Synergetic effect between photocatalytic degradation and adsorption processes on the removal of phenolic compounds from olive mill wastewater

► TiO2-PAC shows synergetic effect of photocatalysis adsorption processes. ► Quantum yield for direct photolysis of caffeic acid was determined. ► Higher removal of polyphenols than COD was achieved treating OMW with TiO2-PAC.