Impact of the surface energy of particulate foulants on membrane fouling
Foulant-foulant and foulant-membrane interfacial interactions play an important role in dictating the extent of fouling. In order to understand the impact of the surface energy of particulate foulants on the fouling extent, the direct observation through the membrane (DOTM) technique was used to cha...
| Main Authors: | , , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2017
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/85719 http://hdl.handle.net/10220/43808 |
| _version_ | 1826116013566984192 |
|---|---|
| author | Zamani, Farhad Ullah, Asmat Akhondi, Ebrahim Tanudjaja, Henry Jonathan Cornelissen, Emile R. Honciuc, Andrei Fane, Anthony Gordon Chew, Jia Wei |
| author2 | School of Chemical and Biomedical Engineering |
| author_facet | School of Chemical and Biomedical Engineering Zamani, Farhad Ullah, Asmat Akhondi, Ebrahim Tanudjaja, Henry Jonathan Cornelissen, Emile R. Honciuc, Andrei Fane, Anthony Gordon Chew, Jia Wei |
| author_sort | Zamani, Farhad |
| collection | NTU |
| description | Foulant-foulant and foulant-membrane interfacial interactions play an important role in dictating the extent of fouling. In order to understand the impact of the surface energy of particulate foulants on the fouling extent, the direct observation through the membrane (DOTM) technique was used to characterize critical flux and also assess the initial evolution of foulant deposition. Polystyrene and glass with diameters approximating 10 μm were used as foulants because (i) the similar particle diameter eliminated the differences due to particle back-transport, and (ii) the Gibbs free energies (ΔG) of foulant-membrane and foulant-foulant interactions were both negative (i.e., attractive) for polystyrene and both positive (i.e., repulsive) for glass. Results indicate that: (1) because of the attractive and repulsive foulant-membrane interactions of the polystyrene and glass, respectively, (i) critical flux was lower for polystyrene than glass, (ii) the phenomenon of a flowing particle layer was observed at a lower cross-flow velocity (CFV) for glass than polystyrene, and (iii) relaxation was more effective for glass than polystyrene; (2) because of the attractive and repulsive foulant-foulant interactions of the polystyrene and glass, respectively, clustering was observed for the former but not latter; (3) out of the four particle deposition mechanisms (namely, convective, entrapment, dead zone and clustering) distinguished, the first three occurred for both attractive and repulsive interfacial interactions, but the forth (i.e., clustering) only occurred when foulant-foulant interactions were attractive. |
| first_indexed | 2024-10-01T04:04:29Z |
| format | Journal Article |
| id | ntu-10356/85719 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:04:29Z |
| publishDate | 2017 |
| record_format | dspace |
| spelling | ntu-10356/857192020-03-07T11:35:28Z Impact of the surface energy of particulate foulants on membrane fouling Zamani, Farhad Ullah, Asmat Akhondi, Ebrahim Tanudjaja, Henry Jonathan Cornelissen, Emile R. Honciuc, Andrei Fane, Anthony Gordon Chew, Jia Wei School of Chemical and Biomedical Engineering Nanyang Environment and Water Research Institute Singapore Membrane Technology Centre Membrane Fouling Microfiltration Foulant-foulant and foulant-membrane interfacial interactions play an important role in dictating the extent of fouling. In order to understand the impact of the surface energy of particulate foulants on the fouling extent, the direct observation through the membrane (DOTM) technique was used to characterize critical flux and also assess the initial evolution of foulant deposition. Polystyrene and glass with diameters approximating 10 μm were used as foulants because (i) the similar particle diameter eliminated the differences due to particle back-transport, and (ii) the Gibbs free energies (ΔG) of foulant-membrane and foulant-foulant interactions were both negative (i.e., attractive) for polystyrene and both positive (i.e., repulsive) for glass. Results indicate that: (1) because of the attractive and repulsive foulant-membrane interactions of the polystyrene and glass, respectively, (i) critical flux was lower for polystyrene than glass, (ii) the phenomenon of a flowing particle layer was observed at a lower cross-flow velocity (CFV) for glass than polystyrene, and (iii) relaxation was more effective for glass than polystyrene; (2) because of the attractive and repulsive foulant-foulant interactions of the polystyrene and glass, respectively, clustering was observed for the former but not latter; (3) out of the four particle deposition mechanisms (namely, convective, entrapment, dead zone and clustering) distinguished, the first three occurred for both attractive and repulsive interfacial interactions, but the forth (i.e., clustering) only occurred when foulant-foulant interactions were attractive. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) EDB (Economic Devt. Board, S’pore) 2017-09-27T07:40:31Z 2019-12-06T16:09:00Z 2017-09-27T07:40:31Z 2019-12-06T16:09:00Z 2016 Journal Article Zamani, F., Ullah, A., Akhondi, E., Tanudjaja, H. J., Cornelissen, E. R., Honciuc, A., et al. (2016). Impact of the surface energy of particulate foulants on membrane fouling. Journal of Membrane Science, 510, 101-111. 0376-7388 https://hdl.handle.net/10356/85719 http://hdl.handle.net/10220/43808 10.1016/j.memsci.2016.02.064 en Journal of Membrane Science © 2016 Elsevier B.V. |
| spellingShingle | Membrane Fouling Microfiltration Zamani, Farhad Ullah, Asmat Akhondi, Ebrahim Tanudjaja, Henry Jonathan Cornelissen, Emile R. Honciuc, Andrei Fane, Anthony Gordon Chew, Jia Wei Impact of the surface energy of particulate foulants on membrane fouling |
| title | Impact of the surface energy of particulate foulants on membrane fouling |
| title_full | Impact of the surface energy of particulate foulants on membrane fouling |
| title_fullStr | Impact of the surface energy of particulate foulants on membrane fouling |
| title_full_unstemmed | Impact of the surface energy of particulate foulants on membrane fouling |
| title_short | Impact of the surface energy of particulate foulants on membrane fouling |
| title_sort | impact of the surface energy of particulate foulants on membrane fouling |
| topic | Membrane Fouling Microfiltration |
| url | https://hdl.handle.net/10356/85719 http://hdl.handle.net/10220/43808 |
| work_keys_str_mv | AT zamanifarhad impactofthesurfaceenergyofparticulatefoulantsonmembranefouling AT ullahasmat impactofthesurfaceenergyofparticulatefoulantsonmembranefouling AT akhondiebrahim impactofthesurfaceenergyofparticulatefoulantsonmembranefouling AT tanudjajahenryjonathan impactofthesurfaceenergyofparticulatefoulantsonmembranefouling AT cornelissenemiler impactofthesurfaceenergyofparticulatefoulantsonmembranefouling AT honciucandrei impactofthesurfaceenergyofparticulatefoulantsonmembranefouling AT faneanthonygordon impactofthesurfaceenergyofparticulatefoulantsonmembranefouling AT chewjiawei impactofthesurfaceenergyofparticulatefoulantsonmembranefouling |