Abstract
In the present study, the authors have newly developed polarity-composite hydrogels and have investigated their adsorption properties of the positive and negative rare-metal ions in order to search for the functional materials serviceable to effective and simple heavy-metal and rare-metal recycling systems. In the present study, it has been revealed that the newly developed polarity-composite hydrogels show high adsorption efficiencies of both of the positive and negative rare-metal ions which are comparable to the single-polarity hydrogels having been investigated by the authors. The features observed in the present study have demonstrated the newly developed hydrogels’ potential to be utilized in the recycling system from industrial wastes often called as “urban mine.”
