亚铁氰化铜的制备及其对铯的吸附

以亚铁氰化钠和硝酸铜为原料,采用水热合成法制备出亚铁氰化铜(CuFC)吸附剂,对其进行了表征,并考察了CuFC对模拟放射性废水中铯的吸附性能。表征结果显示:产物的分子式为Cu2Fe(CN)6·7H2O,外观为具有清晰几何形状的颗粒物,粒径约为30 nm。25℃下的静态吸附实验结果表明:当初始铯质量浓度为98.01μg/L、CuFC加入量为0.08 g/L、吸附时间为90 min时,达到吸附平衡,铯的去污系数达到1.13×104;用拟二级动力学模型可准确描述CuFC对铯的吸附过程,相关系数为1.000 0;吸附等温线符合Freundlich等温吸附模型。

Preparation of Cupric Ferrocyanide and Adsorption of Cesium

Cupric ferrocyanide（CuFC）was prepared as adsorbent by hydrothermal synthesis method using sodium ferrocyanide and cupric nitrate as raw material. The product was characterized and the adsorption properties of CuFC to cesium in the simulated radioactive wastewater were studied. The characteristic results show that the molecular formula of the product is Cu₂Fe（CN）₆·7H₂O,and the CuFC particles have clear geometric shapes with a single particle size of approximately 30 nm. The experimental results of static adsorption under 25 ℃ show that： the cesium decontamination factor is 1.13×10⁴ when the initial cesium mass concentration is 98.01 μg/L,the CuFC dose is 0.08 g/L and the adsorption time is 90 min;The adsorption process of cesium on CuFC can be best described by a pseudo-second order kinetic model with 1.000 of the correlation coefficient;The adsorption isotherm fits to Freundlich isothermal adsorption model.