The Z–nZVI and Mt–nZVI composites showed a high efficiency in the removal of Pb2+ present in aqueous solutions.
The fastest removal of Pb2+ was obtained with Mt–nZVI.
The adsorption intensity increased 300 times in the composites, respect to the pristine materials.
The magnetic behavior of the composites reveals a high presence of nZVI particles.
These composites have potential industrial and environmental applications.