Banca de DEFESA: FRANCISCO HIGOR VIEIRA DE ANDRADE SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : FRANCISCO HIGOR VIEIRA DE ANDRADE SILVA
DATE: 22/09/2023
TIME: 14:00
LOCAL: AUDITÓRIO DO PPGEQ
TITLE:

Reduced graphene oxide/polyamide Nanocomposite: An efficient nanomaterial applied in produced water (PA) treatment and oil/seawater separation

KEY WORDS:

Reduced graphene oxide; Nanocomposite; Oil/water separation; Produced water; Removal

PAGES: 105
BIG AREA: Engenharias
AREA: Engenharia Química
SUBÁREA: Tecnologia Química
SPECIALTY: Petróleo e Petroquímica
SUMMARY:

Contamination derived from offshore oil production and oil spillage at sea has been a major environmental problem. Therefore, the search for effective, sustainable, easy-to-apply and low-cost methods to solve this problem has been the subject of many studies in the last two decades. In addition, research and innovation as a goal in sustainable development, in protecting the environment and the climate and in guaranteeing life in water, are objectives defined by the United Nations so that the 2030 Agenda can be achieved in the world. Thus, synthesizing materials using nanotechnology tools has contributed to achieving these goals. One of the most promising 2D nanomaterials in studies involving environmental issues is reduced graphene oxide (RGO). Produced water (PA) as well as oil removal in seawater. This work was carried out in two stages and in the first, a fluoropolymer/RGO/PA nanocomposite was developed using an HP/HT process followed by spray coating applied in the removal of engine oil in seawater. In the second stage, a nanocomposite was developed in a semi-continuous HP/HT process with in situ reduction of graphene oxide, followed by infrared polymerization. In this step, a 2⁴ factorial design using Design Expert software was used evaluating the factors: temperature (ºC), RGO concentration (mg/L), reaction time (min) and pH were optimized. In both stages, the RGO and the nanocomposites were characterized using DRX, Raman Spectroscopy, SEM-FEG, HRTEM, FTIR and XPS. The results obtained in the first one demonstrated a significant efficiency in the separation of semi-synthetic motor oil in sea water, with an oil removal rate superior to 95%. In the second stage, the results demonstrated a significant efficiency in the contact angle greater than 120° being 55% higher compared to the uncoated polyamide fabric, with a water permeability between 10.1-16.9 mg/cm².h and an increase in the Oxygen content in the water of 81.8%. It is concluded that the developed nanocomposites present a significant advance in oil/water separation and also in the treatment of produced water from produced water, contributing to environmental preservation and sustainability at sea.

COMMITTEE MEMBERS:
Presidente - 2941160 - JOSE HERIBERTO OLIVEIRA DO NASCIMENTO
Interna - 2275848 - ELISAMA VIEIRA DOS SANTOS
Externo ao Programa - 1752014 - EDNEY RAFAEL VIANA PINHEIRO GALVAO - UFRNExterno ao Programa - 1754344 - MARCOS ALLYSON FELIPE RODRIGUES - UFRNExterno à Instituição - PEDRO TUPÃ PANDAVA AUM - UFPA