness, low cost, and eco-friendly characteristics.

Anahtar Kelimeler

Biosorption Fraxinus excelsior L Freundlich isotherm methylene blue spectrophotometry LOW-COST ADSORBENT ANIONIC DYES REMOVAL WASTE ADSORPTION EQUILIBRIUM BIOSORPTION CARBON COFFEE GREEN

WoS Kategorileri

Chemistry, Analytical

Sürdürülebilir Kalkınma Amaçları

Temiz Su ve Sıhhi Koşullar

Künye

Dergi: ANALYTICAL LETTERS
Yıl: 2023
Cilt: 56
Sayı: 3
Sayfa: 422-432
ISSN: 0003-2719
eISSN: 1532-236X
DOI: 10.1080/00032719.2022.2073365
WoS UID: WOS:000795578400001

Yayını aç (DOI)