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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemical engineering
High performance loose nanofiltration membranes obtained by a catechol-based route for efficient dye/salt separation
Chemical Engineering Journal, Volume 375, Article 121982, Year 2019
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Description
Loose nanofiltration membranes with excellent dye rejection and high inorganic salt transmission are promising for dye/salt separation. Herein, a mussel-inspired organic solvent-free method was chosen to prepare loose nanofiltration membranes with tunable surface structures and properties. A low-cost material, 1,2-dihydroxybenzene (catechol), was used to replace dopamine for the mussel-inspired surface coating strategy. With the assistance of CuSO4/H2O2, a catechol/PEI coating layer was formed on the polyethersulfone (PES) substrate in only 10 min. Through constructing the coating layer based on polyethylenimine (PEI) with different molecular weights, catechol/PEI ratios and solution deposition times, different membranes were obtained. The separation performance of the membrane is tested by a lab-scale crossflow setup under the pressure of 4 bar. Especially, LNM-3 have an ultrahigh water permeability (24.5 LMH bar−1) and an extremely low rejection for both NaCl and Na2SO4 in the concentrations between 1.0 and 50.0 g L−1. Meanwhile, LNM-3 shows superior rejection for different types of dyes, demonstrating their great potential in practical applications. Overall, such an approach enabled by an organic solvent-free process and low-cost chemicals may offer a new strategy for the environmental-friendly and economical manufacturing of multifunctional loose nanofiltration membrane. © 2019 Elsevier B.V.
Authors & Co-Authors
Wang, Jing
China, Zhengzhou
First Affiliated Hospital of Zhengzhou University
China, Zhengzhou
Zhengzhou University
Zhu, Junyong
Belgium, Leuven
Ku Leuven
Liu, Jindun
China, Zhengzhou
Zhengzhou University
Zhang, Yatao
China, Zhengzhou
Zhengzhou University
van der Bruggen, Bart
Belgium, Leuven
Ku Leuven
Statistics
Citations: 108
Authors: 5
Affiliations: 4
Identifiers
Doi:
10.1016/j.cej.2019.121982
ISSN:
13858947
Research Areas
Environmental