The researchers studied how to clean up oil extraction wastewater using chemicals and a process called Fenton oxidation. They found that the best conditions for cleaning the water were room temperature, a certain amount of Fe Cl3 and PAM chemicals, and a neutral p H level. Under these conditions, they were able to remove almost all of the cloudiness and more than half of the pollutants in the water. By using Fenton oxidation on top of the chemical treatment, they were able to remove even more pollutants, reaching a removal rate of almost 65%.