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This study aims to optimize the process parameters by central composite design (CCD) for the degradation of synthetic effluent containing rhodamine 6G (R6G), a xanthene-based cationic dye during electro-Fenton (EF) treatment. The CCD technique of response surface methodology was employed to assess the impact of most important key variables, such as initial pH, current, H2O2 concentration, and reaction time during EF treatment and shows significant removal efficiency at optimum conditions. The statistical model flanked the optimal conditions to find the maximum degradation. Moreover, photoelectro-Fenton (PEF) treatment was also performed using UV irradiation at optimized process conditions of EF treatment. EF showed significantly lower degradation efficiency of R6G than PEF, confirming that the application of UV irradiation, was beneficial to achieve greater degradation efficiency of R6G. Good agreement between model predictions and experimental results confirms CCD reliability.

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Statistical Optimization of Parameters Using Central Composite Design for Enhanced Degradation of Rhodamine 6G in Aqueous Solution: A Comparative Study of Electro-Fenton and Photoelectro-Fenton Processes

  • 会议论文

  • 发表日期：

    2026年

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  • Vishal Kumar Sandhwar,
  • Diksha Saxena,
  • Anand Joshi,
  • Unnati Joshi,
  • Prince Jain,
  • Nitesh Chauhan,
  • Alok Tiwari

摘要

This study aims to optimize the process parameters by central composite design (CCD) for the degradation of synthetic effluent containing rhodamine 6G (R6G), a xanthene-based cationic dye during electro-Fenton (EF) treatment. The CCD technique of response surface methodology was employed to assess the impact of most important key variables, such as initial pH, current, H2O2 concentration, and reaction time during EF treatment and shows significant removal efficiency at optimum conditions. The statistical model flanked the optimal conditions to find the maximum degradation. Moreover, photoelectro-Fenton (PEF) treatment was also performed using UV irradiation at optimized process conditions of EF treatment. EF showed significantly lower degradation efficiency of R6G than PEF, confirming that the application of UV irradiation, was beneficial to achieve greater degradation efficiency of R6G. Good agreement between model predictions and experimental results confirms CCD reliability.