Banca de QUALIFICAÇÃO: JOEMIL OLIVEIRA DE DEUS JUNIOR

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : JOEMIL OLIVEIRA DE DEUS JUNIOR
DATE: 13/02/2023
TIME: 10:00
LOCAL: MODO REMOTO
TITLE:

DEVELOPMENT OF BIOSORBENT PARTICLES FOR THE TREATMENT OF PRODUCED WATER IN A COMBINED ADSORPTION/FLOTATION SYSTEM

KEY WORDS:

Adsorption, flotation, biomass, effluent treatment, produced water.

PAGES: 90
BIG AREA: Engenharias
AREA: Engenharia Química
SUBÁREA: Tecnologia Química
SPECIALTY: Tratamentos e Aproveitamento de Rejeitos
SUMMARY:

Produced water management is a concern in the oil industry due to the toxicity of the effluent and its immense produced volume, so the optimization of contaminant removal techniques, such as adsorption and flotation, is necessary to keep the process sustainable and unexpensive. Therefore, the aim of this work was to develop eco-friendly and low-cost bioadsorbent composites to remove contaminants from produced water through the combination of adsorption and flotation techniques. The composite was produced from a mixture of chitosan, biochar and bentonite via wet-spinning and characterized by immediate analysis, Boehm titration, zeta potential, pH at zero charge point, infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). A mix design was carried out to optimize the composition of the bioadsorbent, evaluating its percentage of removal of Cu (II) ions. The adsorption tests were carried out in a finite bath using single and multielement solutions of copper, lead and cadmium. While the flotation tests were carried out through a system using dissolved air in a column (flotatest), with feeding of monoelementary copper solution in batches. The morphological and superficial characterization of the material evidenced the presence of organic functional groups and pores that can become adsorption sites for contaminants such as heavy metals. The adsorption tests in systems with only one metallic species obtained a removal percentage above 90% for cadmium, lead and copper. However, in multielementary system, Cu2+, Pb2+ and Cd2+ ions showed a reduction in the maximum removal percentages, with lead adsorbed more efficiently (above 80%), followed by copper (above 40%) and, finally, cadmium with less than 20% removal. Therefore, it can be stated that the composite developed has the potential to remove heavy metals, which are some of the highly toxic contaminants present in produced water.

COMMITTEE MEMBERS:
Externa à Instituição - KARINE FONSECA SOARES DE OLIVEIRA
Externa ao Programa - 2668814 - MAGNA ANGELICA DOS SANTOS BEZERRA SOUSA - nullInterno - 6347420 - MARCUS ANTONIO DE FREITAS MELO
Interna - 1979301 - RENATA MARTINS BRAGA