Advanced desalination of dye/NaCl mixtures by a loose nanofiltration membrane for digital ink-jet printing
(2018) Separation and Purification Technology — Vol. 197, n° 1, p. 27-35 (2018)
Files
2018_Ye_Sep_Purif_Technol.pdf
Open Access - Adobe PDF
- 1.46 MB
Details
- Authors
Van der Bruggen, Bart 
- Abstract
- In digital printing, a high salt content in dye solutions is detrimental, which calls for effective strategy for dye/salt fractionation. In this study, a loose nanofiltration (NF) membrane Sepro 2A was employed to desalinate diverse dye species (2 reactive dyes and 4 cationic dyes). This membrane, with a molecular weight cutoff of 490 Da, showed consistently high rejections to all the reactive and cationic dyes (>97.7%). Operational conditions such as dye concentrations and applied pressures have limited effects on the rejection of the membrane. An integrated NF-diafiltration process, involving a pre-concentration and a diafiltration step, was specifically designed for the fractionation of dye/NaCl mixtures. This loose NF membrane showed >99.7% rejection to reactive dyes (reactive blue 2 and reactive orange 16) and ca. 99.3% salt removal with ca. 2.0% dye loss after 5.0 diavolumes. However, the NF membrane experienced a 15.9% loss to methylene blue due to the lower rejection to this model cationic dye (97.2%). The current study provides important insights into dye/salt fractionation by loose NF membranes for digital ink-jet printing. © 2017 Elsevier B.V.
- Affiliations
Citations
Ye, W., Lin, J., Borrego, R., Chen, D., Sotto, A., Luis Alconero, P., Liu, M., Zhao, S., Tang, C. Y., & Van der Bruggen, B. (2018). Advanced desalination of dye/NaCl mixtures by a loose nanofiltration membrane for digital ink-jet printing. Separation and Purification Technology, 197(1), 27-35. https://doi.org/10.1016/j.seppur.2017.12.045 (Original work published 2018)