Realizing highly effective and selective enrichment of radioactive Cs(I) in complex environmental systems and exploring the microscale adsorption mechanism of Cs(I) on adsorbing material is the key point for developing highly efficient materials for Cs(I) adsorption. In addition, the low cytotoxicity of materials is essential for practical applications and environmental protection. In this study, the controlled assembly of bentonite carrier with a highly selective substance of Cs(I) is prepared by in-situ synthesis method in order to construct a low-toxic functional clay material with high adsorption capacity and selectivity of Cs(I) in complex environmental systems. The efficiency of the zinc hexacyanoferrate(III)-grafted magnetic bentonite (denoted as ZHF/MB) composite was evaluated in adsorption isotherm studies, kinetics analyses, and selectivity tests by using the batch technique. The toxicity of the ZHF/MB composite was evaluated through in vitro cytotoxicity assays using human hepatic cells (HepG2 cells). The results revealed that the ZHF/MB composite had not only a higher adsorption capacity (1.638 mmol/g, 60 °C) for Cs⁺ ions than a number of other natural and manmade materials but also no cytotoxicity in human cells. In addition, the ZHF/MB composite showed excellent selectivity for Cs⁺ with a removal efficiency of over 90% from solution (m/V = 0.4 g/L, [Mⁿ⁺]_initial = 10 mg/L, Mⁿ⁺= Cs⁺, Ni²⁺,Sr²⁺, Co²⁺). The promising safe toxicology profile, remarkable Cs⁺ adsorption efficiency, and excellent selectivity of the ZHF/MB composite demonstrate its great potential for using as a decorporation agent for radioactive cesium remediation. The implementation of this research will provide new adsorption materials and method for radioactive Cs(I) waste management.

在复杂的环境系统中实现放射性Cs（I）的高效选择性富集并探索Cs（I）在吸附材料上的微观吸附机理是开发高效的Cs（I）吸附材料的关键。此外，材料的低细胞毒性对于实际应用和环境保护至关重要。在这项研究中，通过原位合成方法制备了具有高选择性Cs（I）的膨润土载体的可控组件，以构建具有高吸附能力和Cs（I）选择性的低毒功能性粘土材料。在复杂的环境系统中。吸附等温线研究，动力学分析，六价铁氰化锌（III）接枝磁性膨润土（表示为ZHF / MB）复合材料的效率进行了评估，使用批处理技术进行选择性测试。ZHF / MB复合材料的毒性通过使用人肝细胞（HepG2细胞）的体外细胞毒性试验进行评估。结果表明ZHF / MB复合材料不仅具有较高的Cs吸附能力（1.638 mmol / g，60°C）⁺离子比许多其他天然和人造材料更对人体细胞无细胞毒性。此外，ZHF / MB复合材料对Cs ⁺表现出优异的选择性，从溶液中的去除效率超过90％（m / V = 0.4 g / L，[M ^{n +} ]_初始 = 10 mg / L，M ^{n +} = Cs ⁺，Ni 2 ⁺，Sr 2 ⁺，Co ²⁺）。有前途的安全毒理学特征，卓越的Cs ⁺ZHF / MB复合材料的吸附效率和出色的选择性证明了其用作放射性铯修复的脱附剂的巨大潜力。这项研究的实施将为放射性Cs（I）废物管理提供新的吸附材料和方法。