Moraes José Ermírio F, Quina Frank H, Nascimento Cláudio Augusto O, Silva Douglas N, Chiavone-Filho Osvaldo
Departamento de Engenharia Química-Escola Politécnica, Universidade de São Paulo, Cidade Universitária, São Paulo, 05508-900, SP, Brazil.
Environ Sci Technol. 2004 Feb 15;38(4):1183-7. doi: 10.1021/es034217f.
The application of the photo-Fenton process to the treatment of saline wastewater contaminated with hydrocarbons is investigated. Aqueous saline solutions containing raw gasoline were used as a model oil-field-produced water. The dependence on concentrations of the following reagents has been appropriately evaluated: hydrogen peroxide (100-200 mM), iron ions (0.5-1 mM), and sodium chloride (200-2000 ppm). The reactions were monitored by measurement of the absorption spectra and total organic carbon (TOC). Experimental results demonstrate that the photo-Fenton process is feasible for the treatment of wastewaters containing hydrocarbons, even in the presence of high concentrations of salt. The effect of the salt in this process is described through a series of reactions. A simple feedforward neural network model was found to correlate well the observed data for the degradation process.
