Removal of leather tanning agent syntan from aqueous solution using Fenton oxidation followed by GAC adsorption

The optimum conditions for the removal of leather tanning agent syntan from aqueous solution by Fenton oxidation at 22 °C for an initial syntan concentration of 500 mg/L were pH 3, and concentrations of H 2 O 2 and FeSO 4 of 300 mg/L and 500 mg/L, respectively. Fenton oxidation followed by granular activated carbon (GAC) adsorption in fixed-bed column resulted in more than 95% removal of dissolved organic carbon, compared to 55–70% removal by Fenton oxidation alone and GAC adsorption alone. The removal of individual organic fractions was also higher for the combined treatment compared to the Fenton oxidation alone.