“…The removal of more than 70 environmental contaminants has been already reported [3]. From these contaminants especially polychlorinated hydrocarbons (e.g., [1,2,[4][5][6][7][8]), highly toxic substances like As(III), As(V), Cu(II), Co(II), Cr(VI) (e.g., [9][10][11][12][13][14][15]), nitrite [16], amoxicillin and ampicillin [17], metronidazole [18], TNT [19], pesticides [20] or cyanobacteria [21] should be mentioned. However, efficiency of the nZVI particles is strongly dependent not only on their size and concentration in dispersions but also on their ability to migrate through saturated porous media.…”