Degradation Efficiency and Kinetics Analysis of an Advanced Oxidation Process Utilizing Ozone, Hydrogen Peroxide and Persulfate to Degrade the Dye Rhodamine B
In this study, the effectiveness of a rhodamine B (RhB) dye degradation process at a concentration of 20 mg/L in different advanced oxidation processes—H<sub>2</sub>O<sub>2</sub>/UV, O<sub>3</sub>/UV and PDS/UV—has been studied. The use of UV in a photo-assisted o...
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MDPI AG
2021-08-01
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| author | Piotr Zawadzki Małgorzata Deska |
| author_facet | Piotr Zawadzki Małgorzata Deska |
| author_sort | Piotr Zawadzki |
| collection | DOAJ |
| description | In this study, the effectiveness of a rhodamine B (RhB) dye degradation process at a concentration of 20 mg/L in different advanced oxidation processes—H<sub>2</sub>O<sub>2</sub>/UV, O<sub>3</sub>/UV and PDS/UV—has been studied. The use of UV in a photo-assisted ozonation process (O<sub>3</sub>/UV) proved to be the most effective method of RhB decolorization (90% after 30 min at dye concentration of 100 mg/L). The addition of sulfate radical precursors (sodium persulfate, PDS) to the reaction environment did not give satisfactory effects (17% after 30 min), compared to the PDS/UV system (70% after 30 min). No rhodamine B decolorization was observed using hydrogen peroxide as a sole reagent, whereas an effect on the degree of RhB degradation was observed when UV rays strike the sample with H<sub>2</sub>O<sub>2</sub> (33% after 30 min). The rhodamine B degradation process followed the pseudo-first-order kinetics model. The combined PDS/O<sub>3</sub>/UV process has shown 60% color removal after 30 min of reaction time at an initial dye concentration of 100 mg/L. A similar effectiveness was obtained by only applying ozone or UV-activated persulfate, but at a concentration 2–5 times lower (20 mg/L). The results indicated that the combined PDS/O<sub>3</sub>/UV process is a promising method for high RhB concentrations (50–100 mg/L) comparing to other alternative advanced oxidation processes. |
| first_indexed | 2024-03-10T08:56:36Z |
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| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T08:56:36Z |
| publishDate | 2021-08-01 |
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| series | Catalysts |
| spelling | doaj.art-7ac144cdbb3841d6adb7870dc3350b922023-11-22T07:07:29ZengMDPI AGCatalysts2073-43442021-08-0111897410.3390/catal11080974Degradation Efficiency and Kinetics Analysis of an Advanced Oxidation Process Utilizing Ozone, Hydrogen Peroxide and Persulfate to Degrade the Dye Rhodamine BPiotr Zawadzki0Małgorzata Deska1Department of Water Protection, Central Mining Institute, Plac Gwarków 1, 40-166 Katowice, PolandDepartment of Water Protection, Central Mining Institute, Plac Gwarków 1, 40-166 Katowice, PolandIn this study, the effectiveness of a rhodamine B (RhB) dye degradation process at a concentration of 20 mg/L in different advanced oxidation processes—H<sub>2</sub>O<sub>2</sub>/UV, O<sub>3</sub>/UV and PDS/UV—has been studied. The use of UV in a photo-assisted ozonation process (O<sub>3</sub>/UV) proved to be the most effective method of RhB decolorization (90% after 30 min at dye concentration of 100 mg/L). The addition of sulfate radical precursors (sodium persulfate, PDS) to the reaction environment did not give satisfactory effects (17% after 30 min), compared to the PDS/UV system (70% after 30 min). No rhodamine B decolorization was observed using hydrogen peroxide as a sole reagent, whereas an effect on the degree of RhB degradation was observed when UV rays strike the sample with H<sub>2</sub>O<sub>2</sub> (33% after 30 min). The rhodamine B degradation process followed the pseudo-first-order kinetics model. The combined PDS/O<sub>3</sub>/UV process has shown 60% color removal after 30 min of reaction time at an initial dye concentration of 100 mg/L. A similar effectiveness was obtained by only applying ozone or UV-activated persulfate, but at a concentration 2–5 times lower (20 mg/L). The results indicated that the combined PDS/O<sub>3</sub>/UV process is a promising method for high RhB concentrations (50–100 mg/L) comparing to other alternative advanced oxidation processes.https://www.mdpi.com/2073-4344/11/8/974rhodamine Bdyeadvanced oxidation processradicalskinetics |
| spellingShingle | Piotr Zawadzki Małgorzata Deska Degradation Efficiency and Kinetics Analysis of an Advanced Oxidation Process Utilizing Ozone, Hydrogen Peroxide and Persulfate to Degrade the Dye Rhodamine B Catalysts rhodamine B dye advanced oxidation process radicals kinetics |
| title | Degradation Efficiency and Kinetics Analysis of an Advanced Oxidation Process Utilizing Ozone, Hydrogen Peroxide and Persulfate to Degrade the Dye Rhodamine B |
| title_full | Degradation Efficiency and Kinetics Analysis of an Advanced Oxidation Process Utilizing Ozone, Hydrogen Peroxide and Persulfate to Degrade the Dye Rhodamine B |
| title_fullStr | Degradation Efficiency and Kinetics Analysis of an Advanced Oxidation Process Utilizing Ozone, Hydrogen Peroxide and Persulfate to Degrade the Dye Rhodamine B |
| title_full_unstemmed | Degradation Efficiency and Kinetics Analysis of an Advanced Oxidation Process Utilizing Ozone, Hydrogen Peroxide and Persulfate to Degrade the Dye Rhodamine B |
| title_short | Degradation Efficiency and Kinetics Analysis of an Advanced Oxidation Process Utilizing Ozone, Hydrogen Peroxide and Persulfate to Degrade the Dye Rhodamine B |
| title_sort | degradation efficiency and kinetics analysis of an advanced oxidation process utilizing ozone hydrogen peroxide and persulfate to degrade the dye rhodamine b |
| topic | rhodamine B dye advanced oxidation process radicals kinetics |
| url | https://www.mdpi.com/2073-4344/11/8/974 |
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