Formation of Biochar Nanocomposite Materials Based on CoFe2O4 for Purification of Aqueous Solutions from Chromium Compounds (VI)

The paper proposes a simple one-stage synthesis of organic-inorganic composite materials based on oxide compounds of iron (III) and cobalt (II) with a developed surface. The process of cobalt(II) ferrite (CoFe2O4) structure formation on the biochar surface was studied. As an organic component, bioch...

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Bibliographic Details
Published in:Water (Basel) 2023-01, Vol.15 (1), p.93
Main Authors: Shabelskaya, Nina, Egorova, Marina, Radjabov, Asatullo, Burachevskaya, Marina, Lobzenko, Ilya, Minkina, Tatiana, Sushkova, Svetlana
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Agricultural production
Agricultural wastes
Aqueous solutions
Biomass
Cations
Charcoal
Chromium
Chromium compounds
Citric acid
Cobalt
Cobalt compounds
Cobalt ferrites
Composite materials
Fourier analysis
Fourier transforms
Helianthus
Industrial wastes
Industrial wastewater
Industrial wastewater treatment
Infrared analysis
Infrared spectroscopy
Methods
Nanocomposites
Potassium
Sunflowers
Surface chemistry
Thermal decomposition
Transmission electron microscopy
Wastewater treatment
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Summary:The paper proposes a simple one-stage synthesis of organic-inorganic composite materials based on oxide compounds of iron (III) and cobalt (II) with a developed surface. The process of cobalt(II) ferrite (CoFe2O4) structure formation on the biochar surface was studied. As an organic component, biochar was obtained from agricultural waste, including sunflower husks, rice husks, and pea kernels. Composite materials cobalt ferrite/biochar were obtained for the first time using these wastes. The obtained materials were characterized using X-ray phase analysis, fourier transform infrared spectroscopy (FTIR), transmission electron microscopy, and N2 adsorption-desorption. A mechanism for forming composite materials is proposed, including the stage of formation of chelate complexes of transition element cations with citric acid on the biochar surface and their subsequent thermal decomposition. High adsorption activity of the synthesized materials in the process of removing chromium (VI) ions from aqueous solutions was established. The sunflower husk biochar composite material based on CoFe2O4 has the highest adsorption capacity of 6.98 mg/g. The results suggest that biochar composites based on CoFe2O4 have great potential for the practical industrial wastewater treatment.
ISSN:2073-4441
2073-4441
DOI:10.3390/w15010093