Journal of Solution Chemistry

Electronic Supplementary Material

Extraction of Metal Ions from Aqueous Solutions Using Imidazolium Based Ionic Liquids

Urszula Domańska,* and Anna Rękawek

Physical Chemistry Division, Faculty of Chemistry, WarsawUniversity of Technology, Noakowskiego 3, 00-664 Warsaw, Poland.

Fig. 1S.Solvent effect on the extraction of Ag+ at pH = 1.5 andT = 296 K , sample 0.5 mL with chloroform, and ILs: [EEIM][NTf2], or [BEIM][NTf2], or [HEIM][NTf2], or [BEIM][PF6], or [BMIM][PF6], or [HEIM][PF6], .

Fig. 2S.The effect of pHon the extraction efficiencies of Ag+, at T = 296 K, sample 1 mL: -extraction by CHCl3; – extraction by [BMIM][PF6].

Table 1S. Solvent Effect on the Extraction of Pb2+ at pH = 7.0 -7.5 andT = 296 K, Sample 0.5 mL: Chloroform (CH3Cl) and Ionic Liquids {[EEIM][NTf2], or[BEIM][NTf2], or [HEIM][NTf2], or [BEIM][PF6], or [BMIM][PF6], or [HEIM][PF6]}. - Concentration of the Silver Ion in the Aqueous PhaseBefore the Extraction; - Concentration of the Silver Ion in the Aqueous Phase After the Extraction; Co - Concentration of the Lead Ion in the Organic Phase

Solvent / /ppm / /ppm) / Co /ppm / %E
CHCl3 / 26.544 / 16.50 / 10.045 / 37.8
[EEIM][NTf2] / 26.545 / 5.051 / 21.494 / 81.0
[BEIM][NTf2] / 26.545 / 6.101 / 20.444 / 77.0
[HEIM][NTf2] / 26.544 / 10.11 / 16.432 / 61.9
[BEIM][PF6] / 26.544 / 10.67 / 15.874 / 59.8
[BMIM][PF6] / 26.544 / 6.172 / 20.373 / 76.7
[HEIM][PF6] / 26.545 / 7.271 / 19.274 / 72.6

Table 2S. Volume Effect on the Extraction of Pb2+ at pH = 7.0-7.5 andT = 296 K with Chloroform (CHCl3): - Concentration of the Silver Ion in the Aqueous PhaseBefore the Extraction; - Concentration of the Silver Ion in the Aqueous Phase After the Extraction; Co - Concentration of the Lead Ion in the Organic Phase

VCHCl3/mL / /ppm / /ppm) / Co /ppm / %E
0.5 / 27.035 / 16.990 / 10.045 / 37.8
1.0 / 26.544 / 13.208 / 13.336 / 50.2
2.0 / 26.545 / 11.393 / 15.152 / 57.1

Table 3S.Volume Effect on the Extraction of Pb2+ at pH = 7.0-7.5 andT = 296 K with [BMIM][PF6]: - Concentration of the Silver Ion in the Aqueous PhaseBefore the Extraction; - Concentration of the Silver Ion in the Aqueous Phase After the Extraction; Co - Concentration of the Lead Ion in the Organic Phase

V[BMIM][PF6]/mL / /ppm / /ppm) / Co /ppm / %E
0.3 / 26.544 / 3.759 / 22.785 / 85.8
0.5 / 26.544 / 6.195 / 20.349 / 76.7
1.0 / 26.544 / 7.039 / 19.505 / 73.5

Table 4S.Solvent Effect on the Re-extraction of Pb2+ at pH = 1.0 andT = 296 K from Chloroform and from ILs: [EEIM][NTf2], or [BEIM][NTf2], or [HEIM][NTf2], or [BEIM][PF6], or [BMIM][PF6], or [HEIM][PF6]:(Cre)w- Concentration of the Lead Ion in the Aqueous Phase After Re-extraction; Co - Concentration of the Lead Ion in the Organic Phase Before Re-extraction

Solvent / (Cre)w /ppm / Co/ppm / %S
CHCl3 / 10.007 / 10.045 / 99.6
[EEIM][NTf2] / 16.320 / 21.494 / 75.9
[BEIM][NTf2] / 16.399 / 20.444 / 80.2
[HEIM][NTf2] / 12.833 / 16.432 / 78.1
[BEIM][PF6] / 15.838 / 15.874 / 99.8
[BMIM][PF6] / 18.277 / 20.373 / 89.7
[HEIM][PF6] / 15.681 / 19.274 / 81.4

Table 5S.Volume Effect on the Extraction of Pb2+ with 1 mol∙dm-3 HCl at pH = 1.0 andT = 296 K from Chloroform: (Cre)w - Concentration of the Lead Ion in the Aqueous Phase After Re-extraction; Co - Concentration of the Lead Ion in the Organic Phase Before Re-extraction

VCHCl3/mL / (Cre)w /ppm / Co/ppm / %S
0.5 / 10.007 / 10.045 / 99.6
2.0 / 12.610 / 15.152 / 83.2

Table 6S.Volume Effect on the Re-extraction of Pb2+ with 1 mol∙dm-3 HCl at pH = 1.0 andT = 296 K from [BMIM][PF6]: (Cre)w - Concentration of the Lead Ion in the Aqueous Phase After Re-extraction; Co - Concentration of the Lead Ion in the Organic Phase Before Re-extraction

V[BMIM][PF6]/mL / (Cre)w /ppm / Co/ppm / %S
0.3 / 17.274 / 22.785 / 88.6
0.5 / 20.373 / 20.373 / 100.0
1.0 / 19.443 / 19.505 / 99.7

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