Research Article

Effective Biosorption of Auramin O Dye with Sustainable Chickpea Pods Waste; Isotherms, Kinetics and Thermodynamic Analysis

Volume: 45 Number: 2 June 30, 2024
EN

Effective Biosorption of Auramin O Dye with Sustainable Chickpea Pods Waste; Isotherms, Kinetics and Thermodynamic Analysis

Abstract

This study investigated biosorbent properties in removing Auramin O (AO) dye from the aqueous solution of agricultural wastes released from chickpea (Cicer arietinum L.), which is widely produced in Turkey and the world. Biosorption studies were carried out using different values of parameters such as initial AO concentration, dye pH, contact time, temperature, and biosorbent amount. Characterization analyses of the biosorbent used before and after biosorption were carried out by scanning electron microscopy (SEM), energy dispersive X-ray (EDX), Brunauer–Emmett–Teller (BET), Fourier transform infrared spectroscopy (FTIR), and point of zero charge (PZC). Biosorption isotherms were evaluated using Langmuir, Freundlich, and Dubinin-Radushkevich (D-R) isotherm models. As a result of experimental data, it has been shown that the Langmuir isotherm model (R2 = 0.930) is the most compatible model for biosorption, while the biosorption kinetic mechanism proceeds through the pseudo-second-order (PSO) kinetic model (R2 = 0.965) and the intra-particle diffusion model. As a result of thermodynamic studies, it has been reported that biosorption is endothermic (ΔH0>0), spontaneous (ΔS0>0), and entropy-increasing (ΔG0 <0).

Keywords

References

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Details

Primary Language

English

Subjects

Solution Chemistry

Journal Section

Research Article

Publication Date

June 30, 2024

Submission Date

March 22, 2024

Acceptance Date

June 14, 2024

Published in Issue

Year 1970 Volume: 45 Number: 2

APA
Keskin, Z. S. (2024). Effective Biosorption of Auramin O Dye with Sustainable Chickpea Pods Waste; Isotherms, Kinetics and Thermodynamic Analysis. Cumhuriyet Science Journal, 45(2), 240-248. https://doi.org/10.17776/csj.1457268

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