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Ultrasound Enhanced Electro-Fenton Mineralization of Benzophenone: Kinetics and Mechanistic Analysis
https://orcid.org/0000-0002-2831-8577
https://orcid.org/0000-0001-5321-7981
In the present study, sonolysis, in combination with the electro-Fenton process, was tested for the mineralization of benzophenone-3 (BP-3). The degradation in the hybrid approach (sono-electro-Fenton) was found to be higher than in the individual approach, i.e., sonolysis alone (10%), electrochemical alone (60%), and Fenton alone (40%), owing to an increase in the formation of the hydroxyl radicals. BP-3 degradation efficiency was found to be 98.7%, and chemical oxygen demand (COD) removal efficiency was 80% using hybrid sono-electro-Fenton process at operating conditions of ultrasonic power = 100 W, current density = 213 A m–2, Fe2+ = 8 mg L–1, pH = 3, and H2O2 = 400 mg L–1. The degradation kinetics were best-represented by the power-law model with the order of reaction being 1.1. A total of six intermediate products were detected using liquid chromatography quadrupole time-of-flight mass spectroscopy. The degradation pathway of BP-3 has also been proposed based on identified intermediate products. The degradation of benzophenone-3 was found to be accelerated by the use of ultrasound in combination with the electro-Fenton process. Biodegradability indices, i.e., carbon oxidation state value increased from −0.8 to +3.5, indicating the increase in biodegradability of the wastewater after treatment.
Ultrasound in combination with electro-Fenton process intensifies the treatment of the benzophenone-3 containing wastewater along with the reduction in electrode fouling and mass transfer resistances.
Ultrasound Enhanced Electro-Fenton Mineralization of Benzophenone: Kinetics and Mechanistic Analysis
https://orcid.org/0000-0002-2831-8577
https://orcid.org/0000-0001-5321-7981
In the present study, sonolysis, in combination with the electro-Fenton process, was tested for the mineralization of benzophenone-3 (BP-3). The degradation in the hybrid approach (sono-electro-Fenton) was found to be higher than in the individual approach, i.e., sonolysis alone (10%), electrochemical alone (60%), and Fenton alone (40%), owing to an increase in the formation of the hydroxyl radicals. BP-3 degradation efficiency was found to be 98.7%, and chemical oxygen demand (COD) removal efficiency was 80% using hybrid sono-electro-Fenton process at operating conditions of ultrasonic power = 100 W, current density = 213 A m–2, Fe2+ = 8 mg L–1, pH = 3, and H2O2 = 400 mg L–1. The degradation kinetics were best-represented by the power-law model with the order of reaction being 1.1. A total of six intermediate products were detected using liquid chromatography quadrupole time-of-flight mass spectroscopy. The degradation pathway of BP-3 has also been proposed based on identified intermediate products. The degradation of benzophenone-3 was found to be accelerated by the use of ultrasound in combination with the electro-Fenton process. Biodegradability indices, i.e., carbon oxidation state value increased from −0.8 to +3.5, indicating the increase in biodegradability of the wastewater after treatment.
Ultrasound in combination with electro-Fenton process intensifies the treatment of the benzophenone-3 containing wastewater along with the reduction in electrode fouling and mass transfer resistances.
Ultrasound Enhanced Electro-Fenton Mineralization of Benzophenone: Kinetics and Mechanistic Analysis
https://orcid.org/0000-0002-2831-8577
https://orcid.org/0000-0001-5321-7981
In the present study, sonolysis, in combination with the electro-Fenton process, was tested for the mineralization of benzophenone-3 (BP-3). The degradation in the hybrid approach (sono-electro-Fenton) was found to be higher than in the individual approach, i.e., sonolysis alone (10%), electrochemical alone (60%), and Fenton alone (40%), owing to an increase in the formation of the hydroxyl radicals. BP-3 degradation efficiency was found to be 98.7%, and chemical oxygen demand (COD) removal efficiency was 80% using hybrid sono-electro-Fenton process at operating conditions of ultrasonic power = 100 W, current density = 213 A m–2, Fe2+ = 8 mg L–1, pH = 3, and H2O2 = 400 mg L–1. The degradation kinetics were best-represented by the power-law model with the order of reaction being 1.1. A total of six intermediate products were detected using liquid chromatography quadrupole time-of-flight mass spectroscopy. The degradation pathway of BP-3 has also been proposed based on identified intermediate products. The degradation of benzophenone-3 was found to be accelerated by the use of ultrasound in combination with the electro-Fenton process. Biodegradability indices, i.e., carbon oxidation state value increased from −0.8 to +3.5, indicating the increase in biodegradability of the wastewater after treatment.
Ultrasound in combination with electro-Fenton process intensifies the treatment of the benzophenone-3 containing wastewater along with the reduction in electrode fouling and mass transfer resistances.
Ultrasound Enhanced Electro-Fenton Mineralization of Benzophenone: Kinetics and Mechanistic Analysis
Patidar, Ritesh (Autor:in) / Srivastava, Vimal Chandra (Autor:in)
ACS ES&T Water ; 3 ; 1595-1609
09.06.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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