Elimination of radioactive ions from wastewater using powerful adsorbents is of great importance for reducing the environmental pollution. Within this context, Bentonite (BNT)-Gum Arabic (GA) composite was developed as a new adsorbent to excellently eliminate Th(IV) ions from aqueous media. The produced composite adsorbent was examined by FTIR and SEM/EDX techniques. The effects of main empirical parameters on the adsorption efficiency were optimized by factorial design analysis. The maximum elimination capacity of BNT-GA was determined as 885.4 mg g⁻¹ at pH 4.5, in 30 min, and 24 °C. Thermodynamic studies showed that Th(IV) adsorption progressed exothermically and the spontaneity of the process was lessened with the increase in temperature. Kinetic findings exposed that the adsorption mechanism fits perfectly with the pseudo-second-order (PSO) model. A 96% part of the adsorbed Th(IV) ions was recovered from the composite adsorbent using 1.0 M HCl. The produced composite revealed remarkable adsorption/desorption efficiency even after 7 cycles. All results show that the prepared BNT-GA compound can be used for the effective exclusion of Th(IV) ions from wastewater due to its advantageous properties such as great elimination capacity, cost-effectiveness, and facile preparation.

使用强力吸附剂去除废水中的放射性离子对于减少环境污染具有重要意义。在此背景下，膨润土 (BNT)-阿拉伯胶 (GA) 复合材料被开发为一种新型吸附剂，可从水性介质中出色地消除 Th(IV) 离子。通过FTIR和SEM/EDX技术检查生产的复合吸附剂。通过析因设计分析，优化了主要经验参数对吸附效率的影响。BNT-GA的最大消除能力确定为885.4 mg g ^-1在 pH 4.5、30 分钟和 24 °C。热力学研究表明，Th(IV)吸附以放热方式进行，并且该过程的自发性随着温度的升高而降低。动力学发现表明吸附机制与伪二阶 (PSO) 模型完全吻合。使用 1.0 M HCl 从复合吸附剂中回收了 96% 的吸附 Th(IV) 离子。生产的复合材料即使在 7 个循环后也显示出显着的吸附/解吸效率。所有结果表明，所制备的 BNT-GA 化合物具有去除能力强、成本效益高、制备简便等优点，可用于有效去除废水中的 Th(IV) 离子。