Optimization of the synthesis process of an iron oxide nanocatalyst supported on activated carbon for the inactivation of Ascaris eggs in water using the heterogeneous Fenton-like reaction

An experimental design methodology was used to optimize the synthesis of an iron-supported nanocatalyst as well as the inactivation process of Ascaris eggs (Ae) using this material. A factor screening design was used for identifying the significant experimental factors for nanocatalyst support (supp...

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Bibliographic Details
Published in:Water science and technology 2016-03, Vol.73 (5), p.1000-1009
Main Authors: Morales-Pérez, Ariadna A, Maravilla, Pablo, Solís-López, Myriam, Schouwenaars, Rafael, Durán-Moreno, Alfonso, Ramírez-Zamora, Rosa-María
Format: Article
Language:English
Subjects:
Activated carbon
Alcohol
Animals
Ascaris
Ascaris - drug effects
Carbon - chemistry
Chemical synthesis
Damage
Deactivation
Design
Design factors
Design optimization
Eggs
Environmental science
Experimental design
Ferric Compounds - chemistry
Hydrogen
Hydrogen Peroxide
Inactivation
Iron
Iron oxides
Irrigation
Mathematical models
Nanostructure
Nanostructures - chemistry
Nitrates
Ova
Ovum - chemistry
Oxidation
Oxidation process
Oxidation-Reduction
Pathogens
Photocatalysis
Reaction time
Water - parasitology
Water Pollutants, Chemical - analysis
Water Purification - methods
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Summary:An experimental design methodology was used to optimize the synthesis of an iron-supported nanocatalyst as well as the inactivation process of Ascaris eggs (Ae) using this material. A factor screening design was used for identifying the significant experimental factors for nanocatalyst support (supported %Fe, (w/w), temperature and time of calcination) and for the inactivation process called the heterogeneous Fenton-like reaction (H2O2 dose, mass ratio Fe/H2O2, pH and reaction time). The optimization of the significant factors was carried out using a face-centered central composite design. The optimal operating conditions for both processes were estimated with a statistical model and implemented experimentally with five replicates. The predicted value of the Ae inactivation rate was close to the laboratory results. At the optimal operating conditions of the nanocatalyst production and Ae inactivation process, the Ascaris ova showed genomic damage to the point that no cell reparation was possible showing that this advanced oxidation process was highly efficient for inactivating this pathogen.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2015.576