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介绍了含吡啶基吸附材料对金属离子、无机阴离子及有机污染物的吸附分离研究进展。吡啶环的氮原子具有较强的配位功能,能与多种金属离子形成络合物。这类吸附材料对金属离子显示出高的吸附容量和吸附选择性,其吸附金属离子后形成金属主体高分子,然后再利用金属离子与具有配位性能的无机阴离子、有机污染物通过路易斯酸-碱在水溶液中进行配体交换,从而达到吸附分离的目的。作为高分子交换配体(PLE),这类新型吸附材料将是今后发展的重点。
The progress of adsorption and separation of metal ions, inorganic anions and organic pollutants with pyridyl-based adsorbents was introduced. The nitrogen atom of the pyridine ring has a strong coordination function and can form complexes with various metal ions. Such adsorbent material shows high adsorption capacity and adsorption selectivity to metal ions, which adsorb metal ions to form metal host polymers, and then use metal ions and inorganic anions with coordination properties. The organic pollutants pass through Lewis acid- Alkali in aqueous solution for ligand exchange, so as to achieve the purpose of adsorption separation. As a polymer exchange ligand (PLE), these new adsorbent materials will be the focus of future development.