Starch-polyacrylic acid-polyvinylsulfonic acid (St-g-PAA-PVSA) graft copoymer was synthesized by gamma radiation as an initiator. The chemical structure, morphology, and thermal stability of the graft copolymer were investigated using FTIR, SEM, and TGA. The St-g-PAA-PVSA graft copolymer was employed as an adsorbent for the removal of Co(II) and Eu(III) radionuclides from their aqueous solutions by batch adsorption method. Several experimental factors such as pH, contact time, initial concentration of adsorbate, and temperature were used to find the best conditions for the removal of Co(II) and Eu(III) radionuclides. The pseudo-second order kinetic model better fits the adsorption kinetic data of radionuclides. Langmuir models had the ability to well describe the equilibrium data of adsorption of radionuclides. Thermodynamic parameters were calculated and suggested the adsorption process of Co(II) was endothermic while exothermic in the case of Eu(III) adsorption and both adsorption systems were spontaneous in nature. Among the examined desorbing agents, both AlCl₃ and HCl were succeeded to desorb most of the radionuclides.

以γ射线为引发剂，合成了淀粉-聚丙烯酸-聚乙烯基磺酸（St-g-PAA-PVSA）接枝共聚物。采用 FTIR、SEM 和 TGA 研究了接枝共聚物的化学结构、形貌和热稳定性。St-g-PAA-PVSA接枝共聚物用作吸附剂，通过分批吸附法从水溶液中去除Co(II)和Eu(III)放射性核素。几个实验因素，如 pH 值、接触时间、吸附物的初始浓度和温度，用于寻找去除 Co(II) 和 Eu(III) 放射性核素的最佳条件。准二级动力学模型更好地拟合了放射性核素的吸附动力学数据。Langmuir 模型能够很好地描述放射性核素吸附的平衡数据。计算了热力学参数，表明 Co(II) 的吸附过程是吸热的，而在 Eu(III) 吸附的情况下是放热的，两种吸附系统本质上都是自发的。在检查的解吸剂中，AlCl₃和 HCl 成功解吸了大部分放射性核素。