Banca de DEFESA: Fernanda Gabriela Gomes Pereira
Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.DISCENTE : Fernanda Gabriela Gomes Pereira
DATA : 28/08/2019
HORA: 14:00
LOCAL: campus vi
TÍTULO:
DEVELOPMENT OF NEW MATERIALS BASED ON HYDROXYAPATITE AND STEEL POWDER FOR USE IN ENVIRONMENTAL DECONTAMINATION PROCESSES
PALAVRAS-CHAVES:
bone, steel, powder coating, activated carbon, catalyst
PÁGINAS: 86
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
SUBÁREA: Química Inorgânica
ESPECIALIDADE: Físico Química Inorgânica
RESUMO:
In this work were developed two series of materials, activated coals and catalysts. These materials were based on industrial waste: hydroxyapatite from bone and steelmaking dust from Foundry steel industry.
For the synthesis of activated coals, hydroxyapatite was subjected to physical activation the 600 ° C and 700 ° C using the agents ativantes carbon dioxide and ethanol, in order to increase your surface area to enhance your adsorbent effect. The activated coals were characterized by thermogravimetric analysis (TG), adsorption and desorption isotherms of N2, scanning electron microscopy (SEM), x-ray diffraction (XRD), and absorption spectroscopy in the infrared region (IV). The activated coals were applied on adsorption of contaminants.
The synthesis of hydroxyapatite catalysts were impregnated with steelmaking dust (PA), steel industry waste, in concentrations of 5 and 15% m/m and impregnated materials were submitted to chemical vapor deposition process (Chemical Vapor Deposition-CVD) to 700 º C using ethanol as carbon source. The CVD process aims at the reduction of iron and training phases of carbonáceas structures on the inert martiz hydroxyapatite. As the materials feature nonpolar hydrophobic properties (carbon) and polar hydrophilic properties (hydroxyapatite and PA), they are referred to as hybrids. The materials were characterized by thermogravimetric analysis (TG), x-ray diffraction (XRD), adsorption and desorption isotherms of N2, scanning electron microscopy (SEM), energy dispersive x-ray spectroscopy (EDS) and X of spectroscopy absorption in the infrared (IR). For the application of the synthesized catalyst, oxidation tests were performed on contaminants in wastewater from oil and textiles.
There's a great relevance in the transformation of waste used in this work, such as bone and steelmaking dust, technological materials as catalysts for the removal of environmental contaminants because currently there are a few articles in the literature that use steel powder for this purpose, since it is generated on a large scale and has high content of metal oxides.
MEMBROS DA BANCA:
Externa ao Programa - DIANA QUINTAO LIMA
Interno - EUDES LORENCON
Presidente - RAQUEL VIEIRA MAMBRINI