Banca de DEFESA: JOSE WAGNER ALVES GARRIDO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : JOSE WAGNER ALVES GARRIDO
DATE: 27/12/2019
TIME: 14:00
LOCAL: Miniauditório - Biblioteca Central Zila Mamede (BCZM)
TITLE:

Moringa oleifera: study of protein fraction in flocculation/flotation in the treatment of synthetic produced water and obtaining waste activated carbon for benzene removal.

KEY WORDS:

Effluent; Produced water; Moringa oleifera; Waste; Contaminants.

PAGES: 157
BIG AREA: Engenharias
AREA: Engenharia Química
SUMMARY:

In the petroleum industry, in the segment represented by petroleum extraction, the most relevant pollutant, is the water produced, due to their complex chemical composition of contaminants and quantity generated that can vary considerably. The inadequate discard of this wastewater implicate environmental damage, penalties and negative repercussion on producing companies, contrary to environmental legislation present. In this context, the flotation technique has been quite used in the treatment of this effluent, in order to reduce the

Content of oils and greases, associating the pretreatment stage operation of flocculation. In order to improve the final quality of this effluent, is it necessary to have another phase of post-treatment, which can be the use of activated carbon adsorption processes, that has been

widely studied, to remove dissolved part of oil which has in its composition monoaromatic hydrocarbons such as benzene, toluene, ethylbenzene and xylene. In this case, this research proposed to perform the treatment of synthetic wastewater with flocculation/flotation technique and adsorption by activated carbon, with the combined application of flocculation/ flotation dissolved air, using natural flocculants obtained from the seeds of the plant Moringa oleifera. Such flocculants were obtained by protein fractionation with ammonium sulfate extractant, that went called of crude extract, fraction 1, fraction 2 and fraction 3. And for the adsorption study were used three types of carbons by-products obtained from this plant, being coal in-natura, which was chemically activated in two ways, employing the phosphoric acid and ammonium hydroxide reagents. The main techniques and the parameters considered to characterize such coals were: hydrogen potential, point of zero charge, basic and acidic functional groups, thermogravimetric analysis, differential thermogravimetric, x-ray diffraction, x-ray fluorescence, scanning electron microscopy and infrared spectroscopy. The experiments of removal of oils and greases with combined technique flocculation/flotation were performed according to factorial and central planning, through which he statically verified the influence of process variables for the three flocculants: flocculant concentration and flotation time. From the adsorptive and equilibrium study, it was found that fresh coal

presented removal efficiency about 79.33% and the maximum benzene adsorption capacity was 65.07 mg.g^-1, values considered high when compared to other adsorbents. While, the chemically activated carbons presented removal efficiency of 51.56 and 84.61% and maximum adsorption capacities of 50.59 and 78.89 mg.g-1, respectively, with similar equilibrium time of 20 minutes. The natural flocculants produced presented potential for removal of oil and grease, to the point of reach the environmentals requirements for discard this effluent in natural bodies of water. The rapid removal of benzene and the range of the equilibrium in a short period of time, when compared to other precursors, these results may be indications that flocculants and adsorbents of Moringa oleifera are viable and efficient, and can constitute a promising alternative or the treatment of industrial effluents, making the process more economical.

BANKING MEMBERS:
Presidente - 1979301 - RENATA MARTINS BRAGA
Externa ao Programa - 3141362 - ANITA MARIA DE LIMA
Externa ao Programa - 2668814 - MAGNA ANGELICA DOS SANTOS BEZERRA SOUSA
Externo à Instituição - JANDUIR EGITO DA SILVA - IFAM
Externo à Instituição - MARCELO MENDES PEDROZA - IFTO