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Appl. Sci. 2012, 2(2), 513-524; doi:10.3390/app2020513
Article

Magnetic Amphiphilic Composites Applied for the Treatment of Biodiesel Wastewaters

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Received: 20 April 2012 / Revised: 4 May 2012 / Accepted: 18 May 2012 / Published: 29 May 2012
(This article belongs to the Special Issue Magnetic Nanoparticles: Synthesis, Properties and Applications)
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Abstract

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.
Keywords: magnetic amphiphilic systems; chrysotile; biodiesel wastewater; breaking emulsions process magnetic amphiphilic systems; chrysotile; biodiesel wastewater; breaking emulsions process
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Lemos, B.R.S.; Teixeira, A.P.C.; Ardisson, J.D.; Macedo, W.A.A.; Fernandez-Outon, L.E.; Amorim, C.C.; Moura, F.C.C.; Lago, R.M. Magnetic Amphiphilic Composites Applied for the Treatment of Biodiesel Wastewaters. Appl. Sci. 2012, 2, 513-524.

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