Comparative Efficiencies for Phenol Degradation on Solar Heterogeneous Photocatalytic Reactors: Flat Plate and Compound Parabolic Collector
Phenol is a recalcitrant anthropogenic compound whose presence has been reported in both wastewater and drinking water; human exposure to phenolic substances can lead to health problems. The degradation of phenol (measured as COD decrease) through solar heterogeneous photocatalysis with immobilized...
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MDPI AG
2022-05-01
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| author | Felipe de J. Silerio-Vázquez Cynthia M. Núñez-Núñez María T. Alarcón-Herrera José B. Proal-Nájera |
| author_facet | Felipe de J. Silerio-Vázquez Cynthia M. Núñez-Núñez María T. Alarcón-Herrera José B. Proal-Nájera |
| author_sort | Felipe de J. Silerio-Vázquez |
| collection | DOAJ |
| description | Phenol is a recalcitrant anthropogenic compound whose presence has been reported in both wastewater and drinking water; human exposure to phenolic substances can lead to health problems. The degradation of phenol (measured as COD decrease) through solar heterogeneous photocatalysis with immobilized TiO<sub>2</sub> was performed in two different reactors: a flat-plate reactor (FPR) and a compound parabolic collector (CPC). A 2<sup>3</sup> full factorial experimental design was followed. The variables were the presence of TiO<sub>2</sub>, H<sub>2</sub>O<sub>2</sub> addition, and the type of reactor. Data were fitted to the pseudo-first-order reaction-rate-kinetics model. The rate constant for photocatalytic phenol degradation with 1 mM of H<sub>2</sub>O<sub>2</sub> was 6.6 × 10<sup>−3</sup> min<sup>−1</sup> for the FPR and 5.9 × 10<sup>−3</sup> min<sup>−1</sup> in the CPC. The calculated figures of merit were analyzed with a MANCOVA, with UV fluence as a covariate. An ANCOVA showed that the type of reactor, H<sub>2</sub>O<sub>2</sub> addition, or fluence had no statistically significant effect on the results, but there was for the presence of TiO<sub>2</sub>. According to the MANCOVA, fluence and TiO<sub>2</sub> presence were significant (<i>p</i> < 0.05). The CPC was on average 17.4% more efficient than the FPR when it came to collector area per order (<i>A<sub>CO</sub></i>) by heterogeneous photocatalysis and 1 mM H<sub>2</sub>O<sub>2</sub> addition. |
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| spelling | doaj.art-ef15870cf4a04dd198724d10caf33ead2023-11-23T15:58:41ZengMDPI AGCatalysts2073-43442022-05-0112657510.3390/catal12060575Comparative Efficiencies for Phenol Degradation on Solar Heterogeneous Photocatalytic Reactors: Flat Plate and Compound Parabolic CollectorFelipe de J. Silerio-Vázquez0Cynthia M. Núñez-Núñez1María T. Alarcón-Herrera2José B. Proal-Nájera3Centro de Investigación en Materiales Avanzados, Departamento de Ingeniería Sustentable, S.C. Calle CIMAV 110, Colonia 15 de Mayo, Durango 34147, MexicoIngeniería en Tecnología Ambiental, Universidad Politécnica de Durango, Carretera Durango-México km 9.5, Durango 34300, MexicoCentro de Investigación en Materiales Avanzados, Departamento de Ingeniería Sustentable, S.C. Calle CIMAV 110, Colonia 15 de Mayo, Durango 34147, MexicoInstituto Politécnico Nacional, CIIDIR-Durango, Calle Sigma 119, Fraccionamiento 20 de Noviembre II, Durango 34220, MexicoPhenol is a recalcitrant anthropogenic compound whose presence has been reported in both wastewater and drinking water; human exposure to phenolic substances can lead to health problems. The degradation of phenol (measured as COD decrease) through solar heterogeneous photocatalysis with immobilized TiO<sub>2</sub> was performed in two different reactors: a flat-plate reactor (FPR) and a compound parabolic collector (CPC). A 2<sup>3</sup> full factorial experimental design was followed. The variables were the presence of TiO<sub>2</sub>, H<sub>2</sub>O<sub>2</sub> addition, and the type of reactor. Data were fitted to the pseudo-first-order reaction-rate-kinetics model. The rate constant for photocatalytic phenol degradation with 1 mM of H<sub>2</sub>O<sub>2</sub> was 6.6 × 10<sup>−3</sup> min<sup>−1</sup> for the FPR and 5.9 × 10<sup>−3</sup> min<sup>−1</sup> in the CPC. The calculated figures of merit were analyzed with a MANCOVA, with UV fluence as a covariate. An ANCOVA showed that the type of reactor, H<sub>2</sub>O<sub>2</sub> addition, or fluence had no statistically significant effect on the results, but there was for the presence of TiO<sub>2</sub>. According to the MANCOVA, fluence and TiO<sub>2</sub> presence were significant (<i>p</i> < 0.05). The CPC was on average 17.4% more efficient than the FPR when it came to collector area per order (<i>A<sub>CO</sub></i>) by heterogeneous photocatalysis and 1 mM H<sub>2</sub>O<sub>2</sub> addition.https://www.mdpi.com/2073-4344/12/6/575solar irradiancetitanium dioxidebatch modefigures of meritfluencecollector area per order |
| spellingShingle | Felipe de J. Silerio-Vázquez Cynthia M. Núñez-Núñez María T. Alarcón-Herrera José B. Proal-Nájera Comparative Efficiencies for Phenol Degradation on Solar Heterogeneous Photocatalytic Reactors: Flat Plate and Compound Parabolic Collector Catalysts solar irradiance titanium dioxide batch mode figures of merit fluence collector area per order |
| title | Comparative Efficiencies for Phenol Degradation on Solar Heterogeneous Photocatalytic Reactors: Flat Plate and Compound Parabolic Collector |
| title_full | Comparative Efficiencies for Phenol Degradation on Solar Heterogeneous Photocatalytic Reactors: Flat Plate and Compound Parabolic Collector |
| title_fullStr | Comparative Efficiencies for Phenol Degradation on Solar Heterogeneous Photocatalytic Reactors: Flat Plate and Compound Parabolic Collector |
| title_full_unstemmed | Comparative Efficiencies for Phenol Degradation on Solar Heterogeneous Photocatalytic Reactors: Flat Plate and Compound Parabolic Collector |
| title_short | Comparative Efficiencies for Phenol Degradation on Solar Heterogeneous Photocatalytic Reactors: Flat Plate and Compound Parabolic Collector |
| title_sort | comparative efficiencies for phenol degradation on solar heterogeneous photocatalytic reactors flat plate and compound parabolic collector |
| topic | solar irradiance titanium dioxide batch mode figures of merit fluence collector area per order |
| url | https://www.mdpi.com/2073-4344/12/6/575 |
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