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研究了D201×4树脂对铼(Ⅶ)的吸附性能,实验结果表明,在pH=2.7的HAc-NaAc缓冲体系中,静态饱和交换容量为634mg/g树脂;用4.0mol/LNaOH作为解吸剂,一次解吸率达93.5%;等温吸附服从Freundlich经验式;反应开始阶段的表观吸附速率常数k298K=9.58×10-5s-1;反应的△H=-12.10kJ/mol;吸附物中树脂功能基与Re(Ⅶ)的摩尔比约为1:1,并用红外光谱初步探讨了树脂吸附铼的反应机理。
The adsorption capacity of D201 × 4 resin to rhenium (Ⅶ) was studied. The experimental results showed that the static saturated exchange capacity of the resin was 634 mg / g in HAc-NaAc buffer system with pH = 2.7. With 4.0 mol / L NaOH as desorbent, The desorption rate was 93.5%. The isotherm adsorption obeys Freundlich empirical formula. The apparent adsorption rate constant k298K = 9.58 × 10-5s-1 at the beginning of the reaction and ΔH = -12.10kJ / mol. The resin functional groups And Re (Ⅶ) molar ratio of about 1: 1, and infrared spectroscopy preliminary study of the reaction mechanism of rhenium adsorption resin.