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Evaluation of Cr(VI) Removal from Tanning Effluents Using Magnetic Nanoparticles of Fe3O4 Synthesized with Olea europaea Bone Extract
Abstract
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.
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Bejarano-Meza et al. used magnetic iron-based nanoparticles synthesized with O. europea bone extract to remove nearly all detectable Cr(VI) from RSIP's tannery effluents.
“Finally, Bejarano-Meza et al. [45] used magnetic iron-based nanoparticles synthesized with O. europea bone extract to remove nearly all detectable Cr(VI) from RSIP's tannery effluents.”
From Chromium Remediation from Tannery Wastewater in Arequipa, Peru: Local Experiences and Prospects for Sustainable Solutions (2025) · cites this paper as [45]
The Experimental Procedure (§3.1) says the effluent samples came from a tannery in Río Seco Industrial Park. The Introduction describes synthesis using Olea europaea bone extract, and Results (§2.4) reports Cr(VI) removal of 85% from tanning effluent and 100% from retanning effluent. Thus, “nearly all” overstates the result for the tanning sample. (LLM, conf=0.84)
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Cited by
Sorted by citations
Morales-Paredes, L. F., Garcia-Chevesich, P. A., Romero-Mariscal, G., Arenazas-Rodriguez, A., Ticona-Quea, J., Tejada-Purizaca, T. R., Vanzin, G., & Sharp, J. O. (2025) · Sustainability · doi:10.3390/su17031183 · Cited by 8
Metadata
- Authors
- Bejarano-Meza, M., Deza-Carrasco, F. E., Salinas-Herrera, S., Flores-Calla, S., & Jimenez-Pacheco, H. G.
- Venue
- Molecules
- Publisher
- MDPI AG
- Published
- 2024-01-22
- Volume
- 29
- Issue
- 2
- Pages
- 534
- ISSN
- 1420-3049
- PMC
- PMC10820370
- Cited by
- 9
- References
- 0
- Language
- en
- Funders
- Universidad Católica de Santa María (27574-R-2020)
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