Spray- and spin-assisted layer-by-layer assembly of copper nanoparticles on thin-film composite reverse osmosis membrane for biofouling mitigation
| Autor: | Wen Ma, Tran Van Anh Luong, Md. Saifur Rahaman, Adel Soroush, Gregory Brennan, Nathalie Tufenkji, Bahareh Asadishad |
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| Rok vydání: | 2015 |
| Předmět: |
Osmosis
Environmental Engineering Materials science Biofouling Nanoparticle 02 engineering and technology 010501 environmental sciences 01 natural sciences Water Purification Thin-film composite membrane Reverse osmosis Waste Management and Disposal 0105 earth and related environmental sciences Water Science and Technology Civil and Structural Engineering Chromatography Ecological Modeling Layer by layer Membranes Artificial Permeation 021001 nanoscience & nanotechnology Pollution Membrane Chemical engineering Polyamide Nanoparticles 0210 nano-technology Copper |
| Zdroj: | Water research. 99 |
| ISSN: | 1879-2448 |
| Popis: | Copper nanoparticles (CuNPs) have long been considered as highly effective biocides; however, the lack of suitable methods for loading CuNPs onto polymeric membranes is recognized as being one of the primary reasons for the limited research concerning their application in membrane industries. A highly efficient spray- and spin-assisted layer-by-layer (SSLbL) method was developed to functionalize the TFC polyamide RO membranes with controllable loading of CuNPs for biofouling control. The SSLbL method was able to produce a uniform bilayer of polyethyleneimine-coated CuNPs and poly(acrylic) acid in less than 1 min, which is far more efficient than the traditional dipping approach (25–60 min). The successful loading of CuNPs onto the membrane surface was confirmed by XPS analysis. Increasing the number of bilayers from 2 to 10 led to an increased quantity of CuNPs on the membrane surface, from 1.75 to 23.7 μg cm−2. Multi-layer coating exhibited minor impact on the membrane water permeation flux (13.3% reduction) while retaining the original salt rejection ability. Both static bacterial inactivation and cross-flow filtration tests demonstrated that CuNPs could significantly improve anti-biofouling property of a polyamide membrane and effectively inhibit the permeate flux reduction caused by bacterial deposition on the membrane surface. Once depleted, CuNPs can also be potentially regenerated on the membrane surface via the same SSLbL method. |
| Databáze: | OpenAIRE |
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