Physicochemical modifications of radioactive oil sludge by ozone treatment
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2020
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Journal of Environmental Chemical Engineering
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An experimental study on the degradation of organic compounds from radioactive oil sludge by the ozonation
process is presented. The effects of different concentrations of ozone in the oil sludge degradation over time were
investigated. The experiments were performed in a 0.125 L glass reactor with magnetic stirring and a diffuser
plate at the bottom to feed the ozone. The ozone concentration varied from 13 to 53 mg L−1 and the total
interaction time was 1 h. To investigate the physicochemical properties of the oil sludge (solid and liquid
components) prior to and after the treatment, multiple analytical characterization methods were used: Thermal
Gravimetric Analysis, X-ray diffraction, Scanning Electron Microscopy coupled with Energy-Dispersive X-ray
Spectroscopy, Fourier Transform Infrared spectroscopy, Spectrophotometer, and Residual Gas Analyzer. The
most perceptive change is in the color of the liquid medium turned from dark brown to light yellow, especially
under ozone concentrations higher than 33 mg L−1. Absorbance values decreased about 3.5 times after 30 min of
treatment with [O3] =53 mg L−1. FTIR spectroscopy showed that the bands associated with the CH3 and CeH in
CH2 disappeared during treatment. On the other hand, a greater presence of C]C aromatics was observed. By
residual gas analysis, various organic and inorganic gases were identified during the treatment, such as CH4, H2,
CO2, and H2S. Finally, the ozonation of the oil sludge proved to be effective, due to its high reaction capacity.
Como referenciar
ARAUJO, LEANDRO G. de; PRADO, EDUARDO S.P.; MIRANDA, FELIPE de S.; VICENTE, ROBERTO; SILVA SOBRINHO, ARGEMIRO S. da; PETRACONI FILHO, GILBERTO; MARUMO, JULIO T. Physicochemical modifications of radioactive oil sludge by ozone treatment. Journal of Environmental Chemical Engineering, v. 8, n. 5, p. 1-8, 2020. DOI: 10.1016/j.jece.2020.104128. Disponível em: http://repositorio.ipen.br/handle/123456789/31367. Acesso em: 25 Apr 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.