论文部分内容阅读
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 amino- and pyridyl-containing functional polymers: 2,6-diaminopyridine resin (DAPR), 2-aminomethylpyridine resin (2-AMPR), 2-aminopyridine resin The best adsorptive acidity of Ir (Ⅳ) and Ru (Ⅳ) was 0.1 mol HCl / L for 3-APR and 4-APR. The adsorption capacity of Ir (Ⅳ) 1200, 866, 480, 500 and 381 mg Ir (IV) / g resin, respectively. The adsorption molar ratio (ion / functional group) was 2.11, 1.20, 0.67, 0.81 and 0.59, respectively. The adsorption capacity of Ru (Ⅳ) were 146,249,177,140,188mgRu (Ⅳ) / g resin respectively, and the adsorption molar ratios were 0.49,0.72,0.47,0.43,0.56 respectively. The adsorption activation energies of resin for Ir (Ⅳ) were 27.7 ± 1.4,33.9 ± 0.5,37.0 ± 1.0,37.1 ± 2.9,39.7 ± 4.5kJ / mol, respectively. The partition coefficients Kd for Ir (Ⅳ) adsorption at 25 ℃ were 37.5 × 10 ~ 3, 14.8 × 10 ~ 3, 8.2 × 10 ~ 328.4 × 10 ~ 3 and 40.1 × 10 ~ 3 mL / g, respectively. The adsorption enthalpy Except for 2-AMPR) are zero. The adsorption molar ratio of these five resins to Tr (Ⅳ) is larger than that of the corresponding Ru (Ⅳ). The IR spectra of the resin before and after Ir (Ⅳ) adsorption showed that the disappearance of the characteristic peak of the aminopyridine functional group and the absorption peak of Ir-Cl bond occurred at 290 or 310 cm -1.