Heterogeneous Catalytic Ozonation of Aniline-Contaminated Waters: A Three-Phase Modelling Approach Using TiO<sub>2</sub>/GAC
This work aims to study the sustainable catalytic ozonation of aniline promoted by granular active carbon (GAC) doped with TiO<sub>2</sub>. Aniline was selected as a model compound for the accelerator manufacturing industries used in the manufacture of rubber due to its environmental imp...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-12-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/12/12/3448 |
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| author | Cristian Ferreiro Natalia Villota José Ignacio Lombraña María J. Rivero |
| author_facet | Cristian Ferreiro Natalia Villota José Ignacio Lombraña María J. Rivero |
| author_sort | Cristian Ferreiro |
| collection | DOAJ |
| description | This work aims to study the sustainable catalytic ozonation of aniline promoted by granular active carbon (GAC) doped with TiO<sub>2</sub>. Aniline was selected as a model compound for the accelerator manufacturing industries used in the manufacture of rubber due to its environmental impact, low biodegradability, and harmful genotoxic effects on human health. Based on the evolution of total organic carbon (TOC), aniline concentration measured using high performance liquid chromatography (HPLC), pH and ozone concentration in liquid and gas phase, and catalyst loading, a three-phase reaction system has been modelled. The proposed three-phase model related the ozone transfer parameters and the pseudo-first order kinetic constants through three coefficients that involve the adsorption process, oxidation in the liquid, and the solid catalyst. The interpretation of the kinetic constants of the process allowed the predominance of the mechanism of Langmuir–Hinshelwood or modified Eley–Rideal to be elucidated. Seven intermediate aromatic reaction products, representative of the direct action of ozone and the radical pathway, were identified and quantified, as well as precursors of the appearance of turbidity, with which two possible routes of degradation of aniline being proposed. |
| first_indexed | 2024-03-10T14:13:37Z |
| format | Article |
| id | doaj.art-5944311b16e445ae9abb150dbdb8e614 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-10T14:13:37Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-5944311b16e445ae9abb150dbdb8e6142023-11-20T23:56:46ZengMDPI AGWater2073-44412020-12-011212344810.3390/w12123448Heterogeneous Catalytic Ozonation of Aniline-Contaminated Waters: A Three-Phase Modelling Approach Using TiO<sub>2</sub>/GACCristian Ferreiro0Natalia Villota1José Ignacio Lombraña2María J. Rivero3Department of Chemical Engineering, Faculty of Science and Technology, University of the Basque Country UPV/EHU, Barrio Sarriena s/n, 48940 Leioa, SpainDepartment of Chemical and Environmental Engineering, Faculty of Engineering Vitoria-Gasteiz, University of the Basque Country UPV/EHU, Nieves Cano 12, 01006 Vitoria-Gasteiz, SpainDepartment of Chemical Engineering, Faculty of Science and Technology, University of the Basque Country UPV/EHU, Barrio Sarriena s/n, 48940 Leioa, SpainDepartment of Chemical and Biomolecular Engineering, University of Cantabria, 39005 Santander, SpainThis work aims to study the sustainable catalytic ozonation of aniline promoted by granular active carbon (GAC) doped with TiO<sub>2</sub>. Aniline was selected as a model compound for the accelerator manufacturing industries used in the manufacture of rubber due to its environmental impact, low biodegradability, and harmful genotoxic effects on human health. Based on the evolution of total organic carbon (TOC), aniline concentration measured using high performance liquid chromatography (HPLC), pH and ozone concentration in liquid and gas phase, and catalyst loading, a three-phase reaction system has been modelled. The proposed three-phase model related the ozone transfer parameters and the pseudo-first order kinetic constants through three coefficients that involve the adsorption process, oxidation in the liquid, and the solid catalyst. The interpretation of the kinetic constants of the process allowed the predominance of the mechanism of Langmuir–Hinshelwood or modified Eley–Rideal to be elucidated. Seven intermediate aromatic reaction products, representative of the direct action of ozone and the radical pathway, were identified and quantified, as well as precursors of the appearance of turbidity, with which two possible routes of degradation of aniline being proposed.https://www.mdpi.com/2073-4441/12/12/3448anilinecatalytic ozonationdegradation routesindustrial wastewaterthree-phase systemTiO<sub>2</sub>/GAC |
| spellingShingle | Cristian Ferreiro Natalia Villota José Ignacio Lombraña María J. Rivero Heterogeneous Catalytic Ozonation of Aniline-Contaminated Waters: A Three-Phase Modelling Approach Using TiO<sub>2</sub>/GAC Water aniline catalytic ozonation degradation routes industrial wastewater three-phase system TiO<sub>2</sub>/GAC |
| title | Heterogeneous Catalytic Ozonation of Aniline-Contaminated Waters: A Three-Phase Modelling Approach Using TiO<sub>2</sub>/GAC |
| title_full | Heterogeneous Catalytic Ozonation of Aniline-Contaminated Waters: A Three-Phase Modelling Approach Using TiO<sub>2</sub>/GAC |
| title_fullStr | Heterogeneous Catalytic Ozonation of Aniline-Contaminated Waters: A Three-Phase Modelling Approach Using TiO<sub>2</sub>/GAC |
| title_full_unstemmed | Heterogeneous Catalytic Ozonation of Aniline-Contaminated Waters: A Three-Phase Modelling Approach Using TiO<sub>2</sub>/GAC |
| title_short | Heterogeneous Catalytic Ozonation of Aniline-Contaminated Waters: A Three-Phase Modelling Approach Using TiO<sub>2</sub>/GAC |
| title_sort | heterogeneous catalytic ozonation of aniline contaminated waters a three phase modelling approach using tio sub 2 sub gac |
| topic | aniline catalytic ozonation degradation routes industrial wastewater three-phase system TiO<sub>2</sub>/GAC |
| url | https://www.mdpi.com/2073-4441/12/12/3448 |
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