Abstract In situ electrochemical synthesis method of Zn-Al layered double hydroxides (LDHs) was used to treat the simulated strontium containing liquid radioactive waste (LRW) from nuclear power plants. The removal rate of strontium can reach 98.48±0.20 % (the adsorption capacity is 0.45 mg/g) under the optimal experimental conditions of reaction temperature of 60 °C, reaction time of 240 min, Al electrode current density of 45 mA/cm2, Zn/Al current ratio of 3:1 and initial pH of 10. The composite samples were characterized by XRD, FT-IR and SEM. The results of the characterization and the leaching experiments indicated that Zn-Al LDHs was the major phase in the composite samples, and strontium was removed by substituting the zinc in the crystalline lattice of Zn-Al LDHs or by bonding with hydroxyl on the surface or carbonate in the interlayer of Zn-Al LDHs. In situ electrochemical synthesis method of Zn-Al LDHs has been proved feasible for the removal of strontium in LRW.

中文翻译：

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用于去除锶的锌铝层状双氢氧化物的原位电化学合成

摘要 采用Zn-Al层状双氢氧化物(LDHs)原位电化学合成方法处理核电厂含锶液态放射性废物(LRW)。在反应温度60℃、反应时间240min、Al电极电流密度45mA/cm2的最佳实验条件下，锶的去除率可达98.48±0.20%（吸附量为0.45mg/g）， Zn/Al 电流比为 3:1，初始 pH 值为 10。通过 XRD、FT-IR 和 SEM 对复合样品进行表征。表征和浸出实验的结果表明，Zn-Al LDHs 是复合样品中的主要相，通过取代Zn-Al LDHs晶格中的锌或通过与Zn-Al LDHs表面的羟基或夹层中的碳酸盐键合来去除锶。Zn-Al LDHs的原位电化学合成方法已被证明可用于去除LRW中的锶。