Solid phase extraction based on the phase transition of poly(N-isopropylacrylamide): the extraction behaviour of lanthanide(iii) ions in highly acidic solutions†,Reaction Chemistry & Engineering

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Solid phase extraction based on the phase transition of poly(N-isopropylacrylamide): the extraction behaviour of lanthanide(iii) ions in highly acidic solutions†
Reaction Chemistry & Engineering ( IF 3.4 ) Pub Date : 2017-12-13 00:00:00 , DOI: 10.1039/c7re00060j
Ki Chul Park _{1,

2,

3,

4} , Haruka Tateno _{1,

2,

3,

4} , Takehiko Tsukahara _{1,

2,

3,

4}

Affiliation

The present study investigates the applicability of poly(N-isopropylacrylamide) (PNIPAAm) as an extraction medium for trivalent lanthanide (Ln(III)) ions in high concentrations of nitric acid solutions by using octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO) as an extracting agent. The extraction is based on the hydrophobic, co-aggregative binding of the Ln-CMPO nitrate complex formed in situ onto the PNIPAAm aggregates growing above the phase-transition temperature. The resulting co-aggregates enabled easy separation of the liquid and solid phases. The extraction of Ln(III) ions was affected by the efficiency and extent of complexation and the stability of the complex. Furthermore, the difference in the stability of Ln-CMPO complex species allowed for the stripping of Ln(III) ions in hydrochloric acid solutions.

中文翻译：

基于聚（N-异丙基丙烯酰胺）相变的固相萃取：镧系元素（iii）在高酸性溶液中的萃取行为†

本研究通过使用辛基（苯基）-N，N-二异丁基氨基甲酰基甲基氧化膦研究聚（N-异丙基丙烯酰胺）（PNIPAAm）作为三价镧系离子（Ln（III））在高浓度硝酸溶液中的萃取介质的适用性（CMPO）作为萃取剂。提取基于在相变温度以上生长的PNIPAAm聚集体上原位形成的Ln-CMPO硝酸盐络合物的疏水性，共聚集结合。所得的共聚集体使得液相和固相易于分离。Ln（III）的提取离子受络合效率和程度以及络合物稳定性的影响。此外，Ln-CMPO络合物物种的稳定性差异允许在盐酸溶液中汽提Ln（III）离子。

更新日期：2017-12-13

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