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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemical engineering
Advanced desalination of dye/NaCl mixures by a loose nanofiltration membrane for digital ink-jet printing
Separation and Purification Technology, Volume 197, Year 2018
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Description
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.
Authors & Co-Authors
Lin, Jiuyang
China, Fuzhou
Fuzhou University
Sotto, A.
Spain, Madrid
Universidad Rey Juan Carlos
Luis, Patricia
Belgium, Louvain-la-neuve
Université Catholique de Louvain
Liu, Minghua
China, Fuzhou
Fuzhou University
van der Bruggen, Bart
Belgium, Leuven
Ku Leuven
Statistics
Citations: 132
Authors: 5
Affiliations: 9
Identifiers
Doi:
10.1016/j.seppur.2017.12.045
ISSN:
13835866