| abstract |
Metal ion adsorbent that is formed by an organic polymer given a hydrophil character through a content of at an average at least 0.5 substituents per monomer unit of any of the following types: OH, 0, C0, NH 2 , NH or N so that the concentration of these groups reaches at least 25 mol-per cent and where the polymer in a non-aqueous state contains at least 10 µmol metal binding groups per gram adsorbent and where the metal binding group is characterized of 5 coordinating ligand atoms, two of these being nitrogen atoms and 3 being carboxyle acid atoms. |