Evaluation of Cr(VI) Removal from Tanning Effluents Using Magnetic Nanoparticles of Fe3O4 Synthesized with Olea europaea Bone Extract

The tanning industry generates effluents with high chromium content, which require treatment prior to discharge into the sewage system. This article explores the use of magnetic magnetite nanoparticles (MNPs) to remove Cr(VI) from aqueous solutions, such as tanning effluents. The MNPs were synthesiz...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2024-01, Vol.29 (2), p.534
Main Authors: Bejarano-Meza, Maria, Deza-Carrasco, Fabricio Eduardo, Salinas-Herrera, Sofia, Flores-Calla, Susan, Jimenez-Pacheco, Hugo Guillermo
Format: Article
Language:English
Subjects:
Accuracy
Adsorption
Aqueous solutions
Bioaccumulation
Carcinogens
Chemical oxygen demand
chromium removal
Efficiency
Effluents
Energy consumption
Environmental impact
Heavy metals
magnetic nanoparticles
magnetite
Metal oxides
Methods
Nanoparticles
olive extract
Pollutants
R&D
Research & development
tanning effluent
Toxicity
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Summary:The tanning industry generates effluents with high chromium content, which require treatment prior to discharge into the sewage system. This article explores the use of magnetic magnetite nanoparticles (MNPs) to remove Cr(VI) from aqueous solutions, such as tanning effluents. The MNPs were synthesized by coprecipitation reaction using the Olea europaea extract as a reducing agent. Subsequently, they were characterized by dynamic light scattering spectroscopy (DLS), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). MNPs with irregular morphology and diameters ranging from 73.28 to 162.90 nm were obtained. Cr(VI) removal was performed using jar test methodology, and its efficiency was evaluated in the laboratory for different initial Cr(VI) (mg/L) concentration and nanoparticle (g/L) concentration. A kinetic study was developed and indicated that the equilibrium adsorption mechanism corresponds to a pseudo-second-order model. Furthermore, the isotherm analysis revealed that chromium adsorption best fits the Langmuir isotherm. Finally, Cr(VI) removal rates from 85% to 100% were achieved in tanning and retanning effluents.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules29020534