The Use of Magnetic Nanomaterials for the Retaining of Cu(II) Ions out of Residual Water - SIMONESCU, Claudia Maria; GHEORGHE, Florea; PARASCHIV, Elena; PĂUNESCU, Victor; CUCU, Teodora (The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, 2011)