Banca de DEFESA: JESSYCA KAENNY DE ANDRADE BEZERRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : JESSYCA KAENNY DE ANDRADE BEZERRA
DATA : 14/02/2017
HORA: 14:00
LOCAL: AUDITÓRIO DO PPGEQ
TÍTULO:
PALAVRAS-CHAVES:

Adsorption; monoaromatic compounds; sludge; activated carbon;

PÁGINAS: 78
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Química
RESUMO:

Monoaromatic compounds (BTEX) are toxic and carcinogenic substances that even in small dimensions harm the environment and human health. These compounds are used as solvents and found in fuels such as petroleum and gasoline and it is continuously released into the environment. Therefore, the methods of removal of these contaminants are being studied a way to reduce high concentrations present on soils and groundwater. Thus, the adsorption process is based on a solid, denominated adsorbent, to adsorb on surface the contaminants present in the aqueous solutions analyzed. Sludge, a subproduct generated during the sewage treatment process, is a recent problem of worldwide concern. Activated carbon (AC) production for any adsorption process is relatively high, can be used as a potentially economic alternative, and feedstock value and residue reduction can be added. The aim of the present work is to prepare and characterize the activated carbon from the sewage sludge and to apply on monoaromatic compounds (benzene and toluene) in aqueous solutions. In the process of activated carbon synthesis, a chemical activation with potassium hydroxide (KOH) was studied, submitted to the thermal treatment of pyrolysis in a nitrogen flow at 100 mL.min-1, at a temperature of 550ºC. X-ray Diffraction (XRD), X-Ray Fluorescence (XRF), Scanning Electron Microscopy (SEM) and the study of the surface area using the BET method. The kinetic parameters using as pseudo first order, pseudo second order and intraparticle diffusion equations were shown to be consistent with the results obtained in the literature. In addition, it was possible to observe that both Langmuir and Freundlich model can predict the experimental data for a benzene and toluene adsorption. The results obtained in this study were presented as optimal study conditions in order to favor adaptation costs.

 

MEMBROS DA BANCA:
Presidente - 347567 - MARCIA MARIA LIMA DUARTE
Externo ao Programa - 2929066 - ANDRE LUIS LOPES MORIYAMA
Externo ao Programa - 2668814 - MAGNA ANGELICA DOS SANTOS BEZERRA SOUSA
Externo à Instituição - GERALDO MARTINS RODRIGUES FILHO - NENHUMA