The Effect of ZVI and H2O2 Concentrations on Chemical Oxygen Demand and Color Removal With Fenton-Like Process From Leachate

Leachate are difficult to treat due to their complex structures and having high pollutants concentrations. In this study; color and chemical oxygen demand (COD) removal were studied from the leachate by Fenton-like oxidation. The effect of zero -valent iron (ZVI) and H2O2 concentrations on color and COD removal was investigated. The color removal was conducted at three different wavelengths of 436, 525 and 620 nm, respectively. The highest COD (74.4%) and color removal (71% at 436 nm, 80.3% at 525 nm and 87.9% at 620 nm) were determined at concentration of 0.05 g/L ZVI. Increasing of H2O2 concentration up to 200 mg/L also increased color and COD removal. Optimum values were 0.05 g/L and 150 mg/L for ZVI and H2O2 at a reaction time of 20 minutes and pH=2.0 and total organic carbon (TOC) removal was also determined at about 50%.