Using batch and column procedures, the present work investigated the sorption behaviour of 137Cs and 152+154Eu by bentonite phosphate modified with nickel (BPN) sorbent. The kinetic data obey pseudo-1st-order for 137Cs and follow pseudo-2nd-order for 152+154Eu. Various sorption isotherm models were used to analyze equilibrium data. The thermodynamic functions reflect an endothermic and spontaneous sorption process. HCl (about 95.35 %) and CaCl2 (about 98.13 %) showed the optimum eluents for the complete recovery of both 137Cs and 152+154Eu, respectively. Finally, column data show that 137Cs and 152+154Eu may be loaded on BNP sorbent and separated from an aqueous solution using a variety of HCl concentrations as eluent. The obtianed results revealed that BNP sorbent is suitable for recovering 137Cs and 152+154Eu from low-level radioactive waste effluents (LLW).

中文翻译：

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137Cs 和 152+154Eu 在镍改性膨润土磷酸盐上的吸附行为：动力学、等温线和色谱柱应用

使用批处理和柱程序，目前的工作研究了137铯和152+154Eu 由用镍 (BPN) 吸附剂改性的膨润土磷酸盐制成。动力学数据服从伪1英石-订购137Cs并跟随伪2ND-订购152+154欧洲联盟。使用各种吸附等温模型来分析平衡数据。热力学函数反映了吸热和自发吸附过程。HCl（约95.35%）和CaCl2（约 98.13%）显示了完全回收两种物质的最佳洗脱液137铯和152+154分别是欧盟。最后，柱状数据表明137铯和152+154Eu 可以负载在 BNP 吸附剂上，并使用各种 HCl 浓度作为洗脱剂从水溶液中分离。所得结果表明BNP吸附剂适合回收137铯和152+154来自低放射性废物流出物 (LLW) 的 EU。