The Research on the treatment of wastewater from production of plastic abrasives by Fenton reagent

The Fenton reagent was used for the treatment of high concentration organic wastewater from production of plastic abrasives. The effect of reaction time, pH value, dosage of H₂O₂, the mol ratio between H₂O₂ and Fe²⁺, reaction temperature and adding ways of H₂O₂ on COD removal efficiency was studied. The mechanism of the affecting factors was also analyzed. The optimal operational condition was determined as follows: At room temperature, the mass concentration of H₂O₂ (30%) is 40 mg/L and its adding way was batch feeding; the initial pH value of the wastewater was adjusted to 4.0, the mol ratio between H₂O₂ and Fe²⁺, was 12:1, and reaction time was 45 min. Under the optimum operational condition, the COD removal efficiency reached 91.57%. So it is feasible to treat high concentration organic wastewater from production of plastic abrasives by Fenton reagent.