To improve operability as well as the removal efficiency for cesium ions in the wastewater treatment, a novel electrochemically switched ion exchange (ESIX) technique by using electroactive Prussian-blue(PB)-based magnetic microparticles (PB@Fe₃O₄ microparticle) with different uniform particle sizes in the range of 300–900 nm as the adsorption materials was developed. The obtained PB@Fe₃O₄ microparticle were characterized by Scanning electron microscopy (SEM), Transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and Thermogravimetric analysis (TGA). It is found that the PB can be well coated on the surface of Fe₃O₄ microsphere, which can be easily adsorbed on the magnetic electrode substrate for the electrochemical adsorption of Cs⁺ ions. Electrochemical adsorption of 97% Cs⁺ on PB/Fe₃O₄ was achieved in less than 10 min, and the maximum adsorption capacity was 16.13 mg/g, and the distribution coefficient (K_D) of Cs⁺ ions reached as high as 3938. In addition, the electrochemical adsorption behavior of PB@Fe₃O₄ microparticle fitted well with the Freundlich adsorption isotherm and the Pseudo-second-order kinetic models. It is expected that such an ESIX technique using PB@Fe₃O₄ microparticle can be applied for the separation and recovery of dilute Cs⁺ ions from cesium-contaminated solution in a practical process.

为了提高废水处理中铯离子的可操作性和去除效率，通过使用基于电活性普鲁士蓝（PB）的磁性微粒（PB @ Fe ₃ O ₄微粒）和一种新型的电化学开关离子交换（ESIX）技术随着吸附材料的发展，在300-900 nm范围内形成了不同的均匀粒径。通过扫描电子显微镜（SEM），透射电子显微镜（TEM），傅里叶变换红外光谱（FT-IR），X射线衍射（XRD）和热重分析（TGA）对所得的PB @ Fe ₃ O ₄微粒进行表征。 。发现PB可以很好地涂覆在Fe ₃ O ₄的表面上微球，可以很容易地吸附在磁性电极基板上，用于Cs ⁺离子的电化学吸附。在不到10分钟的时间内，PB / Fe ₃ O ₄上的电化学吸附率为97％Cs ⁺，最大吸附容量为16.13 mg / g，Cs ⁺离子的分布系数（K _D）高达3938。此外，PB @ Fe ₃ O ₄微粒的电化学吸附行为与Freundlich吸附等温线和伪二级动力学模型吻合得很好。期望使用PB @ Fe ₃ O ₄的ESIX技术在实际过程中，可将微颗粒用于从铯污染溶液中分离和回收稀Cs ⁺离子。