含氮聚醚型螯合树脂的合成及吸附性能

Synthesis and adsorption properties of polyether chelating resins containing nitrogen

通过接枝反应制备了一系列以聚环氧氟丙烷为主链，侧链末端含吡咯配位基的HPnCP（n=6．4，2）螯合树脂。各步产物的化学结构经IR和^1H NMR检测得以确认。静态吸附实验及等温吸附实验结果表明：该类树脂对Cu（Ⅱ）和Hg（Ⅱ）有着较好的吸附性能（大于1．0mmol／g）；对Co（Ⅱ）和Cd（Ⅱ）达到饱和吸附时的平衡浓度约为（0．06～0．07）mol／L；HP4CP对Co（Ⅱ）和Cd（Ⅱ）以及HP2CP对Co（Ⅱ）的等温吸附既可用Langmuir方程描述也可用Freundlich方程描述；但HP2CP时Cd（Ⅱ）的等温吸附不符合Langmuir方程，只可用Freundlich方程描述。

A series of polyether chelating resins HPnCP（n=6,4,2） with terminal pyrrole groups in the side chains were synthesized, and the chemical structure of the intermediate and target products were confirmed by IR and ^1H NMR detection. The results of static adsorption and adsorption isotherms experiments showed that the resins have higher adsorption capacity （〉1.0 mmol/g） for Cu （ Ⅱ ） and Hg（ Ⅱ ）;the equilibrium concentration of Co（Ⅱ） and Cd（Ⅱ） was （0.06-0.07） mol/l when adsorption capacity of the resins was saturated;the adsorption isotherms of HP4CP for Co（Ⅱ） and Cd （Ⅱ） and that of HP2CP for Co（Ⅱ） whereas the adsorption isotherms of equation can be described by HP2CP for Cd（Ⅱ） can uir or Freundlich isotherm equation, be described by Freundlich isotherm equation.