Figure 4: Decrease of the normalized permeate flux with increased recovery rate for three hydrophobic ionic liquids in a dead-end stirred cell (25°C, 35 bar). Wastewater samples containing IM16 (CF3SO2)2N and Pyr14 (CF3SO2)2N were filtered using the Desal DK membrane, while the wastewater sample containing Pyr16 (CF3SO2)2N was filtered using the NF-270 membrane.