Researchers studied how to clean up coking wastewater using a process called Fenton oxidation. They found that adding specific amounts of hydrogen peroxide and iron can greatly reduce the pollutants in the water. The best results were achieved at a pH of 3, with 72.7% of the pollutants removed when the right amounts of chemicals were used. This method effectively gets rid of tough organic compounds in coking wastewater, making it a good way to treat this type of polluted water.