Photocatalytic degradation of humic acids and landfill leachate using a solid industrial by-product containing TiO2 and Fe

▶ A by-product containing Ti and Fe was used as catalyst for landfill leachate degradation. ▶ Factors affecting yield were obtained by a fractional factorial design. ▶ Probably Fe(III) complexes have a synergistic effect on the catalytic activity of TiO2.