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Efficient and Selective Extraction of 99mTcO4– from Aqueous Media Using Hydrophobic Deep Eutectic Solvents
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-10-15 00:00:00 , DOI: 10.1021/acssuschemeng.8b03950 Tim E. Phelps 1 , Nakara Bhawawet 1 , Silvia S. Jurisson 1 , Gary A. Baker 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-10-15 00:00:00 , DOI: 10.1021/acssuschemeng.8b03950 Tim E. Phelps 1 , Nakara Bhawawet 1 , Silvia S. Jurisson 1 , Gary A. Baker 1
Affiliation
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Extraction of trace pertechnetate (99mTcO4–) from aqueous media using hydrophobic deep eutectic solvents (DESs) is reported for the first time. The hydrophobic DESs studied comprise a 1:2 molar ratio of a tetraalkylammonium or tetraalkylphosphonium halide mixed with a monocarboxylic acid (i.e., saturated fatty acid). Quantitative (>99%) removal of tracer levels of 99mTcO4– from an aqueous phase in the presence of a large excess of competing anions (e.g., Cl–, NO3–, HCO3–, H2PO4–, SO42–) within 5–60 min at 25 °C without the aid of a formal extracting agent (e.g., ionophore) demonstrates an efficient and selective extraction. At infinite dilution of pertechnetate, very high distribution ratios in excess of 103 are observed. Attempts to strip technetium from the DES extractant phase by reduction with SnCl2 are also reported. Overall, these outcomes provide the basis for considering hydrophobic DESs as an alternative platform for 99TcO4– waste management.
中文翻译：
高效的萃取分离99米TCO 4 -从含水介质中使用疏水深共晶溶剂
首次报道了使用疏水性深共熔溶剂（DES）从水性介质中萃取痕量高tech酸（99m TcO 4 –）。所研究的疏水性DES包含摩尔比为1：2的四烷基铵或四烷基phosph卤化物与一元羧酸（即饱和脂肪酸）混合。定量的（> 99％）的去除的示踪剂水平99米TCO 4 -从在大量过量的竞争性阴离子（的存在的水相例如Cl -，NO 3 -，HCO 3 -，H 2 PO 4 - SO，4 2–）在25°C下5–60分钟内，无需借助正式的萃取剂（例如，离子载体）即可证明是一种高效且选择性的萃取方法。在高dilution酸盐的无限稀释下，观察到非常高的分配比，超过10 3。还报道了通过用SnCl 2还原从DES萃取剂相中脱除tech的尝试。总体而言，这些结果提供了考虑疏水DESS作为一种替代的基础平台99 TCO 4 -废物管理。
更新日期：2018-10-15
中文翻译：
高效的萃取分离99米TCO 4 -从含水介质中使用疏水深共晶溶剂
首次报道了使用疏水性深共熔溶剂（DES）从水性介质中萃取痕量高tech酸（99m TcO 4 –）。所研究的疏水性DES包含摩尔比为1：2的四烷基铵或四烷基phosph卤化物与一元羧酸（即饱和脂肪酸）混合。定量的（> 99％）的去除的示踪剂水平99米TCO 4 -从在大量过量的竞争性阴离子（的存在的水相例如Cl -，NO 3 -，HCO 3 -，H 2 PO 4 - SO，4 2–）在25°C下5–60分钟内，无需借助正式的萃取剂（例如，离子载体）即可证明是一种高效且选择性的萃取方法。在高dilution酸盐的无限稀释下，观察到非常高的分配比，超过10 3。还报道了通过用SnCl 2还原从DES萃取剂相中脱除tech的尝试。总体而言，这些结果提供了考虑疏水DESS作为一种替代的基础平台99 TCO 4 -废物管理。
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