Tunable membranes incorporating artificial water channels for high-performance brackish/low-salinity water reverse osmosis desalination
| Autor: | Stefan Chisca, Mihai Deleanu, Alberto Tiraferri, Maria Di Vincenzo, Suzana Pereira Nunes, Didier Cot, Francesco Ricceri, Mihail Barboiu, Valentina-Elena Musteata |
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| Přispěvatelé: | Institut Européen des membranes (IEM), Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM) |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Portable water purification 02 engineering and technology Permeance 010402 general chemistry 01 natural sciences Desalination law.invention biomimetic membranes artificial water channels desalination law [CHIM]Chemical Sciences Reverse osmosis Filtration Multidisciplinary Brackish water 021001 nanoscience & nanotechnology Membrane Separations Science Special Feature 6. Clean water 0104 chemical sciences Membrane Chemical engineering Polyamide 0210 nano-technology |
| Zdroj: | Proc Natl Acad Sci U S A Proceedings of the National Academy of Sciences of the United States of America Proceedings of the National Academy of Sciences of the United States of America, National Academy of Sciences, 2021, 118 (37), pp.e2022200118. ⟨10.1073/pnas.2022200118⟩ |
| ISSN: | 1091-6490 0027-8424 |
| Popis: | International audience; Membrane-based technologies have a tremendous role in water purification and desalination. Inspired by biological proteins, artificial water channels (AWCs) have been proposed to overcome the permeability/selectivity trade-off of desalination processes. Promising strategies exploiting the AWC with angstrom-scale selectivity have revealed their impressive performances when embedded in bilayer membranes. Herein, we demonstrate that self-assembled imidazole-quartet (I-quartet) AWCs are macroscopically incorporated within industrially relevant reverse osmosis membranes. In particular, we explore the best combination between I-quartet AWC and m-phenylenediamine (MPD) monomer to achieve a seamless incorporation of AWC in a defect-free polyamide membrane. The performance of the membranes is evaluated by cross-flow filtration under real reverse osmosis conditions (15 to 20 bar of applied pressure) by filtration of brackish feed streams. The optimized bioinspired membranes achieve an unprecedented improvement, resulting in more than twice (up to 6.9 L⋅m −2 ⋅h −1 ⋅bar −1 ) water permeance of analogous commercial membranes, while maintaining excellent NaCl rejection (>99.5%). They show also excellent performance in the purification of low-salinity water under low-pressure conditions (6 bar of applied pressure) with fluxes up to 35 L⋅m −2 ⋅h −1 and 97.5 to 99.3% observed rejection. |
| Databáze: | OpenAIRE |
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