Magnetic Amphiphilic Composites Applied for the Treatment of Biodiesel Wastewaters

In this work, new magnetic amphiphilic composites were prepared by chemical vapor deposition with ethanol on the surface of hydrophilic natural chrysotile matrix containing Fe catalyst. XRD, Raman, Mössbauer and SEM analyses suggest the formation of a complex nanostructured material composed of hydr...

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Bibliographic Details
Published in:Applied sciences 2012-06, Vol.2 (2), p.513-524
Main Authors: Lemos, Bruno R. S., Teixeira, Ana Paula C., Ardisson, José D., Macedo, Waldemar A. A., Fernandez-Outon, Luis E., Amorim, Camila C., Moura, Flávia C. C., Lago, Rochel M.
Format: Article
Language:English
Subjects:
Biodiesel fuels
biodiesel wastewater
breaking emulsions process
Carbon
Chemical oxygen demand
Chemical vapor deposition
chrysotile
Electronic mail systems
Ethanol
Hydrophilic surfaces
magnetic amphiphilic systems
Magnetic fields
Nanostructured materials
Spectrum analysis
Temperature
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Summary:In this work, new magnetic amphiphilic composites were prepared by chemical vapor deposition with ethanol on the surface of hydrophilic natural chrysotile matrix containing Fe catalyst. XRD, Raman, Mössbauer and SEM analyses suggest the formation of a complex nanostructured material composed of hydrophobic carbon nanotubes/nanofibers grown on the hydrophilic surface of the MgSi fiber mineral and the presence of Fe metallic nanoparticles coated by carbon. These nanostructured particles show amphiphilic properties and interact very well with both oil and aqueous phases. When added to emulsions the amphiphilic particles locate on the oil/water interface and, under a magnetic field, the oil droplets collapsed leading to the separation of the aqueous and oil phases. Preliminary work showed excellent results on the use of these particles to break wastewater emulsions in the biodiesel process.
ISSN:2076-3417
2076-3417
DOI:10.3390/app2020513