Degradação de compostos aromáticos presentes em água produzida através de sistema Fenton heterogêneo utilizando óxidos de ferro natural e sintético
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2009-07-03
Autores
Pereira, Júlia Raquel Peterle
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Universidade Federal do Espírito Santo
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The water produced (AP) is the wastewater of the oil industry that stands out for being the by-product generated in greater quantity and for its high toxic potential. Environmental risks associated with the AP may vary depending on their composition, and before being discarded or reused it must receive effective treatments to fit in the existing legislation, according to the destination that it will be given. This work aimed to propose a treatment in the Jubarte AP-ES field aiming the reduction of aromatic compounds through photo-Fenton and Fenton heterogeneous using synthetic magnetite doped with titanium and a clay soil rich in iron, collected in the Greater Vitória-ES Region, to replace the soluble iron, with the main objective of minimizing the generation of sludge. The magnetite with different degrees of substitution by isomorphic titanium were characterized by chemical analyses (Fe 2+, Fe3+, Ti 4+), X-ray diffraction and Mössbauer spectroscopy, while the soil was characterized by chemical analysis, size, X-ray diffraction and Mössbauer spectroscopy. The AP was characterized by: pH, conductivity, salinity, turbidity, total phenols and aromatic compounds by scanning spectrophotometry in ultraviolet (UV). The results showed that the increase of Ti4 + in the structure of magnetite increases the catalytic activity of the material. Preliminary tests showed that the presence of salt inhibits the reaction of Fenton and photo-Fenton. The process proved to be quite effective, resulting in significant removals of 92.5% for phenolic compounds using photo-Fenton reaction with titanomagnetita the degree of doping with titanium and 78% using photo-Fenton reaction with the clay soil after 60 minutes of reaction. The intensity of UV spectra of AP decreased significantly, indicating qualitatively the reduction of aromatic compounds by heterogeneous Fenton reaction.
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PEREIRA, Júlia Raquel Peterle. Degradação de compostos aromáticos presentes em água produzida através de sistema Fenton heterogêneo utilizando óxidos de ferro natural e sintético. 2009. Dissertação (Mestrado em Química) – Universidade Federal do Espírito Santo, Vitória, 2009.