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
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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.
Lemos BRS, Teixeira APC, Ardisson JD, Macedo WAA, Fernandez-Outon LE, Amorim CC, Moura FCC, Lago RM. Magnetic Amphiphilic Composites Applied for the Treatment of Biodiesel Wastewaters. Applied Sciences. 2012; 2(2):513-524.
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. 2012. "Magnetic Amphiphilic Composites Applied for the Treatment of Biodiesel Wastewaters." Appl. Sci. 2, no. 2: 513-524.