A general term for resins that have functional groups that can form chelate bonds with metal ions. They can also be considered a type of ion exchange resin. Multidentate groups are required to form chelate bonds, so iminodicarboxylic acid groups, polyamine groups, etc. are introduced into the polymer skeleton. The stability of these ligands and metal chelates depends mainly on the type of ligand, the type of metal ion, and the pH value of the solution, so they are used to selectively adsorb, separate, concentrate, and recover metal ions. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
金属イオンとキレート結合を作ることができる官能基を有する樹脂の総称。イオン交換樹脂の一種とも考えられる。キレート結合を作るためには多座配位性基が必要であるので,イミノジカルボン酸基,ポリアミン基などが高分子骨格に導入されて用いられる。これらの配位子と金属キレートの安定度は主として配位子の種類,金属イオンの種類,溶液のpH値に依存するので,それを利用して金属イオンの選択的吸着,分離,濃縮,回収などに使用される。
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