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Enhanced Antibacterial Activity of CeO2 Nanoparticles by Surfactants

  • Rosalia Cuahtecontzi-Delint EMAIL logo , Miguel A Mendez-Rojas , Erick R Bandala , Marco A Quiroz , Sonia Recillas and Jose Luis Sanchez-Salas
Published/Copyright: June 20, 2013
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International Journal of Chemical Reactor Engineering
From the journal International Journal of Chemical Reactor Engineering Volume 11 Issue 2

Abstract

CeO2 nanoparticles (NPs) were tested to assess their toxicity on Escherichia coli strain in the presence of non-ionic surfactants. The NPs were dispersed in water by sonication at different pH values and times then mixed with three different surfactants (i.e., Triton X-100, Polyvinyl Pyrrolidone (PVP) and Tween 80) with a concentration of 0.001% v/v. It was found that sonication favored dispersion of the material and produced particles having 100 nm sizes in average. The material show toxicity to E. coli at pH 7 when growth using only minimal M9 media; no toxic response was observed for bacteria growth in rich media. The toxic effect in minimal media was enhanced by adding any of the non-ionic surfactants to the media. The use of CeO2 plus surfactant decreased the minimal inhibitory concentration (MIC) value of E. coli. The highest effect was observed for addition of Tween 80, in this case MIC value was 0.150 mg mL–1 compared to 3 mg mL–1 of CeO2 alone (almost 20 times improvement). These findings suggest the importance of different substances that can interact with NPs, like surfactants, usually present in wastewater systems that may lead to undesirable unexpected toxic characteristics in materials usually considered as innocuous.

Keywords: CeO2; antibacterial; surfactants; nanoparticles; nanotoxicology

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Published Online: 2013-06-20

©2013 by Walter de Gruyter Berlin / Boston

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  2. Masthead
  3. Editorial
  4. In Honor of Alberto E. Cassano: Researcher, Engineer, and Academic
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  7. Synthesis, Characterization, and Comparison of Sol–Gel TiO2 Immobilized Photocatalysts
  8. Determination of Kinetic Parameter in a Unified Kinetic Model for the Photodegradation of Phenol by Using Nonlinear Regression and the Genetic Algorithm
  9. Mass Transfer and Conservation from a Finite Source to an Infinite Media
  10. Modelling and Simulation of Gas–liquid Hydrodynamics in a Rectangular Air-lift Reactor
  11. Two-Dimensional Modeling of an Externally Irradiated Slurry Photoreactor
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  14. A Simple and Semi-Empirical Model to Predict THMs Generation in Water Facilities Including pH Effects
  15. On the Standardization of the Photocatalytic Gas/Solid Tests
  16. Microalgae Technology: A Patent Survey
  17. Influence of Physical and Optical Parameters on 2,4-Dichlorophenol Degradation
  18. Factors Capable of Modifying the Response of Pseudomonas aeruginosa to the Inactivation Induced by Heterogeneous Photocatalysis
  19. Enhanced Antibacterial Activity of CeO2 Nanoparticles by Surfactants
  20. Determination of Photochemical, Electrochemical and Photoelectrochemical Efficiencies in a Photoelectrocatalytic Reactor
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https://doi.org/10.1515/ijcre-2012-0055
Keywords for this article
CeO2; antibacterial; surfactants; nanoparticles; nanotoxicology

Articles in the same Issue

  1. Masthead
  2. Masthead
  3. Editorial
  4. In Honor of Alberto E. Cassano: Researcher, Engineer, and Academic
  5. Articles
  6. From Ideal Reactor Concepts to Reality: The Novel Drum Reactor for Photocatalytic Wastewater Treatment
  7. Synthesis, Characterization, and Comparison of Sol–Gel TiO2 Immobilized Photocatalysts
  8. Determination of Kinetic Parameter in a Unified Kinetic Model for the Photodegradation of Phenol by Using Nonlinear Regression and the Genetic Algorithm
  9. Mass Transfer and Conservation from a Finite Source to an Infinite Media
  10. Modelling and Simulation of Gas–liquid Hydrodynamics in a Rectangular Air-lift Reactor
  11. Two-Dimensional Modeling of an Externally Irradiated Slurry Photoreactor
  12. Role of Aspect Ratio and Joule Heating within the Fluid Region Near a Cylindrical Electrode in Electrokinetic Remediation: A Numerical Solution based on the Boundary Layer Model
  13. Solar Water Disinfection Using NF-codoped TiO2 Photocatalysis: Estimation of Scaling-up Parameters
  14. A Simple and Semi-Empirical Model to Predict THMs Generation in Water Facilities Including pH Effects
  15. On the Standardization of the Photocatalytic Gas/Solid Tests
  16. Microalgae Technology: A Patent Survey
  17. Influence of Physical and Optical Parameters on 2,4-Dichlorophenol Degradation
  18. Factors Capable of Modifying the Response of Pseudomonas aeruginosa to the Inactivation Induced by Heterogeneous Photocatalysis
  19. Enhanced Antibacterial Activity of CeO2 Nanoparticles by Surfactants
  20. Determination of Photochemical, Electrochemical and Photoelectrochemical Efficiencies in a Photoelectrocatalytic Reactor
  21. Correlations between Molecular Descriptors from Various Volatile Organic Compounds and Photocatalytic Oxidation Kinetic Constants
  22. Role of Joule Heating in Electro-Assisted Processes: A Boundary Layer Approach for Rectangular Electrodes
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