Development of N, N, N’, N’-tetra-2-ethylhexyl-thiodiglycolamide silica-based adsorbent to separate useful metals from simulated high-level liquid waste
Development of N, N, N’, N’-tetra-2-ethylhexyl-thiodiglycolamide silica-based adsorbent to separate useful metals from simulated high-level liquid waste
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开发 N,N,N’,N’-四-2-乙基己基硫代二甘醇酰胺二氧化硅基吸附剂，用于从模拟高放废液中分离有用金属
DOI：
10.1016/j.chroma.2022.463353
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发表时间：
2022
影响因子：
4.1
通讯作者：
Seong-Yun Kim
中科院分区：
文献类型：
--
作者：
Naoki Osawa;Masahiko Kubota;Hao Wu;Seong-Yun Kim
通过用 N,N,N',N'-四-2-乙基己基硫代二甘醇酰胺 (TEHTDGA) 和三正辛胺 (TOA) 的混合物浸渍大孔二氧化硅聚合物复合材料 (SiO2-P) 颗粒，合成了一种新型二氧化硅基吸附剂。然后，根据间歇吸附实验获得的各种吸附特性，如 HNO3 浓度、接触时间、反应温度、吸附等温线和吸附剂的化学稳定性，评估了使用新合成的吸附剂 (TEHTDGA + TOA)/SiO2-P 从模拟高放废液 (HLLW) 中分离 Pd(II) 和其他金属离子的可能性。此外，根据间歇吸附实验获得的特性进行了柱分离实验，并检验了同时分离多种金属离子的可能性。实验结果表明，(TEHTDGA + TOA)/SiO2-P 在从模拟 HLLW 中分离多种金属离子方面表现良好。
A novel silica-based adsorbent was synthesized by impregnating macroporous silica polymer composite (SiO2-P) particles with a mixture ofN,N,N′,N′-tetra-2-ethylhexyl-thiodiglycolamide (TEHTDGA) and tri-n-octylamine (TOA). Then, the possibility of separating Pd(II) and other metal ions from simulated high-level liquid waste (HLLW) using the newly synthesized adsorbent (TEHTDGA + TOA)/SiO2-P was evaluated based on various adsorption characteristics obtained via batch-adsorption experiments, such as the HNO3concentration, contact time, reaction temperature, adsorption isotherm, and chemical stability of the adsorbent. Furthermore, column separation experiments were performed based on the characteristics obtained from the batch-adsorption experiment, and the possibility of simultaneous separation of multiple metal ions was examined. The experimental results revealed that (TEHTDGA + TOA)/SiO2-P performs well in the separation of multiple metal ions from simulated HLLW.