Karina Debs
Universidade Federal de São Paulo, Brazil
Title: Hybrid material: Yeast biomass from alcohol industry impregnated with magnetite nanoparticles. The potential uses in oil spills
Biography
Biography: Karina Debs
Abstract
Oil spills are a relevant concern because they can potentially impact the whole ecosystem. Finding materials that are able to remove oil from aqueous solution and remediate oil spills is, therefore, a necessity. In this study, yeast biomass from alcohol industry and magnetite nanoparticles are combined to form a hybrid material, which has magnetic properties. The magnetite nanoparticles were synthesized by co-precipitation of FeCl2.4H2O and FeCl3.6H2O. The hybrid material and magnetite nanoparticles were characterized using XRD, FTIR, SEM and VSM; these techniques confirmed the formation of the hybrid material. The material was tested for two oil removals (motor used/new oil) at different temperatures (5°C, 25°C and 45°C). In the used oil study, the temperature did not contribute with the removal capacity. The experiments showed an excellent oil removal capacity and the results were also compared to magnetite nanoparticles itself. The removal capacity varied from 1338 to 3272 g/kg of material, being the best result obtained at 5°C by the magnetite nanoparticle. Possibly, it occurs because the nanoparticles have a higher magnetic constant than the hybrid material, getting more oil stucked by the magnetic field.