Extraction of valuable metal ions (Cs, Rb, Li, U) from reverse osmosis concentrate using selective sorbents
Extraction of valuable metal ions (Cs, Rb, Li, U) from reverse osmosis concentrate using selective sorbents
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DOI：
10.1016/j.desal.2011.11.042
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发表时间：
2012-02-01
期刊：
影响因子：
9.9
通讯作者：
Luis Cortina, Jose
中科院分区：
文献类型：
--
作者：
Peterskova, Michaela;Valderrama, Cesar;Luis Cortina, Jose
评价了几种吸附剂从反渗透卤水中提取有价金属（Cs、Rb、Li、U）的潜力。实验以批处理方式进行，主要集中在（1）使用单一金属溶液在选定的吸附剂上吸附金属，（2）盐水盐度对Cs吸附程度的影响，和（3）使用双金属溶液吸附Cs和Rb。结果表明，六氰基铁酸盐为基础的萃取剂（CsTreat）是一个更有前途的吸附剂的Cs和Rb比磷酸锆为基础的材料（ZrP），但他们都是成功的吸附锂。关于U（VI），树脂含有膦酸和磺酸基团显示出对这种金属的最高亲和力，而两性树脂含有偕胺肟或氨基膦酸基团表现温和，树脂含有季铵基团被证明是明显无效的U（V）的吸收。结果还表明，Cs的吸收ZrP随着盐水盐度的增加而减少，而盐度似乎几乎没有影响Cs吸附到CsTreat。从双金属系统的吸附结果不同于那些与单金属系统，表明吸附容量是没有太大的影响，任何共离子效应，因此，CsTreat是高度selectivite对Cs和Rb。(C)2011 Elsevier B.V.保留所有权利。
The potential of a number of sorbents at extracting valuable metals (Cs, Rb, Li, U) from reverse osmosis brine was evaluated. The experiments, carried out in batch mode, focused on (1) metal sorption onto selected sorbents using single metal solutions, (2) effect of brine salinity on Cs sorption extent, and (3) sorption of Cs and Rb using bi-metallic solutions. Results showed that the hexacyanoferrate-based extractant (CsTreat) was a more promising sorbent for both Cs and Rb than the zirconium phosphate-based material (ZrP), but that any of them was successful at sorbing Li. With regards to U(VI), the resin containing phosphonic and sulphonic groups displayed the highest affinity towards this metal, while ampholyte resins containing amidoxime or aminophosphonic groups performed modestly and the resin containing quaternary ammonium groups proved to be clearly ineffective for the uptake of U(V). Results also revealed that Cs uptake by ZrP decreased with increasing brine salinity, while salinity appeared to hardly influence the Cs sorption onto CsTreat. The sorption results from bi-metallic systems differed moderately from those with single metal systems, indicating that the sorption capacity was not much influenced by any co-ion effect and, thus, that CsTreat was highly selectivite towards Cs and Rb. (C) 2011 Elsevier B.V. All rights reserved.