TiO2 P25 and Kronos vlp 7000 materials activated by simulated solar light for atrazine degradation
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Murilo Tomazini Munhoz Moya
, Fernando Silva Lopes
Abstract
Photocatalysis-based technologies have been proposed for the treatment of wastewater containing atrazine (ATZ), a persistent and recalcitrant pollutant. This study aims to evaluate and compare the efficiency of TiO2 P25 and TiO2 modified with carbon (C–TiO2 Kronos vlp 7000) in the photocatalytic degradation of ATZ in aqueous systems. The experiments were performed in a tubular photochemical reactor equipped with a compound parabolic collector (CPC) irradiated by simulated solar light. The materials were characterized by X-ray diffraction, infrared spectroscopy, BET specific surface area, and diffuse reflectance spectroscopy. For TiO2 P25, ATZ removals varied in the range 86–100 % after 120 min of irradiation, although the total organic carbon (TOC) analyses indicated that no significant ATZ mineralization occurred (<20 %). C–TiO2 Kronos vlp 7000, on the other hand, was not able to completely remove ATZ after 120 min of irradiation. In this case, pesticide removals were 37–45 % over 120 min, while C–TiO2 performed better with regard to ATZ mineralization, with 38 % TOC removal. Given the low mineralization of atrazine, the intermediate compounds formed were identified for each photocatalytic material.
Funding source: Coordenação de Aperfeiçoamento de Pessoal de NÃ-vel Superior
Award Identifier / Grant number: Finance Code 001
Funding source: Conselho Nacional de Desenvolvimento CientÃ-fico e Tecnológico
Acknowledgments
The authors thank the Coordination for the Improvement of Higher Education Personnel (CAPES) - Brazil – Finance Code 001, and the National Council for Scientific and Technological Development (CNPq, Brazil, grant #311230/2020-2). We are also thankful to the Environmental Chemistry Research Group (GPQA/IQ-USP) and to Dr. Thiago Hewer for the support with the analysis of diffuse reflectance, and also to the Laboratory of Particulate Materials and Non-Metallic Solids (LMPSol/PMT-EPUSP) for the BET and X-ray diffraction analyses.
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: This work was funded by the Coordination for the Improvement of Higher Education Personnel (CAPES) – Brazil – Finance Code 001, and the National Council for Scientific and Technological Development (CNPq, Brazil).
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Conflict of interest statement: The authors report there are no competing interests to declare.
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Data availability statement: The data supporting the findings of this study are available within the article and its supplementary materials.
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Artikel in diesem Heft
- Frontmatter
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- Methylene blue removal from aqueous solution using modified Met-SWCNT-Ag nanoparticles: optimization using RSM-CCD
- Leaching behavior of germanium presented in different phases from zinc oxide dust under atmospheric acid leaching conditions
- TiO2 P25 and Kronos vlp 7000 materials activated by simulated solar light for atrazine degradation
- Numerical investigations on hydrothermal flame characteristics of water-cooled hydrothermal burner
- Moving bed biofilm reactor combined with an activated carbon filter for biological nitrate removal
- Preparation of bimodal mesoporous CoCe composite oxide for ethanol complete oxidation in air
- Hydrocracking of hydrotreated light cycle oil for optimizing BTEX production: a simple kinetic model
- Hydrodynamic comparison of different geometries of square cross-section airlift bioreactor using computational fluid dynamics
- Influence of different influence parameters on mixing characteristics of silicon particles in cassette
Artikel in diesem Heft
- Frontmatter
- Articles
- Methylene blue removal from aqueous solution using modified Met-SWCNT-Ag nanoparticles: optimization using RSM-CCD
- Leaching behavior of germanium presented in different phases from zinc oxide dust under atmospheric acid leaching conditions
- TiO2 P25 and Kronos vlp 7000 materials activated by simulated solar light for atrazine degradation
- Numerical investigations on hydrothermal flame characteristics of water-cooled hydrothermal burner
- Moving bed biofilm reactor combined with an activated carbon filter for biological nitrate removal
- Preparation of bimodal mesoporous CoCe composite oxide for ethanol complete oxidation in air
- Hydrocracking of hydrotreated light cycle oil for optimizing BTEX production: a simple kinetic model
- Hydrodynamic comparison of different geometries of square cross-section airlift bioreactor using computational fluid dynamics
- Influence of different influence parameters on mixing characteristics of silicon particles in cassette