Removal of fine iron-oxide particles after post-filtration in local potable water using an electrophoretic method
Potable water from several residential areas on the east coast of Malaysia was filtered using a polyethersulphone (PES) membrane to separate the coarse and fine iron-oxide particles inside the pipelines. The as-received samples consisted of a wide distribution of particle sizes, ranging from 5 μm to...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2016
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| Online Access: | http://psasir.upm.edu.my/id/eprint/46011/1/Removal%20of%20fine%20iron-oxide%20particles%20after%20post-filtration%20in%20local%20potable%20water%20using%20an%20electrophoretic%20method.pdf |
| _version_ | 1796974606155776000 |
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| author | Naim, Mohd Nazli Yeon, Hui Ting Zakaria, Rabitah Samsu Baharuddin, Azhari Md. Yunos, Khairul Faezah Abu Bakar, Noor Fitrah Lenggoro, Ignatius Wuled |
| author_facet | Naim, Mohd Nazli Yeon, Hui Ting Zakaria, Rabitah Samsu Baharuddin, Azhari Md. Yunos, Khairul Faezah Abu Bakar, Noor Fitrah Lenggoro, Ignatius Wuled |
| author_sort | Naim, Mohd Nazli |
| collection | UPM |
| description | Potable water from several residential areas on the east coast of Malaysia was filtered using a polyethersulphone (PES) membrane to separate the coarse and fine iron-oxide particles inside the pipelines. The as-received samples consisted of a wide distribution of particle sizes, ranging from 5 μm to 400 nm. The concentration of fine iron-oxide particles inside a distribution system was extremely low. Hence, a specific method is necessary to concentrate and separate the fine particles from the coarse ones. To study the fine particles from the bulk, excess pressure was applied to the membrane filter so that the clogged particles were released into the permeate. A 100 kDa PES membrane was used to separate the particles, because the samples consisted of a wide molecular-weight cut-off range from 89 g/mol goethite (α-FeOOH) to 231 g/mol hematite (Fe2O3). After the filtration process, the size distribution of permeated particles reduced to 550–400 nm. Through X-ray diffraction analysis, numerous polymorphs such as α-FeOOH, Fe3O4, Fe2O3 and maghemite were detected from the samples. The zeta potential value of the permeated particles changed from −18.5 to −13 mV, suggesting that the dispersity of permeated iron-oxide particles became unstable, but remained adequate for electrophoretic deposition (EPD). The fibrous carbon electrode used in the EPD process, could remove up to 87% of the permeated iron-oxide particles compared to solid carbon electrodes (<56%). A high-surface-area, porous electrode and a moderate applied voltage were preferred in order to minimise gas formation, reduce the electro-osmosis effect and increase the deposition efficiency. |
| first_indexed | 2024-03-06T08:59:29Z |
| format | Article |
| id | upm.eprints-46011 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T08:59:29Z |
| publishDate | 2016 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | upm.eprints-460112016-06-07T08:18:07Z http://psasir.upm.edu.my/id/eprint/46011/ Removal of fine iron-oxide particles after post-filtration in local potable water using an electrophoretic method Naim, Mohd Nazli Yeon, Hui Ting Zakaria, Rabitah Samsu Baharuddin, Azhari Md. Yunos, Khairul Faezah Abu Bakar, Noor Fitrah Lenggoro, Ignatius Wuled Potable water from several residential areas on the east coast of Malaysia was filtered using a polyethersulphone (PES) membrane to separate the coarse and fine iron-oxide particles inside the pipelines. The as-received samples consisted of a wide distribution of particle sizes, ranging from 5 μm to 400 nm. The concentration of fine iron-oxide particles inside a distribution system was extremely low. Hence, a specific method is necessary to concentrate and separate the fine particles from the coarse ones. To study the fine particles from the bulk, excess pressure was applied to the membrane filter so that the clogged particles were released into the permeate. A 100 kDa PES membrane was used to separate the particles, because the samples consisted of a wide molecular-weight cut-off range from 89 g/mol goethite (α-FeOOH) to 231 g/mol hematite (Fe2O3). After the filtration process, the size distribution of permeated particles reduced to 550–400 nm. Through X-ray diffraction analysis, numerous polymorphs such as α-FeOOH, Fe3O4, Fe2O3 and maghemite were detected from the samples. The zeta potential value of the permeated particles changed from −18.5 to −13 mV, suggesting that the dispersity of permeated iron-oxide particles became unstable, but remained adequate for electrophoretic deposition (EPD). The fibrous carbon electrode used in the EPD process, could remove up to 87% of the permeated iron-oxide particles compared to solid carbon electrodes (<56%). A high-surface-area, porous electrode and a moderate applied voltage were preferred in order to minimise gas formation, reduce the electro-osmosis effect and increase the deposition efficiency. Elsevier 2016-02 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/46011/1/Removal%20of%20fine%20iron-oxide%20particles%20after%20post-filtration%20in%20local%20potable%20water%20using%20an%20electrophoretic%20method.pdf Naim, Mohd Nazli and Yeon, Hui Ting and Zakaria, Rabitah and Samsu Baharuddin, Azhari and Md. Yunos, Khairul Faezah and Abu Bakar, Noor Fitrah and Lenggoro, Ignatius Wuled (2016) Removal of fine iron-oxide particles after post-filtration in local potable water using an electrophoretic method. Journal of Water Process Engineering, 9. pp. 208-214. ISSN 2214-7144 http://www.sciencedirect.com/science/article/pii/S2214714416300101 10.1016/j.jwpe.2016.01.006 |
| spellingShingle | Naim, Mohd Nazli Yeon, Hui Ting Zakaria, Rabitah Samsu Baharuddin, Azhari Md. Yunos, Khairul Faezah Abu Bakar, Noor Fitrah Lenggoro, Ignatius Wuled Removal of fine iron-oxide particles after post-filtration in local potable water using an electrophoretic method |
| title | Removal of fine iron-oxide particles after post-filtration in local potable water using an electrophoretic method |
| title_full | Removal of fine iron-oxide particles after post-filtration in local potable water using an electrophoretic method |
| title_fullStr | Removal of fine iron-oxide particles after post-filtration in local potable water using an electrophoretic method |
| title_full_unstemmed | Removal of fine iron-oxide particles after post-filtration in local potable water using an electrophoretic method |
| title_short | Removal of fine iron-oxide particles after post-filtration in local potable water using an electrophoretic method |
| title_sort | removal of fine iron oxide particles after post filtration in local potable water using an electrophoretic method |
| url | http://psasir.upm.edu.my/id/eprint/46011/1/Removal%20of%20fine%20iron-oxide%20particles%20after%20post-filtration%20in%20local%20potable%20water%20using%20an%20electrophoretic%20method.pdf |
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