研究目的
The objectives were: (1) to assess the effect of UV irradiation on dye degradation using the PEF process, (2) to establish the constant current that produces the optimal molar hydrogen peroxide to ferrous ion ratio for maximizing dye degradation, and (3) to gain insights into the kinetics and mechanisms of OG degradation by EF processes.
研究成果
The PEF process was more effective than the EF in OG mineralization, with higher decolorization and TOC removal rates. The optimal conditions were identified, and the kinetics of degradation were elucidated, highlighting the role of OH radicals in the process.
研究不足
The study focused on the degradation of a specific azo dye (Orange G) under controlled conditions. The applicability to other dyes or real wastewater matrices was not explored. The process requires optimization of current density and UV irradiation for maximum efficiency.
1：Experimental Design and Method Selection:
The study used a photoelectro-Fenton (PEF) process with a stainless steel anode and graphite cathode for the degradation of Orange G (OG). The effect of UV irradiation was compared with the electro-Fenton (EF) process.
2：Sample Selection and Data Sources:
The azo dye Orange G was used as the model pollutant. The experiments were conducted in an undivided two-electrode cell with a total reactor volume of 200 mL.
3：List of Experimental Equipment and Materials:
Stainless steel (SUS304) rod and graphite rod were used as electrodes. A medium-pressure mercury lamp was used for UV irradiation.
4：Experimental Procedures and Operational Workflow:
Experiments were carried out at constant current, with the generation of Fe2+ and H2O2 monitored. OG degradation was assessed under various conditions.
5：Data Analysis Methods:
The concentrations of Fe2+ and H2O2 were determined by specific methods, and OG degradation was monitored using spectrophotometry and TOC analysis.
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