Heat and iron-activated persulfate for Orange G degradation: Kinetics and synergy effect studies
This study explores the advanced oxidation process degradation of Orange G (OG) in an aqueous solution using heat activated persulfate (PS) oxidation. Many factors, including reaction temperature (20–70°C), pH (2−12), potassium persulfate (PSP) dosage (100–1000 mg.L−1), initial OG concentration (10–...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-04-01
|
| Series: | Desalination and Water Treatment |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1944398625001067 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849471316418101248 |
|---|---|
| author | Nesrine Bougouizi Fatiha Ahmedchekkat Mahdi Chiha |
| author_facet | Nesrine Bougouizi Fatiha Ahmedchekkat Mahdi Chiha |
| author_sort | Nesrine Bougouizi |
| collection | DOAJ |
| description | This study explores the advanced oxidation process degradation of Orange G (OG) in an aqueous solution using heat activated persulfate (PS) oxidation. Many factors, including reaction temperature (20–70°C), pH (2−12), potassium persulfate (PSP) dosage (100–1000 mg.L−1), initial OG concentration (10–70 mg/L), FeSO4.7H2O (10–50mg/L) and (NH4)2Fe (SO4)2 (8–100 mg/L), as well as the impact of organic additions, were examined to determine their effectiveness. According to our results, OG oxidation followed a pseudo-first-order kinetic model, exhibiting a strong correlation coefficient (R2=0.99). Complete decolorisation of 50 mg/L OG was achieved in 150 min and 240 min at reaction temperatures of 70°C and 65°C, respectively, in the presence of 1 g/L of PS. The apparent activation energy was found to be 157.3 kJ/mol. Furthermore, the results suggest a direct correlation between OG oxidation and high initial PS concentrations, while an inverse relationship was observed with initial substrate concentrations. In addition, higher reaction temperatures and a neutral initial pH favoured OG degradation. Furthermore, the results demonstrated that the sulfate radical SO4•− was responsible for OG oxidation. Moreover, the coexistence of ferrous ions and PSP at high temperatures synergistically accelerated the OG oxidation. These results suggest that the heat/PS process and/or the PS/heat/ Fe2+ process holds great promise for reducing azo dyes in aqueous media. |
| format | Article |
| id | doaj-art-e8de5f2e986d447699b0fac334097ca1 |
| institution | Kabale University |
| issn | 1944-3986 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Desalination and Water Treatment |
| spelling | doaj-art-e8de5f2e986d447699b0fac334097ca12025-08-20T03:24:52ZengElsevierDesalination and Water Treatment1944-39862025-04-0132210109010.1016/j.dwt.2025.101090Heat and iron-activated persulfate for Orange G degradation: Kinetics and synergy effect studiesNesrine Bougouizi0Fatiha Ahmedchekkat1Mahdi Chiha2Laboratory of Anticorrosion-Materials, Environment and Structure (LAMES-E1061500-research group E1061503), Chemical Engineering Department, Faculty of Technology, University of 20 Août 1955-Skikda, P.O. Box 26, Skikda 21000, Algeria; Chemistry Department, Faculty of Science, University of 20 Aout 1955-Skikda, P.O. Box 26, Skikda 21000, Algeria; Laboratoire de Recherche sur la Physico-Chimie des Surfaces et Interfaces (LRPCSI), University of 20 Aout 1955-Skikda, P.O. Box 26, Skikda 21000, AlgeriaLaboratory of Anticorrosion-Materials, Environment and Structure (LAMES-E1061500-research group E1061503), Chemical Engineering Department, Faculty of Technology, University of 20 Août 1955-Skikda, P.O. Box 26, Skikda 21000, Algeria; Corresponding authors.Laboratory of Anticorrosion-Materials, Environment and Structure (LAMES-E1061500-research group E1061503), Chemical Engineering Department, Faculty of Technology, University of 20 Août 1955-Skikda, P.O. Box 26, Skikda 21000, Algeria; Corresponding authors.This study explores the advanced oxidation process degradation of Orange G (OG) in an aqueous solution using heat activated persulfate (PS) oxidation. Many factors, including reaction temperature (20–70°C), pH (2−12), potassium persulfate (PSP) dosage (100–1000 mg.L−1), initial OG concentration (10–70 mg/L), FeSO4.7H2O (10–50mg/L) and (NH4)2Fe (SO4)2 (8–100 mg/L), as well as the impact of organic additions, were examined to determine their effectiveness. According to our results, OG oxidation followed a pseudo-first-order kinetic model, exhibiting a strong correlation coefficient (R2=0.99). Complete decolorisation of 50 mg/L OG was achieved in 150 min and 240 min at reaction temperatures of 70°C and 65°C, respectively, in the presence of 1 g/L of PS. The apparent activation energy was found to be 157.3 kJ/mol. Furthermore, the results suggest a direct correlation between OG oxidation and high initial PS concentrations, while an inverse relationship was observed with initial substrate concentrations. In addition, higher reaction temperatures and a neutral initial pH favoured OG degradation. Furthermore, the results demonstrated that the sulfate radical SO4•− was responsible for OG oxidation. Moreover, the coexistence of ferrous ions and PSP at high temperatures synergistically accelerated the OG oxidation. These results suggest that the heat/PS process and/or the PS/heat/ Fe2+ process holds great promise for reducing azo dyes in aqueous media.http://www.sciencedirect.com/science/article/pii/S1944398625001067Orange GHeat-activated persulfateKineticsSulfate radicalsSynergy |
| spellingShingle | Nesrine Bougouizi Fatiha Ahmedchekkat Mahdi Chiha Heat and iron-activated persulfate for Orange G degradation: Kinetics and synergy effect studies Desalination and Water Treatment Orange G Heat-activated persulfate Kinetics Sulfate radicals Synergy |
| title | Heat and iron-activated persulfate for Orange G degradation: Kinetics and synergy effect studies |
| title_full | Heat and iron-activated persulfate for Orange G degradation: Kinetics and synergy effect studies |
| title_fullStr | Heat and iron-activated persulfate for Orange G degradation: Kinetics and synergy effect studies |
| title_full_unstemmed | Heat and iron-activated persulfate for Orange G degradation: Kinetics and synergy effect studies |
| title_short | Heat and iron-activated persulfate for Orange G degradation: Kinetics and synergy effect studies |
| title_sort | heat and iron activated persulfate for orange g degradation kinetics and synergy effect studies |
| topic | Orange G Heat-activated persulfate Kinetics Sulfate radicals Synergy |
| url | http://www.sciencedirect.com/science/article/pii/S1944398625001067 |
| work_keys_str_mv | AT nesrinebougouizi heatandironactivatedpersulfatefororangegdegradationkineticsandsynergyeffectstudies AT fatihaahmedchekkat heatandironactivatedpersulfatefororangegdegradationkineticsandsynergyeffectstudies AT mahdichiha heatandironactivatedpersulfatefororangegdegradationkineticsandsynergyeffectstudies |