For almost three decades, engineered nanoparticles (ENM’s) have been the subject of intensive research due to their chemical reactivity and their sorption, catalytic, electronic, optical, magnetic and other unique properties. The results obtained indicate that they provide a new tool for the remediation of contaminated aquatic ecosystems (surface and groundwater), sediments, soil training grounds as well as waste recycling areas, e.g. for electronic. The application of in situ restorative technologies using compositions involving metal nanoparticles, mainly iron nanoparticles (n-ZVI, nano zero-valent iron) is becoming more common. Solutions proposed in a number of publications and patents show the versality, reater efficiency and lower costs of the remediation process, compared with conventional methods.