Table 7 ICP analyses of the water phase of samples prepared starting with 30 mM CuCl2 and 10 mM CuCl2, using toluene and lauric acid solutions in canola oil.

From: Decontamination of water co-polluted by copper, toluene and tetrahydrofuran using lauric acid

Water phase (5 mL)

Oil phase (total volume in brackets)

Cu2+ concentration in water after treatment (mM) [Average % Cu2+ removal]

30 mM CuCl2 + 10 mM NaOH

1:1 toluene: 0.25 M lauric acid in canola oil solution (2 mL)

17.2 ± 0.2 [42.8]

10 mM CuCl2 + 10 mM NaOH

1:1 toluene: 0.25 M lauric acid in canola oil solution (2 mL)

3.9 ± 0.1 [61.1]

30 mM CuCl2 + 10 mM NaOH

1:4 toluene: 0.25 M lauric acid in canola oil solution (5 mL)

13.3 ± 1.1 [55.7]

  1. The volumes used and the lauric acid concentrations are as indicated in the table. Partitioning of copper ions in the toluene phase with lauric acid and a base is also achieved without using canola oil, as qualitatively assessed based on the discoloration of the toluene phase (Fig. S13, supporting information). Measurements were done after 24 h equilibration.
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