| Full text | |
| Author(s): |
Silva, Priscila Christopoulos
[1]
;
Ferraz, Nathalia Pereira
[1]
;
Perpetuo, Elen Aquino
[1]
;
Olortiga Asencios, Yvan Jesus
[1]
Total Authors: 4
|
| Affiliation: | [1] Univ Fed Sao Paulo, Inst Mar, Campus Baixada Santista, Sao Paulo - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | JOURNAL OF SEDIMENTARY ENVIRONMENTS; v. 4, n. 1, p. 99-107, JAN-MAR 2019. |
| Web of Science Citations: | 0 |
| Abstract | |
The Oil Produced Water (OPW) is an effluent produced during the oil extraction process. Owing to its complex composition and toxicity it must be treated by wastewater treatment technologies. However, traditional facilities may be unable to remove all the anthropogenic or naturally occurring compounds. This can result in their discharge to surface water and ultimately affecting the sedimentary environment. The present work shows the application of two Advanced Oxidative Processes (AOPs), Photocatalysis and Photo-Fenton to treat two kinds of effluents: phenolic solution made in seawater, and a real sample of OPW from Rio Grande do Norte, Brazil. Two commercial catalysts were used: TiO2 (for Heterogeneous-Photocatalysis process), and FeSO4 center dot 7H(2)O (for Photo-Fenton process). The catalysts were characterized by X-Ray Diffraction Analysis (XRD), and Diffusive Reflectance Spectroscopy (DRS). In the two AOPs the following parameters were evaluated: initial pH of effluent (acid, neutral and alkaline), presence of H2O2 (0.3%v/v) and time under ultra-violet (UV) irradiation (254nm); aiming to find the suitable conditions for OPW treatment. The results showed an efficiency of 99% for phenol removal, despite the high content of salts present in seawater. In the treatment of the two effluents by the AOPs, the reaction reached chemical equilibrium in 1 h under UV irradiation (254 nm); the best pH to treat the effluents was pH 7, in the presence of H2O2 (0.3%v/v) and by increasing temperature to 75 degrees C (in the case of the real sample of OPW). The results of this work show that the two studied AOPs can be used in the oil industry, for OPW treatment and to treat effluents (with high salinity) contaminated with phenol, to remove organic compounds in order to reduce their toxicity, and consequently assist towards a better quality of the sedimentary environment. The best results were obtained by the Photo-Fenton process. (AU) | |
| FAPESP's process: | 14/24940-5 - Development of solid-catalysts based on semiconductor oxides for the hydrogen production from water splitting |
| Grantee: | Yvan Jesus Olortiga Asencios |
| Support Opportunities: | Regular Research Grants |