Optimization of Fenton oxidation process for treatment of hexogeon industrial wastewater using response surface methodology

Abstract

Fenton oxidation technology was applied to treat hexogeon industrial wastewater and response surface methodology was used to optimize the effects of the FeSO₄ concentration, H₂O₂ concentration, pH value, and temperature. A quadratic model was obtained as the result of this design. In the optimization, the coefficient of variation is only 3.17%, indicating a good precision and reliability of the experimental. The coefficient of association (R²) and adj-R² for quadratic model were evaluated quite satisfactorily as 0.98 and 0.96, respectively. The predicted optimum conditions were determined as 763 mg L⁻¹ of FeSO₄ concentration, 107 mg L⁻¹ of H₂O₂ concentration, 2.64 of pH, and 19°C with 83.5% of chemical oxygen demand removal. The experimental result was 82.92% under optimizing reaction factors.

Keywords:

• Hexogeon industrial wastewater
• Fenton
• Response surface methodology
• Optimization

Acknowledgments

This work is supported by the National Nature Science Foundations of China (No: 21006057 and 21076063) and Henan Provincial Science and Technology Foundation (No: 142102210427 and 142300410202).