Original scientific paper

https://doi.org/10.15255/KUI.2024.032

Synthesis and Characterisation of Nano Zero-Valent Iron for the Reduction and Immobilisation of Cr(VI) in Water Resources

Martin Stojchevski ; Ss. Cyril and Methodius University in Skopje, Faculty of Technology and Metallurgy, Ulica Rugjera Boskovica 16, 1000 Skopje, R. N. Macedonia *
Stefan Kuvendziev orcid.org/0000-0003-2347-2038 ; Ss. Cyril and Methodius University in Skopje, Faculty of Technology and Metallurgy, Ulica Rugjera Boskovica 16, 1000 Skopje, R. N. Macedonia
Zoran Bozinovski ; Eko Bio Link, Ulica Petra Deljana 3-1/4 , 1000 Skopje, R. N. Macedonia
Petre Makreski orcid.org/0000-0003-0662-5995 ; Ss. Cyril and Methodius University in Skopje, Faculty of Natural Sciences and Mathematics, Institute of Chemistry, Arhimedova ulica 5, 1000 Skopje, R. N. Macedonia
Perica Paunović orcid.org/0000-0001-5156-5907 ; Ss. Cyril and Methodius University in Skopje, Faculty of Technology and Metallurgy, Ulica Rugjera Boskovica 16, 1000 Skopje, R. N. Macedonia
Mirko Marinkovski ; Ss. Cyril and Methodius University in Skopje, Faculty of Technology and Metallurgy, Ulica Rugjera Boskovica 16, 1000 Skopje, R. N. Macedonia
Kiril Lisichkov orcid.org/0000-0002-9905-576X ; Ss. Cyril and Methodius University in Skopje, Faculty of Technology and Metallurgy, Ulica Rugjera Boskovica 16, 1000 Skopje, R. N. Macedonia

* Corresponding author.

Abstract

Nano zero-valent iron (nZVI) was synthesised through the chemical reduction of Fe(III) ions using iron(III) chloride and sodium borohydride solutions under atmospheric conditions. Structural and chemical characterisation of nZVI was performed using scanning electron microscopy (SEM), X-ray powder diffraction (XRPD), energy dispersive X-ray fluorescence spectrometry (EDXRF), thermogravimetric/differential thermal analysis (TGA/DTA), specific surface area analysis (SSA), and ultraviolet-visible spectroscopy (UV/Vis). The synthesised iron exhibited a zero oxidation state and a nearly one-dimensional morphology. The zero-valent iron nanoparticles with a body-centred cubic crystal structure remained chemically stable for several months. The mean diameter of individual nanoparticles was less than 60 nm, with an SSA of 23.79 m2 g–1. The synthesised nZVI was applied for the catalytic reduction of Cr(VI) in an aqueous solution. The effects of contact time and initial nZVI concentration on the efficiency of Cr(VI) removal from aqueous solution were investigated. The removal efficiency reached 44.2, 74.6, and 94.5 % after 300 min at initial nZVI concentrations of 20, 40, and 60 mg l–1, respectively. This study suggests that the obtained nZVI is an environmentally friendly and effective reducing agent for treating wastewater and groundwater contaminated with hexavalent chromium.

Keywords

nano zero-valent iron; synthesis; characterisation; Cr(VI) removal

Hrčak ID:

327847

URI

https://hrcak.srce.hr/327847

Publication date:

18.3.2025.

Article data in other languages: croatian

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