Efficient removal of radioactive cesium from complex wastewater is a challenge. Unlike traditional precipitation and hydrothermal synthesis, a novel vast specific surface area adsorbent of copper hexacyanoferrates named EA-CuHCF was synthesized using a one-pot solvothermal method under the moderate ethanol media characterized by XRD, SEM, EDS, BET, and FTIR. It was found that the maximum adsorption capacity towards Cs⁺ was 452.5 mg/g, which is far higher than most of the reported Prussian blue analogues so far. Moreover, EA-CuHCF could effectively adsorb Cs⁺ at a wide pH range and low concentration of Cs⁺ in geothermal water within 30 minutes, and the removal rate of Cs⁺ was 92.1%. Finally, the separation factors between Cs⁺ and other competitive ions were higher than 553, and the distribution coefficient of Cs⁺ reached up to 2.343 × 10⁴ mL/g. These properties suggest that EA-CuHCF synthesized by the solvothermal method has high capacity and selectivity and can be used as a candidate for Cs⁺ removal from wastewater.

中文翻译：

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用于从废水中去除 Cs+ 的高性能六氰基高铁酸铜的新型一锅溶剂热合成

从复杂的废水中有效去除放射性铯是一项挑战。与传统的沉淀和水热合成不同，一种名为 EA-CuHCF 的新型六氰基铁酸铜大比表面积吸附剂在中等乙醇介质下使用一锅溶剂热法合成，并通过 XRD、SEM、EDS、BET 和 FTIR 表征。发现对Cs ⁺的最大吸附容量为452.5 mg/g，远高于迄今为止报道的大多数普鲁士蓝类似物。此外，EA-的CuHCF能有效吸附铯⁺在宽pH范围和Cs的低浓度⁺在地热水在30分钟内，和Cs的去除率⁺ 92.1％。最后，Cs之间的分离因子⁺等竞争性离子均高于553，Cs ⁺的分配系数高达2.343×10 ⁴  mL/g。这些特性表明，通过溶剂热法合成的 EA-CuHCF 具有高容量和选择性，可用作从废水中去除Cs ⁺的候选物。