Photocatalytic degradation of microcystin-LR in aqueous solutions

► Heterogeneous photocatalytic degradation of microcystin-LR. ► High degradation capacity of bench and continuous TiO2-based process. ► Residual microcystin-LR concentrations lower than 1 μg L−1. ► Multiple hydroxylations followed by elimination of labile peptide residues of the molecule.