Evaluating Prussian blue analogues MII3[MIII(CN)6]2 (MII = Co, Cu, Fe, Mn, Ni; MIII = Co, Fe) as activators for peroxymonosulfate in water

[Fe(CN)₆] and [Co(CN)₆]-based Prussian blue analogues (PBAs) were prepared with various metal ions (i.e., Co, Cu, Fe, Mn and Ni) and evaluated as catalysts to activate an important oxidant, peroxymonosulfate (PMS).