钌在含氮或氮硫杂环树脂上的吸附行为

Sorption Behavior of Heterocyclic Resins Containing Mitrogen or Nitrogen and Sulfur as Ligand Atoms for Ru(Ⅳ)

研究了配位原子为氮或氮硫的５种新型功能性树脂对Ｒｕ（Ⅳ）的吸附行为（３－氨甲基吡啶树脂（３－ＡＭＰＲ）、吡唑树脂（ＰＡＺＲ）、２－氨甲基吡啶树脂、Ｎ－甲基－２－硫咪唑树脂、２－硫－苯骈咪唑树脂的功能基（ＦＧ）含量为３．１６～４．８７ｍｍｏｌＦＧ／ｇ树脂），以及酸度、温度、时间对吸附的影响。测定其吸附容量、吸附比、吸附速率常数、吸附熵、分配系数和洗脱率等参数。３－ＡＭＰＲ有最高的吸附容量１．６４ｍｍｏｌＲｕ（Ⅳ）／ｇ３－ＡＭＰＲ和最低的吸附比１．９４ＦＧ／Ｒｕ（Ⅳ）（摩尔比）。吸附在ＰＡＺＲ上的Ｒｕ（Ⅳ）可被５％硫脲水溶液：丙酮：盐酸＝１：１：２（体积比）的混合溶液洗脱，洗脱率１００．３％。化学法，红外谱图阐明了树脂吸附Ｒｕ（Ⅳ）的机理。

The sorption behavior of five kinds of novel functional resins containing nitrogen or nitrogen and sulfur as ligand atoms for Ru(Ⅳ)was investigated.The resins are 3-aminomethylpyridine resin(3-AMPR),pyrazole resin(PAZR),2-aminomethyl pyridine resin(2-AMPR),N-methyl-2-thioimidazole resin(MTIR)and 2-thiobenzoimidazole resin(2-TBIMR).The functional group(FG)capacities of the resins are 3.16～4.87 m mol FG/g resin. The influences of acidity,temperature and time on sorption were studied and the sorption parameters of various resins for Ru(Ⅵ),such as sorption capacity,sorption ratio,sorption rate contant,entropy,distribution coefficient,and elution were determined.3-AMPR has the highest sorption capacity for Ru (Ⅳ),1.64 mmol Ru(Ⅳ)/g 3-AMPR,and the lowest sorption ratio,1.93 functional group/Ru(Ⅳ)(molar ratio).The Ru(Ⅳ)adsorbed on PAZR can be eluated as high as 100.3% by a mixed solution of 5%aq.thiourea:acetone:hydrochloric acid=1 1:2(volume ratiO) used as an eluant,The sorption mechanism of Ru(Ⅳ)was examined by chemical and IR-spectra methods.