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https://ptsldigital.ukm.my/jspui/handle/123456789/487064Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | Abdul Wahab Mohammad, Prof. Dato' Ir. Dr. | - |
| dc.contributor.author | Chong Woon Chan (P80624) | - |
| dc.date.accessioned | 2023-10-11T02:28:16Z | - |
| dc.date.available | 2023-10-11T02:28:16Z | - |
| dc.date.issued | 2018-07-25 | - |
| dc.identifier.other | ukmvital:121878 | - |
| dc.identifier.uri | https://ptsldigital.ukm.my/jspui/handle/123456789/487064 | - |
| dc.description | The introduction of nanofillers into membrane technology is one of the recent advancement in membrane separation process. The use of graphene oxide (GO) nanoplates in membrane fabrication has attained high attention due to its reliability, high surface area with abundance of oxygen functional groups, resulting in outstanding filtration performance. The main objective of this study is to introduce various GO nanohybrids into polyvinylidene fluoride (PVDF) membranes for permeation enhancement and membrane fouling mitigation. Zinc oxide (ZnO) was decorated on GO nanoplates via a facile precipitation method to produce ZnO/rGO nanohybrids with small ZnO particle size and high negative surface charge. The performance of neat PVDF, ZnO-PVDF and ZnO/rGO-PVDF membranes were compared in terms of hydrophilicity, permeability, morphology, bovine serum albumin rejection, flux recovery and leaching test. Later, ZnO/rGO-PVDF membranes as the best performed membrane was selected for further study. Neat PVDF and various mixed matrix membranes (MMMs) (GO-PVDF, ZnO/rGO-PVDF and AG/GO-PVDF) were characterized and assessed in algal organic matter (AOM) filtration using stirred cell. The rejections of proteins and carbohydrates as critical foulants in AOM were studied and membrane fouling resistance were investigated. Besides, the antimicrobial properties of all the membranes was evaluated by using Escherichia coli (E.coli) as a model biofoulant. Later, an algal membrane photoreactor (AMPR) was set up to assess the performance of the Ag/GO-PVDF membrane by benchmarking with a commercial membrane. The environmental impacts of the AMPRs operation using neat PVDF and Ag/GO-PVDF membranes were assessed using Simapro 8.4.0, a life cycle assessment (LCA) software. Based on the findings, the incorporation of ZnO/rGO nanohybrids had significantly enhanced the membranes permeability, anti-fouling, flux recovery and antimicrobial properties. In addition, no release of Zn element in the permeate of ZnO/rGO-PVDF membrane implied strong bonding between the GO nanohybrids with PVDF polymer. In AOM filtration, generally, all MMMs showed lower flux decline while maintaining higher protein and carbohydrate rejections. In addition, Ag/GOPVDF membrane showed the greatest antimicrobial activities among the membranes. In the AMPR filtration study, submerged membrane panels of Ag/GO-PVDF membrane showed mitigation of membrane fouling and biofouling which eventually reduced the chemical cleaning frequency. Meanwhile the removal of others compounds like phosphate, chlorine and ammoniacal-nitrogen were maintained. In LCA, the application of Ag/GO-PVDF membrane affected the AMPRs overall system life cycle in a positive way with reduced environmental footprint. Besides, high usage of fossil fuel had been identified as the main environmental hotspot in the operation of AMPR. From these findings, it can be concluded that the incorporation of GO nanohybrids into membrane fabrication greatly contributes to the development of high anti-fouling and anti-biofouling membrane.,Ph.D. | - |
| dc.language.iso | eng | - |
| dc.publisher | UKM, Bangi | - |
| dc.relation | Faculty of Engineering and Built Environment / Fakulti Kejuruteraan dan Alam Bina | - |
| dc.rights | UKM | - |
| dc.subject | Membranes (Technology) | - |
| dc.subject | Membrane separation | - |
| dc.subject | Sewage -- Purification | - |
| dc.subject | Universiti Kebangsaan Malaysia -- Dissertations | - |
| dc.subject | Dissertations, Academic -- Malaysia | - |
| dc.title | Graphene oxide nanohybrid polyvinylidene fluoride mixed matrix membranes for algal membrane photoreactor application | - |
| dc.type | Theses | - |
| dc.format.pages | 182 | - |
| dc.identifier.callno | TP159.M4C487 2018 3 tesis | - |
| dc.identifier.barcode | 005513(2021)(PL2) | - |
| Appears in Collections: | Faculty of Engineering and Built Environment / Fakulti Kejuruteraan dan Alam Bina | |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| ukmvital_121878+SOURCE1+SOURCE1.0.PDF Restricted Access | 4.57 MB | Adobe PDF |  View/Open |
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