https://orcid.org/0000-0001-8065-8643
Figures & data
Figure 1. (a): Structure of N, N′-dimethyl-N, N′-dioctyl-diglycolamide (DMDODGA = L). (b): Structure of [Bmim][PF6].
![Figure 1. (a): Structure of N, N′-dimethyl-N, N′-dioctyl-diglycolamide (DMDODGA = L). (b): Structure of [Bmim][PF6].](/cms/asset/c5b0cad5-f72e-4b55-8ca0-52c910b3fddd/tnst_a_1604270_f0001_b.gif)
Figure 2. Dependence of the extraction of Ce(III) on the acid concentration in aqueous solution. Black circles: L-[Bmim][PF6] system, black squares: L-40% octanol/kerosene system, black triangle: pure [Bmim][PF6] system. ([L]ILs = 0.024 M, [L]o = 0.112 M, [Ce(III)]aq = 3.4 × 10–3 M).
![Figure 2. Dependence of the extraction of Ce(III) on the acid concentration in aqueous solution. Black circles: L-[Bmim][PF6] system, black squares: L-40% octanol/kerosene system, black triangle: pure [Bmim][PF6] system. ([L]ILs = 0.024 M, [L]o = 0.112 M, [Ce(III)]aq = 3.4 × 10–3 M).](/cms/asset/6f0fb953-a456-4545-850b-3752ad89cf36/tnst_a_1604270_f0002_b.gif)
Figure 3. Effect of the initial concentrations of [Bmim]Cl and NaCl on the extraction of Ce(III) by L-[Bmim][PF6] system. ([L]ILs = 0.030 M, [Ce(III)]aq = 3.4 × 10–3 M, [HNO3] = 1 M).
![Figure 3. Effect of the initial concentrations of [Bmim]Cl and NaCl on the extraction of Ce(III) by L-[Bmim][PF6] system. ([L]ILs = 0.030 M, [Ce(III)]aq = 3.4 × 10–3 M, [HNO3] = 1 M).](/cms/asset/f3e63a0e-6a00-4f14-b66e-eff9114155d6/tnst_a_1604270_f0003_b.gif)
Figure 4. Effect of the H+ and NO3− concentration on the extraction of Ce(III) by L-40% octanol/kerosene system. (black circles: [H+]ini = 2 M, black squares: [NO3−]ini = 2 M, [L]o = 0.0715 M, [Ce(III)]aq = 3.4 × 10–3 M).
![Figure 4. Effect of the H+ and NO3− concentration on the extraction of Ce(III) by L-40% octanol/kerosene system. (black circles: [H+]ini = 2 M, black squares: [NO3−]ini = 2 M, [L]o = 0.0715 M, [Ce(III)]aq = 3.4 × 10–3 M).](/cms/asset/23a96639-a8d9-4d9b-a106-31e7731d5d39/tnst_a_1604270_f0004_b.gif)
Figure 5. Slope analysis of Ce(III) extraction as a function of the concentration of L-[Bmim][PF6] system and L-40% octanol/kerosene system. ([Ce(III)]aq = 3.4 × 10–3 M, [HNO3] = 1 M).
![Figure 5. Slope analysis of Ce(III) extraction as a function of the concentration of L-[Bmim][PF6] system and L-40% octanol/kerosene system. ([Ce(III)]aq = 3.4 × 10–3 M, [HNO3] = 1 M).](/cms/asset/f6fd6d58-f5cf-4ce6-952c-497bd3fc2355/tnst_a_1604270_f0005_b.gif)
Figure 6. Ce(III) loading capacity of L-[Bmim][PF6] and L-40% octanol/kerosene system. (L-[Bmim][PF6] system: [L]ILs = 0.026 M, [Ce(III)]aq = 3.5 × 10–3 M, [HNO3] = 0.1 M; L-40% octanol/kerosene system: [L]o = 0.106 M, [Ce(III)]aq = 3.4 × 10–3 M, [HNO3] = 1 M).
![Figure 6. Ce(III) loading capacity of L-[Bmim][PF6] and L-40% octanol/kerosene system. (L-[Bmim][PF6] system: [L]ILs = 0.026 M, [Ce(III)]aq = 3.5 × 10–3 M, [HNO3] = 0.1 M; L-40% octanol/kerosene system: [L]o = 0.106 M, [Ce(III)]aq = 3.4 × 10–3 M, [HNO3] = 1 M).](/cms/asset/f9f9f95c-a41d-45f9-9a08-e3ac008e8953/tnst_a_1604270_f0006_b.gif)
Figure 7. IR spectra of different systems. (a) L; (b) Ce(III)-L in 40% octanol/kerosene system; (c) [Bmim][PF6]; (d) L-[Bmim][PF6]; and (e) Ce(III)-L-[Bmim][PF6]. ([L]ILs = 0.024 M, [Ce(III)]aq = 3.4 × 10–3 M, [HNO3] = 1 M).
![Figure 7. IR spectra of different systems. (a) L; (b) Ce(III)-L in 40% octanol/kerosene system; (c) [Bmim][PF6]; (d) L-[Bmim][PF6]; and (e) Ce(III)-L-[Bmim][PF6]. ([L]ILs = 0.024 M, [Ce(III)]aq = 3.4 × 10–3 M, [HNO3] = 1 M).](/cms/asset/0d0ea491-ffa2-4d6a-b2aa-fdd067e79fea/tnst_a_1604270_f0007_b.gif)
Figure 8. The proposed extraction process of L-[Bmim][PF6] system with Ce(III) at low nitric acid concentration.
![Figure 8. The proposed extraction process of L-[Bmim][PF6] system with Ce(III) at low nitric acid concentration.](/cms/asset/8faace66-55e3-409e-85bb-40629974de28/tnst_a_1604270_f0008_b.gif)
