五种含氨基和吡啶基功能性聚合物对Ir(Ⅳ)、Ru(Ⅳ)的吸附行为  

Sorption Behaviors of Five Kinds of Functional Polymers Bearing Amino Pyridine Groups for Ir(Ⅳ) and Ru(Ⅳ) Ions

作　　者：陈义镛[1] 杨元法[2] 

机构地区：[1]杭州大学化学系,杭州310028 [2]浙江师范大学化学系

出　　处：《功能高分子学报》1996年第1期1-8,共8页Journal of Functional Polymers

基　　金：国家重点化学工程联合实验室浙江大学聚合反应工程实验室开放基金资助项目

摘　　要：五种含氨基及吡啶基功能性聚合物:2,6-二氨基吡啶树脂(DAPR),2-氨基甲基吡啶树脂(2-AMPR),2-氨基吡啶树脂(2-APR),3-氨基吡啶树脂(3-APR),4-氨基吡啶树脂(4-APR)对Ir(Ⅳ)和Ru(Ⅳ)的最佳吸附酸度均为0.1mol HCl/L、对Ir(Ⅳ)的吸附容量分别为1200、786、480、500和381mgIr(Ⅳ)/g树脂,其吸附摩尔比(离子/功能基)分别为2.11,1.20,0.67,0.81,0.59。对Ru(Ⅳ)的吸附容量分别为146,249,177,140,188mgRu(Ⅳ)/g树脂,其吸附摩尔比分别为0.49,0.72,0.47,0.43,0.56。树脂对Ir(Ⅳ)的表现吸附活化能分别为27.7±1.4,33.9±0.5,37.0±1.0,37.1±2.9,39.7±4.5kJ/mol。25℃时对Ir(Ⅳ)吸附的分配系数Kd分别为37.5×10~3,14.8×10~3,8.2×10~328.4×10~3,40.1×10~3 mL/g,吸附热焓(除2-AMPR外)均为零。这五种树脂对Tr(Ⅳ)的吸附摩尔比均大于相应的Ru(Ⅳ)。树脂吸附Ir(Ⅳ)前后的红外谱图表明有氨基吡啶功能基特征峰的消失和Ir-Cl键吸收峰在290或310cm^(-1)处产生。Five kinds of functional polymers bearing amino pyridine groups: 2,6-diaminopy-ridine (DAPR), 2-amionmethylpyridine resin (2-AMPR), 2-aminopyridine resin (2-APR), 3-amionpyridine resin (3-APR), and 4-amrnopyridine resin(4-APR) were synthesized in our lab. The optimum sorption acidities of the five resins for Ir(Ⅳ) and Ru(Ⅳ) were all at 0.1 mol HC1/L. The sorption capacities of the five resin for Ir(Ⅳ) were 1200, 786, 480, 500 and 381 mg Ir(Ⅳ)/g resin, and for Ru(Ⅳ) were 146, 249, 177, 140 and 188 mg Ru(Ⅳ)/g, respectively, and the molar ratios of sorption (ion/functional group, FG) for Ir(Ⅳ) were 2.11, 1.20, 0.67, 0.81 and 0.59, respectively. The sorption molar ratios of the five resin for Ir(Ⅳ) were large than that for Ru(Ⅳ) correspondingly. The apparent sorption acctivation energies were 27.7×1.4, 33.9×0.5, 37.0×1.0, 37.1×2.9, and 39.7×4.5 kJ/mol, individually. The distribution coefficients k d of the five resins for Ir(Ⅳ) at 25℃ were 37.5×103, 14.8×103, 8.2×103, 28.4×103 and 40.1*103 mL/g, respectively. The sorption enthalpies of the resins for Ir(Ⅳ) except 2-AMPR were zero. A newpeak at 290cm-1 appeared after Ir(Ⅳ) adsorbed by the five resins. This isthe characteristic peak of Ir-Cl bond.

关 键 词：氨基吡啶树脂 吸附 活化能 热焓 铱 铑 

分 类 号：O614.82[理学—无机化学] O633.5[理学—化学]