| abstract |
PROBLEM TO BE SOLVED: To provide a cationic ion adsorbent having sufficient adsorption performance for cationic ions, sufficient desorption performance for cationic ions, heat desorption, and high adsorption and desorption speed. An α, β-ethylenically unsaturated monomer having a dibasic acid group, an α, β-ethylenically unsaturated monomer having a reactive group capable of forming a bridge, and / or two The above-mentioned monomer having an α, β-ethylenically unsaturated group and, if necessary, a crosslinked copolymer comprising an α, β-ethylenically unsaturated monomer that can be copolymerized with the monomer. A thermally desorbable cationic ion adsorbent comprising a polymer and / or a copolymer crosslinked by a post-treatment reaction. [Selection figure] None |