Oil removal from produced water by conjugation of flotation and photo-Fenton processes.

Autor: da Silva SS; Department of Chemical Engineering, Federal University of Rio Grande do Norte, Natal 59072-970, Brazil., Chiavone-Filho O; Department of Chemical Engineering, Federal University of Rio Grande do Norte, Natal 59072-970, Brazil., de Barros Neto EL; Department of Chemical Engineering, Federal University of Rio Grande do Norte, Natal 59072-970, Brazil., Foletto EL; Department of Chemical Engineering, Federal University of Santa Maria, Santa Maria 97105-900, Brazil. Electronic address: efoletto@gmail.com.
Jazyk: angličtina
Zdroj: Journal of environmental management [J Environ Manage] 2015 Jan 01; Vol. 147, pp. 257-63. Date of Electronic Publication: 2014 Sep 17.
DOI: 10.1016/j.jenvman.2014.08.021
Abstrakt: The present work investigates the conjugation of flotation and photo-Fenton techniques on oil removal performance from oilfield produced water. The experiments were conducted in a column flotation and annular lamp reactor for induced air flotation and photodegradation steps, respectively. A nonionic surfactant was used as a flotation agent. The flotation experimental data were analyzed in terms of a first-order kinetic rate model. Two experimental designs were employed to evaluate the oil removal efficiency: fractional experimental design and central composite rotational design (CCRD). Overall oil removal of 99% was reached in the optimum experimental condition after 10 min of flotation followed by 45 min of photo-Fenton. The results of the conjugation of induced air flotation and photo-Fenton processes allowed meeting the wastewater limits established by the legislations for disposal.
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Databáze: MEDLINE
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