Study on Treatment Performance of Desulfurization Wastewater by Zero-Valent Iron Fenton-like Process

In this study, the zero-valent iron Fenton reagent (ZVI Fenton-like) system was combined with the chemical precipitation method for the deep treatment of desulfurization wastewater from coal-fired power plants, and the chemical oxygen demand (COD) was used as the evaluation criterion for organic matter in the desulfurization wastewater. The effects of reaction time, H2O2 dosage, zero-valent iron dosage, pH, and reaction temperature were also investigated. The results showed that the COD concentration of the effluent was the lowest when the running time of the ZVI Fenton-like reagent system was 1 h, the dosage of H2O2 was 33.3 mg center dot L-1, the dosage of iron was 0.075 g center dot L-1, the pH was 4.5 similar to 6.5, the reaction temperature was 35 degrees C, the COD concentration of the wastewater was the lowest and its operating conditions were the best, and the internal reaction mechanism was finally deduced. In summary, the zero-valent iron Fenton reagent system provides a new idea for the treatment of desulfurization wastewater from coal-fired power plants.

Automated summary

In this study, the combination of zero-valent iron Fenton reagent (ZVI Fenton-like) system and chemical precipitation method was used for the treatment of desulfurization wastewater from coal-fired power plants by evaluating the organic matter through chemical oxygen demand (COD). The study investigated the effects of reaction time, H2O2 dosage, zero-valent iron dosage, pH, and reaction temperature. The results showed that the optimal operating conditions were achieved when the ZVI Fenton-like reagent system ran for 1 hour, with H2O2 dosage of 33.3 mg/L, iron dosage of 0.075 g/L, pH ranging from 4.5 to 6.5, and reaction temperature of 35°C. The study provides a new approach for the treatment of desulfurization wastewater from coal-fired power plants.