Manganese ferrite graphene nanocomposite synthesis and the investigation of its antibacterial properties for water treatment purposes

  • Lara de Souza Soletti Centro de Ciências Exatas, Tecnológicas e Agrárias. Instituto Cesumar de Ciência, Tecnologia e Inovação. Universidade Cesumar (Unicesumar), Avenida Guedner, n° 1610, CEP: 87050-900, Maringá, PR, Brazil.
  • Maria Eliana Camargo Ferreira Departamento de Tecnologias Limpas. Instituto Cesumar de Ciência, Tecnologia e Inovação. Universidade Cesumar (Unicesumar), Avenida Guedner, n° 1610, CEP: 87050-900, Maringá, PR, Brazil.
  • Alex Toshio Kassada Departamento de Engenharia de Alimentos. Universidade Estadual de Maringá (UEM), Avenida Colombo, n° 5790, CEP: 87020-900, Maringá, PR, Brazil.
  • Benício Alves de Abreu Filho Departamento de Ciências Básicas da Saúde. Universidade Estadual de Maringá (UEM), Avenida Colombo, n° 5790, CEP: 87020-900, Maringá, PR, Brazil.
  • Rosangela Bergamasco Departamento de Engenharia Química. Universidade Estadual de Maringá (UEM), Avenida Colombo, n° 5790, CEP: 87020-900, Maringá, PR, Brazil.
  • Natália Ueda Yamaguchi Departamento de Tecnologias Limpas. Instituto Cesumar de Ciência, Tecnologia e Inovação. Universidade Cesumar (Unicesumar), Avenida Guedner, n° 1610, CEP: 87050-900, Maringá, PR, Brazil.
DOI: https://doi.org/10.4136/ambi-agua.2515
Keywords: antimicrobial, magnetic, nanoparticle.

Abstract

The main objective of this study was to synthesize a nanocomposite using graphene and manganese ferrite nanoparticles (MnFe2O4-G) and to evaluate its antibacterial activity for water treatment purposes. Its morphological characteristics were evaluated by instrumental techniques, such as scanning electron microscopy and transmission electron microscopy. The characterization results indicated that the nanocomposite presented nanoparticles of approximately 25 nm well dispersed in transparent and large (14 μm) graphene nanosheets. The antibacterial activity was evaluated in a batch experiment using a concentration of 40 μg mL-1 of nanocomposite (MnFe2O4-G, bare MnFe2O4 nanoparticles or graphene oxide), 1x105 CFU mL-1 of Escherichia coli, and 8 h of contact time at room temperature. The highest antibacterial capacity was observed for the hybrid nanocomposite (91.91%), due to the synergic effect of graphene and MnFe2O4 nanoparticles. Various mechanisms were proposed to explain the effective antibacterial activity of MnFe2O4-G, such as wrapping, oxidative stress, sharp-edge cutting effect, among others. The results showed that MnFe2O4-G is a potential alternative in water treatment processes as an antibacterial agent.


Published
06/07/2020
Issue
Vol. 15 No. 4 (2020)
Section
Papers

Authors maintain the copyrights for their work. However, they grant rights of first publication to Ambiente e Agua - An Interdisciplinary Journal of Applied Science. In compensation, the journal can transfer the copyrights, allowing non-commercial use of the article including the right of sending the article to other data bases or publication media. The journal uses the CC BY 4.0 license"