Different eco-sustainable methods based on the activation of H2O2 promoted by iron species in homogeneous and heterogeneous phase, in the presence and absence of solar irradiation was compared in order to evaluate their effectiveness in the wastewater treatment. Commercial linear alkylbenzene sulphonic acids (LAS) have been chosen as model compound, being a pollutant largely used in different fields. Supported iron species were identified as new promising class of photo-activable and recyclable catalysts.