Fig. 6: Filtration performance of N-TFN membranes.
From: Microporous organic nanotube assisted design of high performance nanofiltration membranes
a Water permeability and Na2SO4 rejection of N-TFN membranes fabricated with different NT-OEt contents (1000 ppm Na2SO4, 4 bar, pH 7); error bars in the figure represent standard deviation. b Performance comparison between N-TFN membranes and advanced polyamide membranes. c Ion separation performances of the polyamide membranes for feed solutions containing 2000 ppm Na2SO4 and 4000 ppm NaCl. d Rejection of phosphorus by N-TFN membranes (feed solution: 5 ppm phosphorus). e Rejection of boron by N-TFN membranes (feed solution: 5 ppm boron). NaOH was used to adjust the solution pH. f Comparison of boron rejection between the N-TFN membranes and state-of-the-art membranes. Unless otherwise stated, all N-TFN membranes were prepared with a NT-OEt content of 2.6 μg cm−2, and all tests were measured at a pressure of 4 bar and a temperature of 25 °C.
