Heterogeneous degradation of precipitated hexamine from wastewater by catalytic function of silicotungstic acid in the presence of H2O2 and H2O2/Fe2+

► Hexamine was degraded by H2O2 and H2O2/Fe2+ under silicotungstic acid catalysis. ► Mineralization up to 70% was achieved in the presence of H2O2/Fe2+. ► This process is more efficient than the traditional Fenton process. ► Silicotungstic acid can be recycled and reused. ► Kinetic study based on TOC reduction was done and two steps mechanism was proposed.