This paper reports a very high capacity and recyclable Mg-Co-Al-layered double hydroxide@ g-C3N4 nanocomposite as the new adsorbent for remediation of radioisotope-containing medical-based solutions. In this work, a convenient solvothermal method was employed to synthesize a new nano-adsorbent, whose features were determined by energy dispersive X-ray (EDS/EDX), XRD, FESEM, TEM, TGA, BET, and FT-IR spectroscopy. The as-prepared nano-adsorbent was applied to capture the radioisotope iodine-131 mainly from the medical-based wastewater under different conditions of main influential parameters, (i.e. adsorbent dose, initial I2 concentration, sonication time, and temperature). The process was evaluated by three models of RSM, CCD-ANFIS, and CCD-GRNN. Furthermore, comprehensive kinetic, isotherm, thermodynamic, reusability cycles and optimization (by GA and DF) studies were conducted to evaluate the behavior and adsorption mechanism of I2 on the surface of Mg-Co-Al-LDH@ g-C3N4 nanocomposite. High removal efficiency (95.25%) of 131I in only 30 min (i.e. during 1/384 its half-life), along with an excellent capacity that has ever been reported (2200.70 mg/g) and recyclability (seven times without breakthrough in the efficiency), turns the nanocomposite to a very promising option in remediation of 131I-containing solutions. Besides, from the models studied, ANFIS described the process with the highest accuracy and reliability with R2 > 0.999.

中文翻译：

---

使用高效且可回收的g-C3N4吸附剂与Mg-Co-Al层状双氢氧化物组装，从医疗废水中捕获I131。

本文报道了一种非常高容量且可回收的Mg-Co-Al层状双氢氧化物g-C3N4纳米复合材料，作为用于修复含放射性同位素的医用溶液的新型吸附剂。在这项工作中，采用方便的溶剂热法合成了一种新型的纳米吸附剂，其特征由能量色散X射线（EDS / EDX），XRD，FESEM，TEM，TGA，BET和FT-IR光谱确定。所制备的纳米吸附剂用于在主要影响参数（即吸附剂剂量，初始I2浓度，超声处理时间和温度）不同条件下，主要从医疗废水中捕获放射性同位素碘131。通过RSM，CCD-ANFIS和CCD-GRNN三种模型评估了该过程。此外，综合动力学，等温线，热力学，进行了可重用性循环和优化（通过GA和DF）研究，以评估I2在Mg-Co-Al-LDH @ g-C3N4纳米复合材料表面上的行为和吸附机理。仅30分钟（即半衰期的1/384）对131I的高去除率（95.25％），以及据报道的出色容量（2200.70 mg / g）和可回收性（七次没有突破）效率），将纳米复合材料变成了修复含131I溶液的非常有前途的选择。此外，从研究的模型中，ANFIS以R2> 0.999的精度和可靠性描述了该过程。在1/384的半衰期期间），以及据报道的出色容量（2200.70 mg / g）和可回收性（七次均未突破效率），使纳米复合材料成为修复131I的非常有希望的选择包含解决方案。此外，从研究的模型中，ANFIS以R2> 0.999的精度和可靠性描述了该过程。在1/384的半衰期期间），以及据报道的出色容量（2200.70 mg / g）和可回收性（七次均未突破效率），使纳米复合材料成为修复131I的非常有希望的选择包含解决方案。此外，从研究的模型中，ANFIS以R2> 0.999的精度和可靠性描述了该过程。