Research Article

Isotherm, kinetic and thermodynamic studies for the adsorption of methylene blue on almond leaf powder

Volume: 41 Number: 3 September 30, 2020
EN

Isotherm, kinetic and thermodynamic studies for the adsorption of methylene blue on almond leaf powder

Abstract

In this study almond leaf powder (ALP) was used as an adsorbent for the methylene blue (MB) removal. The initial MB concentration, interaction time and temperature effects were investigated in a batch experimental system. The equilibrium data was modelled using Langmuir, Freundlich and Temkin adsorption isotherms, while kinetic parameters were determined using the pseudo first order (PFO), pseudo second order (PSO) and intra-particle diffusion (IPD) models. It was noted that the Freundlich model was the most convenient option compared to the Langmuir and Temkin models. The Freundlich model coefficients increased as the temperature increased, proving that adsorption process is favorable at higher temperatures. The results also indicated that the experimental and calculated qe values were close to each other, which shows that this process fits the PSO kinetic model with higher R2 values than other two models. Kinetic constants became closer to both temperatures and the initial concentrations and qe values increased with the increase in the concentration of MB. The initial MB concentration increased from 10 to 60 mg/L, while the adsorption capacity on ALP increased from 1.46 to 9.24 mg/g, 1.61 to 9.71 mg/g and 1.89 to 10.71 mg/g for 298, 308 and 323 K, respectively. Gibbs free energy, enthalpy and entropy of this separation process were determined as -1737.1 J/mol, 14.776 kJ/mol and 55.413 J/mol, respectively. Results of this study showed that ALP can be an alternative material for dye removal.

Keywords

Supporting Institution

Van Yüzüncü Yıl Üniversitesi, Bilimsel Araştırma Projeleri Başkanlığı

Project Number

FAP-2019-8615

Thanks

Yazarlar, bu çalışmaya maddi olarak desteklerinden dolayı Van Yüzüncü Yıl Üniversitesi Bilimsel Araştırma Projeleri Başkanlığı'na (proje no: FAP-2019-8615) teşekkür eder.

References

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Details

Primary Language

English

Subjects

Engineering

Journal Section

Research Article

Publication Date

September 30, 2020

Submission Date

April 15, 2020

Acceptance Date

July 2, 2020

Published in Issue

Year 2020 Volume: 41 Number: 3

APA
Aldemir, A., & Kul, A. R. (2020). Isotherm, kinetic and thermodynamic studies for the adsorption of methylene blue on almond leaf powder. Cumhuriyet Science Journal, 41(3), 651-658. https://doi.org/10.17776/csj.720332
AMA
1.Aldemir A, Kul AR. Isotherm, kinetic and thermodynamic studies for the adsorption of methylene blue on almond leaf powder. CSJ. 2020;41(3):651-658. doi:10.17776/csj.720332
Chicago
Aldemir, Adnan, and Ali Rıza Kul. 2020. “Isotherm, Kinetic and Thermodynamic Studies for the Adsorption of Methylene Blue on Almond Leaf Powder”. Cumhuriyet Science Journal 41 (3): 651-58. https://doi.org/10.17776/csj.720332.
EndNote
Aldemir A, Kul AR (September 1, 2020) Isotherm, kinetic and thermodynamic studies for the adsorption of methylene blue on almond leaf powder. Cumhuriyet Science Journal 41 3 651–658.
IEEE
[1]A. Aldemir and A. R. Kul, “Isotherm, kinetic and thermodynamic studies for the adsorption of methylene blue on almond leaf powder”, CSJ, vol. 41, no. 3, pp. 651–658, Sept. 2020, doi: 10.17776/csj.720332.
ISNAD
Aldemir, Adnan - Kul, Ali Rıza. “Isotherm, Kinetic and Thermodynamic Studies for the Adsorption of Methylene Blue on Almond Leaf Powder”. Cumhuriyet Science Journal 41/3 (September 1, 2020): 651-658. https://doi.org/10.17776/csj.720332.
JAMA
1.Aldemir A, Kul AR. Isotherm, kinetic and thermodynamic studies for the adsorption of methylene blue on almond leaf powder. CSJ. 2020;41:651–658.
MLA
Aldemir, Adnan, and Ali Rıza Kul. “Isotherm, Kinetic and Thermodynamic Studies for the Adsorption of Methylene Blue on Almond Leaf Powder”. Cumhuriyet Science Journal, vol. 41, no. 3, Sept. 2020, pp. 651-8, doi:10.17776/csj.720332.
Vancouver
1.Adnan Aldemir, Ali Rıza Kul. Isotherm, kinetic and thermodynamic studies for the adsorption of methylene blue on almond leaf powder. CSJ. 2020 Sep. 1;41(3):651-8. doi:10.17776/csj.720332

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