A study looked at treating coking wastewater using a method called Fenton oxidation-flocculation. By adjusting the amount of hydrogen peroxide, the ratio of Fe2+/H2O2, the dosage of PFS, pH, and reaction time, researchers found the right conditions to remove 90.7% of TOC and 72.7% of COD from the wastewater. The treated COD met the highest quality standards for wastewater discharge.