Abstract
We present some preliminary results regarding possible reducing of environment phenol contamination with nanotechnology involving. Magnetic nanoparticles stabilized in water dispersion with oleate were prepared for experimental testing of their interaction with wastewater samples containing phenol residues from industrial and sanitation sources. Magnetite with moderate level of cobalt doping was synthesized by co-precipitation method in the form of nanoparticles; further their surface was modified by the reaction with sodium oleate solution. Quantum chemical simulation of oleate structure recommended it for the interaction with water dipolar molecules as well as with metal cations at the nanocores surface. Transmission Electron Microscopy confirmed fine granulation of the prepared sample meaning significant total surface of nanoparticle sample. Phenol loaded water model was let to interact with magnetic nanoparticles in various reaction conditions. Phenol absorbance in the main spectral band showed the concentration diminution following magnetic nanoparticle action in the presence of ultraviolet radiation and hydrogen peroxide supply. Further experiments are planned for the better optimization of the phenol concentration decreasing in the large volumes of wastewater with adequate nanostructures, able to develop efficient interaction mechanisms with pollutant molecules.
Highlights
Cobalt ferrite magnetic nanoparticles have been widely studied in recent decades, due to various technical and biomedical uses, based on the advantages of magnetic control and the large value of surface to volume ratio [1]
We performed some preliminary tests focused on the phenol interaction with magnetic nanoparticles stabilized with sodium oleate
Magnetite nanoparticles with medium cobalt doping level, stabilized with sodium oleate, were synthesized by chemical coprecipitation adapted method [11] and stabilized with sodium oleate [12], while phenolic water samples were adjusted with 1 mM concentration for the interaction with 1 g/l cobalt ferrite nanoparticles sample – as suggested by our previous tests
Summary
Cobalt ferrite magnetic nanoparticles have been widely studied in recent decades, due to various technical and biomedical uses, based on the advantages of magnetic control and the large value of surface to volume ratio [1]. The adjustment of the cobalt doping of iron oxide nanoparticles have increased the interest of researchers for the possibility to modulate various properties for possible applications in the life sciences [2, 3]. It has been shown that it is possible to use some magnetic nanoparticles to improve wastewater quality by removing chemical pollutants such as heavy metals, phenolic compounds [4, 5], drug residues or industrial dyes [6,7,8]. Some researchers [9] suggest the use of CoFe2O4 nanoparticles (maximum level of cobalt doping) for the successful treatment of metal-rich industrial effluents. Increasing emphasis is placed on the issue of widely used chemical reagents in many industrial processes most often represented - as a study model - phenol, which is widely used in industry, including in the synthesis of resins, dyes, pharmaceuticals. We performed some preliminary tests focused on the phenol interaction with magnetic nanoparticles stabilized with sodium oleate
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