Gypsum scaling and membrane integrity of osmotically driven membranes: The effect of membrane materials and operating conditions
The emerging thin film composite (TFC) forward osmosis (FO) and pressure retarded osmosis (PRO) membranes generally have better separation properties compared with their cellulose triacetate (CTA) counterparts. Nevertheless, their scaling performance has been rarely reported. In the current study, t...
| Váldodahkkit: | , , , , , , |
|---|---|
| Eará dahkkit: | |
| Materiálatiipa: | Journal Article |
| Giella: | English |
| Almmustuhtton: |
2015
|
| Fáttát: | |
| Liŋkkat: | https://hdl.handle.net/10356/80879 http://hdl.handle.net/10220/38875 |
| _version_ | 1826114874334248960 |
|---|---|
| author | Zhang, Minmin Wang, Yi-Ning Järvelä, Eliisa Wei, Jing Kyllönen, Hanna Wang, Rong Tang, Chuyang Y. |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Zhang, Minmin Wang, Yi-Ning Järvelä, Eliisa Wei, Jing Kyllönen, Hanna Wang, Rong Tang, Chuyang Y. |
| author_sort | Zhang, Minmin |
| collection | NTU |
| description | The emerging thin film composite (TFC) forward osmosis (FO) and pressure retarded osmosis (PRO) membranes generally have better separation properties compared with their cellulose triacetate (CTA) counterparts. Nevertheless, their scaling performance has been rarely reported. In the current study, the phenomenon of membrane integrity loss as a result of scaling is reported for the first time for osmotically driven membrane processes (ODMPs). The results show that the TFC membrane suffered marked flux reduction during the scaling in the active-layer-facing-feed-solution (AL-FS) orientation, accompanied with the severe damage of the membrane active layer. The membrane integrity loss is attributed to the scale formation and growth in the confined space between the membrane and the feed spacer. Compared with the CTA membrane, the TFC was more prone to scaling and membrane damage due to its unfavorable physiochemical properties (presence of Ca2+ binding sites and ridge-and-valley roughness). Although antiscalant addition was shown to be effective for scaling control in AL-FS, it was ineffective in the active-layer-facing-draw-solution orientation. The current study reveals the critical need for scaling control in ODMP processes with respect to the membrane integrity and flux stability. The results also have far-reaching implications for FO and PRO membrane design and process operation. |
| first_indexed | 2024-10-01T03:46:19Z |
| format | Journal Article |
| id | ntu-10356/80879 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:46:19Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-10356/808792020-03-07T11:43:28Z Gypsum scaling and membrane integrity of osmotically driven membranes: The effect of membrane materials and operating conditions Zhang, Minmin Wang, Yi-Ning Järvelä, Eliisa Wei, Jing Kyllönen, Hanna Wang, Rong Tang, Chuyang Y. School of Civil and Environmental Engineering Singapore Membrane Technology Centre DRNTU::Engineering::Environmental engineering::Water treatment The emerging thin film composite (TFC) forward osmosis (FO) and pressure retarded osmosis (PRO) membranes generally have better separation properties compared with their cellulose triacetate (CTA) counterparts. Nevertheless, their scaling performance has been rarely reported. In the current study, the phenomenon of membrane integrity loss as a result of scaling is reported for the first time for osmotically driven membrane processes (ODMPs). The results show that the TFC membrane suffered marked flux reduction during the scaling in the active-layer-facing-feed-solution (AL-FS) orientation, accompanied with the severe damage of the membrane active layer. The membrane integrity loss is attributed to the scale formation and growth in the confined space between the membrane and the feed spacer. Compared with the CTA membrane, the TFC was more prone to scaling and membrane damage due to its unfavorable physiochemical properties (presence of Ca2+ binding sites and ridge-and-valley roughness). Although antiscalant addition was shown to be effective for scaling control in AL-FS, it was ineffective in the active-layer-facing-draw-solution orientation. The current study reveals the critical need for scaling control in ODMP processes with respect to the membrane integrity and flux stability. The results also have far-reaching implications for FO and PRO membrane design and process operation. MOE (Min. of Education, S’pore) Accepted version 2015-12-01T04:27:46Z 2019-12-06T14:16:29Z 2015-12-01T04:27:46Z 2019-12-06T14:16:29Z 2016 Journal Article Wang, Y.-N., Järvelä, E., Wei, J., Zhang, M., Kyllönen, H., Wang, R., et al. (2015). Gypsum scaling and membrane integrity of osmotically driven membranes: The effect of membrane materials and operating conditions. Desalination, 377, 1-10. 0011-9164 https://hdl.handle.net/10356/80879 http://hdl.handle.net/10220/38875 10.1016/j.desal.2015.08.024 en Desalination © 2015 Elsevier B.V. This is the author created version of a work that has been peer reviewed and accepted for publication by Desalination, Elsevier B.V. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1016/j.desal.2015.08.024]. 23 p. + figures and tables application/pdf application/pdf application/pdf |
| spellingShingle | DRNTU::Engineering::Environmental engineering::Water treatment Zhang, Minmin Wang, Yi-Ning Järvelä, Eliisa Wei, Jing Kyllönen, Hanna Wang, Rong Tang, Chuyang Y. Gypsum scaling and membrane integrity of osmotically driven membranes: The effect of membrane materials and operating conditions |
| title | Gypsum scaling and membrane integrity of osmotically driven membranes: The effect of membrane materials and operating conditions |
| title_full | Gypsum scaling and membrane integrity of osmotically driven membranes: The effect of membrane materials and operating conditions |
| title_fullStr | Gypsum scaling and membrane integrity of osmotically driven membranes: The effect of membrane materials and operating conditions |
| title_full_unstemmed | Gypsum scaling and membrane integrity of osmotically driven membranes: The effect of membrane materials and operating conditions |
| title_short | Gypsum scaling and membrane integrity of osmotically driven membranes: The effect of membrane materials and operating conditions |
| title_sort | gypsum scaling and membrane integrity of osmotically driven membranes the effect of membrane materials and operating conditions |
| topic | DRNTU::Engineering::Environmental engineering::Water treatment |
| url | https://hdl.handle.net/10356/80879 http://hdl.handle.net/10220/38875 |
| work_keys_str_mv | AT zhangminmin gypsumscalingandmembraneintegrityofosmoticallydrivenmembranestheeffectofmembranematerialsandoperatingconditions AT wangyining gypsumscalingandmembraneintegrityofosmoticallydrivenmembranestheeffectofmembranematerialsandoperatingconditions AT jarvelaeliisa gypsumscalingandmembraneintegrityofosmoticallydrivenmembranestheeffectofmembranematerialsandoperatingconditions AT weijing gypsumscalingandmembraneintegrityofosmoticallydrivenmembranestheeffectofmembranematerialsandoperatingconditions AT kyllonenhanna gypsumscalingandmembraneintegrityofosmoticallydrivenmembranestheeffectofmembranematerialsandoperatingconditions AT wangrong gypsumscalingandmembraneintegrityofosmoticallydrivenmembranestheeffectofmembranematerialsandoperatingconditions AT tangchuyangy gypsumscalingandmembraneintegrityofosmoticallydrivenmembranestheeffectofmembranematerialsandoperatingconditions |