Repository of Research and Investigative Information

Repository of Research and Investigative Information

Larestan University of Medical Sciences

Photocatalytic efficiency of CuNiFe2O4 nanoparticles loaded on multi-walled carbon nanotubes as a novel photocatalyst for ampicillin degradation

(2021) Photocatalytic efficiency of CuNiFe2O4 nanoparticles loaded on multi-walled carbon nanotubes as a novel photocatalyst for ampicillin degradation. Journal of Molecular Liquids. p. 12. ISSN 0167-7322

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Abstract

Nickel-copper ferrite nanoparticles (CuNiFe2O4) were loaded onto multi-walled carbon nanotubes (MWCNTs) and used as a novel photocatalyst in the photodegradation of ampicillin (AMP) from aqueous solutions. Photocatalyst properties were characterized by scanning electron microscopy, transition electron microscopy, Fourier-transform infrared spectroscopy, Brunauer-Emmett-Teller analysis, and X-ray diffraction. The results showed that the MWCNTs-CuNiFe2O4 in the UV-photocatalytic process has high degradation efficiency for AMP molecules (100), compared to adsorption (59.68), and photolysis (38.41) processes. At conditions: pH = 5, MWCNTs-CuNiFe2O4 dose = 0.5 g/L, reaction time = 60 min, and UV light intensity = 36 W, the suggested treatment provided a complete degradation rate of AMP, as well as 92.42 TOC removal and 93.32 COD removal. Formation of byproducts including ammonia (NH3), nitrate (NO3-) and sulfate (SO42-) during AMP photocatalytic degradation confirmed mineralization of organic compounds including nitrogen and sulfur compounds, in addition to CO2 and H2O. Scavenging experiments showed that superoxide (center dot O-2(-)), hydroxyl radicals (center dot OH) and holes (h(+)) were produced in the photocatalysis process, however center dot OH and h(+) were the main reactive species. The stability test demonstrated that the photocatalyst could be recycled 8 times with minimal performance reduction for AMP degradation. The energy consumption of the present process for different AMP concentrations was in the range of 5-33.33 kWh/m(3), which indicates that the suggested treatment is energy-efficient. Toxicity assessment with E. coli and P. phosphoreum inhibition rates showed that MWCNts-CuNiFe2O4 under UV light has a significant effect on reducing the toxicity ratio of photolysis alone. According to the findings, the application of MWCNTs-CuNiFe2O4 in the UV-photocatalytic process of AMP degradation is an eco-friendly and has high application potential in AMP removal and mineralization. (C) 2021 Elsevier B.V. All rights reserved.

Item Type: Article
Keywords: MWCNTs-CuNiFe2O4 Photodegradation Ampicillin Mineralization Stability study Toxicity aqueous-solution nickel ferrite parameters nanohybrid mineralization nanocomposite amoxicillin mechanisms oxidation products Chemistry Physics
Divisions: Education Vice-Chancellor Department > Faculty of Health > Department of Environmental Health Engineering
Page Range: p. 12
Journal or Publication Title: Journal of Molecular Liquids
Journal Index: ISI
Volume: 337
Identification Number: https://doi.org/10.1016/j.molliq.2021.116470
ISSN: 0167-7322
Depositing User: مهندس مهدی شریفی
URI: http://eprints.larums.ac.ir/id/eprint/354

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