Changes in physicochemical and transport properties of a reverse osmosis membrane exposed to chloraminated seawater
This study contributed to improving our understanding of how disinfectants, applied to control biofouling of reverse osmosis (RO) membranes, result in membrane performance degradation. We investigated changes in physicochemical properties and permeation performance of a RO membrane with fully aromat...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
American Chemical Society
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/49972 |
| _version_ | 1848758363231354880 |
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| author | Valentino, L. Renkens, T. Maugin, T. Croué, Jean-Philippe Mariñas, B. |
| author_facet | Valentino, L. Renkens, T. Maugin, T. Croué, Jean-Philippe Mariñas, B. |
| author_sort | Valentino, L. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | This study contributed to improving our understanding of how disinfectants, applied to control biofouling of reverse osmosis (RO) membranes, result in membrane performance degradation. We investigated changes in physicochemical properties and permeation performance of a RO membrane with fully aromatic polyamide (PA) active layer. Membrane samples were exposed to varying concentrations of monochloramine, bromide, and iodide in both synthetic and natural seawater. Elemental analysis of the membrane active layer by Rutherford backscattering spectrometry (RBS) revealed the incorporation of bromine and iodine into the polyamide. The kinetics of polyamide bromination were first order with respect to the concentration of the secondary oxidizing agent Br2 for the conditions investigated. Halogenated membranes were characterized after treatment with a reducing agent and heavy ion probes to reveal the occurrence of irreversible ring halogenation and an increase in carboxylic groups, the latter produced as a result of amide bond cleavage. Finally, permeation experiments revealed increases in both water permeability and salt passage as a result of oxidative damage. |
| first_indexed | 2025-11-14T09:42:48Z |
| format | Journal Article |
| id | curtin-20.500.11937-49972 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:42:48Z |
| publishDate | 2015 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-499722017-09-13T15:40:42Z Changes in physicochemical and transport properties of a reverse osmosis membrane exposed to chloraminated seawater Valentino, L. Renkens, T. Maugin, T. Croué, Jean-Philippe Mariñas, B. This study contributed to improving our understanding of how disinfectants, applied to control biofouling of reverse osmosis (RO) membranes, result in membrane performance degradation. We investigated changes in physicochemical properties and permeation performance of a RO membrane with fully aromatic polyamide (PA) active layer. Membrane samples were exposed to varying concentrations of monochloramine, bromide, and iodide in both synthetic and natural seawater. Elemental analysis of the membrane active layer by Rutherford backscattering spectrometry (RBS) revealed the incorporation of bromine and iodine into the polyamide. The kinetics of polyamide bromination were first order with respect to the concentration of the secondary oxidizing agent Br2 for the conditions investigated. Halogenated membranes were characterized after treatment with a reducing agent and heavy ion probes to reveal the occurrence of irreversible ring halogenation and an increase in carboxylic groups, the latter produced as a result of amide bond cleavage. Finally, permeation experiments revealed increases in both water permeability and salt passage as a result of oxidative damage. 2015 Journal Article http://hdl.handle.net/20.500.11937/49972 10.1021/es504495j American Chemical Society restricted |
| spellingShingle | Valentino, L. Renkens, T. Maugin, T. Croué, Jean-Philippe Mariñas, B. Changes in physicochemical and transport properties of a reverse osmosis membrane exposed to chloraminated seawater |
| title | Changes in physicochemical and transport properties of a reverse osmosis membrane exposed to chloraminated seawater |
| title_full | Changes in physicochemical and transport properties of a reverse osmosis membrane exposed to chloraminated seawater |
| title_fullStr | Changes in physicochemical and transport properties of a reverse osmosis membrane exposed to chloraminated seawater |
| title_full_unstemmed | Changes in physicochemical and transport properties of a reverse osmosis membrane exposed to chloraminated seawater |
| title_short | Changes in physicochemical and transport properties of a reverse osmosis membrane exposed to chloraminated seawater |
| title_sort | changes in physicochemical and transport properties of a reverse osmosis membrane exposed to chloraminated seawater |
| url | http://hdl.handle.net/20.500.11937/49972 |