Mechanochemical transformation of an organic ligand on mineral surfaces: The efficiency of birnessite in catechol degradation

► A basic insight at molecular scale of the mechanically induced transformations of CAT onto birnessite is obtained. ► The abiotic degradative mechanisms of CAT onto birnessite is provided. ► The mechanically induced degradation of CAT mainly occurs via a redox reaction. ► Mechanochemistry improves the efficiency of birnessite to degrade CAT. ► The mechanochemical technique offer potentials in remediating contaminated sites.