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- W2781271522 abstract "Abstract 4’4’(5’)-di( tert -butylcyclohexano)-18-crown-6 (DtBuCH18C6) modified with 1-ethyl-3-methylimidazolium bis (trifluoro methylsulfonyl) imide ([C 2 mim][NTf 2 ]) was loaded onto porous silica/polymer composite support (SiO 2 -P) particles with a mean diameter of 50 μm and used to extract Sr(II) from HNO 3 solutions. The effect of HNO 3 concentration on the equilibrium kinetics and thermodynamic properties of Sr(II) uptake were investigated by batch methods. The adsorbent exhibited excellent adsorption selectively for Sr(II) over a wide range of HNO 3 concentrations. The adsorption of Sr(II) in the presence of 3 M HNO 3 on (DtBuCH18C6+[C 2 mim][NTf 2 ])/SiO 2 -P attained equilibrium within 1 h, and a relatively large distribution coefficient ( K d ) of ca. 30 cm 3 ·g −1 was obtained. Kinetic data were successfully modeled using pseudo-second-order kinetics. The adsorption of Sr(II) was a spontaneous and exothermic process. The uptake isotherm of Sr(II) for (DtBuCH18C6+[C 2 mim][NTf 2 ])/SiO 2 -P followed a Langmuir-type adsorption equation." @default.
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- W2781271522 date "2017-12-01" @default.
- W2781271522 modified "2023-09-24" @default.
- W2781271522 title "Adsorption Behavior of Sr(II) from High-level Liquid Waste using Crown Ether with Ionic Liquid Impregnated Silica Adsorbent" @default.
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- W2781271522 doi "https://doi.org/10.1016/j.egypro.2017.09.426" @default.
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