In this study, a novel cesium scavenger, magnetic copper hexacyanoferrate (III)/pomelo peel biochar (CuHCF-MPC), is prepared. CuHCF-MPC exhibits remarkable Cs⁺ adsorption properties including rapid kinetics, stability over a wide pH range (pH ≈3–10), high cesium adsorption capacity (145.65 mg g⁻¹ at pH 7), high removal efficiency (>90%) and high K_d value (49 000 mL g⁻¹) even in the presence of competitive cations (K⁺, Na⁺, Mg²⁺, and Ca²⁺) at high concentration. The kinetic behavior of cesium adsorption onto CuHCF-MPC can be elucidated with the pseudo-second-order kinetic model. The adsorption is classified as an endothermic and spontaneous process as proved by ΔH < 0, ΔG < 0. The positive results suggest CuHCF-MPC is an economic, environment-friendly, and promising task-specific adsorbent of cesium.

中文翻译：

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使用磁性六氰合铁酸铜/生物炭/Fe3O4分离铯

本研究制备了一种新型的铯清除剂磁性六氰基铁酸铜（III）/柚皮生物炭（CuHCF-MPC）。CuHCF-MPC 表现出显着的 Cs ⁺吸附特性，包括快速动力学、在宽 pH 范围内的稳定性（pH ≈3–10）、高铯吸附容量（在 pH 7 时为 145.65 mg g ^-1）、高去除效率（>90%）^即使存在竞争性阳离子（K ₊ 、^Na + ^、 Mg 2+和^{Ca 2+}) 高浓度。铯吸附在CuHCF-MPC上的动力学行为可以用准二级动力学模型来阐明。吸附被归类为吸热和自发过程，Δ H < 0，Δ G < 0 证明。积极的结果表明，CuHCF-MPC 是一种经济、环保且有前途的铯吸附剂。