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Volume 3, Issue 1 (2024)
GMJM 2024, 3(1): 19-29 |
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Received: 2023/07/10 | Accepted: 2024/01/25 | Published: 2024/03/5
Received: 2023/07/10 | Accepted: 2024/01/25 | Published: 2024/03/5
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Abbasinohoji F, Fazli M, Salehian F, Arabi A. Removal of Malachite Green from Aqueous Solution by LaMnO3 Nanorods as a High-Performance Adsorbent. GMJM 2024; 3 (1) :19-29
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1- Department of Chemistry, Semnan University, Semnan, Iran
Abstract (529 Views)
Aims: Utilizing inexpensive, non-toxic, wide outside face area as eco-friendly sorbent has been studied as a great replacement compound instead of high-priced toxic adsorbent stuff such as malachite green remover from wastewater.
Materials & Methods: LaMnO3 nanoparticles were used as a suitable adsorbent for malachite green removal from aqueous solutions. Adsorption values were investigated by changing contact time parameters, pH, temperature, adsorbent dosage, and initial dye concentration. Maximum adsorption capacity was 27.027mg.g-1 for 0.007g of LaMnO3. Various kinetic models were used to describe the kinetic data, and the first kinetic model was consistent with the results. The thermodynamic parameters of the LaMnO3 adsorption process, such as Gibbs free energy (ΔG0), standard enthalpy change (ΔH0), and standard entropy change (ΔS0), were calculated. All the chemicals were analytical grade and used without further purification. For LaMnO3, the following materials were used: H2O, La(NO3)3, MnCl2, and KMnO4, prepared via the hydrothermal method. The synthesized adsorbent was detected by FTIR, XRD, FESEM, and TEM analysis.
Findings: The process was spontaneous and endothermic due to the negative Gibbs free energy and the positive integrity of the enthalpy.
Conclusion: The adsorbent's performance in removing dyes from the aqueous medium has shown that it can be used as an effective and inexpensive adsorbent in treating a variety of colored sewage.
Materials & Methods: LaMnO3 nanoparticles were used as a suitable adsorbent for malachite green removal from aqueous solutions. Adsorption values were investigated by changing contact time parameters, pH, temperature, adsorbent dosage, and initial dye concentration. Maximum adsorption capacity was 27.027mg.g-1 for 0.007g of LaMnO3. Various kinetic models were used to describe the kinetic data, and the first kinetic model was consistent with the results. The thermodynamic parameters of the LaMnO3 adsorption process, such as Gibbs free energy (ΔG0), standard enthalpy change (ΔH0), and standard entropy change (ΔS0), were calculated. All the chemicals were analytical grade and used without further purification. For LaMnO3, the following materials were used: H2O, La(NO3)3, MnCl2, and KMnO4, prepared via the hydrothermal method. The synthesized adsorbent was detected by FTIR, XRD, FESEM, and TEM analysis.
Findings: The process was spontaneous and endothermic due to the negative Gibbs free energy and the positive integrity of the enthalpy.
Conclusion: The adsorbent's performance in removing dyes from the aqueous medium has shown that it can be used as an effective and inexpensive adsorbent in treating a variety of colored sewage.
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