Selective capture of radionuclides (U, Pu, Th, Am and Co) using functional nanoporous sorbents.
Selective capture of radionuclides (U, Pu, Th, Am and Co) using functional nanoporous sorbents.
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DOI：
10.1016/j.jhazmat.2018.12.043
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发表时间：
2019-03
影响因子：
13.6
通讯作者：
W. Yantasee;G. Fryxell;Kanda Pattamakomsan;Thanapon Sangvanich;R. Wiacek;B. Busche;R. Addleman;C. Tim
中科院分区：
文献类型：
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作者：
W. Yantasee;G. Fryxell;Kanda Pattamakomsan;Thanapon Sangvanich;R. Wiacek;B. Busche;R. Addleman;C. Tim
这项工作评估了由纳米多孔二氧化硅与羟基吡啶酮衍生物（1，2-HOPO，3，2-HOPO，3，4-HOPO），乙酰胺膦酸酯（Ac-Phos），甘氨酸衍生物（IDAA，DE 4A，ED 3A）和硫醇（SH）的单层（SAMMS）自组装而成的用于捕获锕系元素和过渡金属钴的吸附剂材料。在以环境或生理样品中遇到的水平掺杂竞争金属（Cr、Mn、Fe、Co、Cu、Zn、Se、Mo）的过滤海水中，3，4-HOPO-SAMMS在pH 2-8时最好捕获铀（U（VI）），Ac-Phos和1，2-HOPO-SAMMS吸附剂在pH < 2时最好。3，4-HOPO-SAMMS在pH 2-8范围内有效捕获钍（Th（IV））和钚（239 Pu（IV）），在pH 5-8范围内有效捕获镅（241 Am（III））。从掺杂有竞争金属（Cu、As、Ag、Cd、Hg、Tl和Pb）的过滤河水中捕获钴（Co（II））在pH 5-8时最有效，SAMMS上的结合亲和力范围为IDAA > DE 4A> ED 3A> Ac-Phos > SH。亚氨基二乙酸（IDAA）-SAMMS在捕获地下和海水中的Co（II）方面也很出色。在5 min内，3，4-HOPO-SAMMS和IDAA-SAMMS对海水中U（VI）和Co（II）的捕获率分别达到99%以上。这些纳米多孔材料在结合亲和力和吸附速率方面优于市售的阳离子吸附剂。它们在水处理和从复杂基质中回收锕系元素和钴方面具有巨大的潜力。
This work evaluated sorbent materials created from nanoporous silica self-assembled with monolayer (SAMMS) of hydroxypyridinone derivatives (1,2-HOPO, 3,2-HOPO, 3,4-HOPO), acetamide phosphonate (Ac-Phos), glycine derivatives (IDAA, DE4A, ED3A), and thiol (SH) for capturing of actinides and transition metal cobalt. In filtered seawater doped with competing metals (Cr, Mn, Fe, Co, Cu, Zn, Se, Mo) at levels encountered in environmental or physiological samples, 3,4-HOPO-SAMMS was best at capturing uranium (U(VI)) from pH 2–8, Ac-Phos and 1,2-HOPO-SAMMS sorbents were best at pH < 2. 3,4-HOPO-SAMMS effectively captured thorium (Th(IV)) and plutonium (239Pu(IV)) from pH 2–8, and americium (241Am(III)) from pH 5–8. Capturing cobalt (Co(II)) from filtered river water doped with competing metals (Cu, As, Ag, Cd, Hg, Tl, and Pb) was most effective from pH 5–8 with binding affinity ranged from IDAA > DE4A > ED3A > Ac-Phos > SH on SAMMS. Iminodiacetic acid (IDAA)-SAMMS was also outstanding at capturing Co(II) in ground and seawater. Within 5 min, over 99% of U(VI) and Co(II) in seawater was captured by 3,4-HOPO-SAMMS and IDAA-SAMMS, respectively. These nanoporous materials outperformed the commercially available cation sorbents in binding affinity and adsorption rate. They have great potential for water treatment and recovery of actinides and cobalt from complex matrices.