Sorption of oxyanions on nanocrystalline Mg/Al layered double hydroxides : sorption characteristics, mechanisms, and matrix interferences
Nanocrystalline Mg/Al layered double hydroxide (LDH) with nitrate intercalation produced in this study exhibited excellent affinity for polyvalent oxyanions, but comparatively less affinity for monovalent oxyhalides. Nanocrystalline LDH was prepared by a fast coprecipitation with subsequent hydrothe...
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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2010
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| Online Access: | https://hdl.handle.net/10356/40200 |
| _version_ | 1811682441999417344 |
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| author | Goh, Kok Hui |
| author2 | Dong Zhili |
| author_facet | Dong Zhili Goh, Kok Hui |
| author_sort | Goh, Kok Hui |
| collection | NTU |
| description | Nanocrystalline Mg/Al layered double hydroxide (LDH) with nitrate intercalation produced in this study exhibited excellent affinity for polyvalent oxyanions, but comparatively less affinity for monovalent oxyhalides. Nanocrystalline LDH was prepared by a fast coprecipitation with subsequent hydrothermal treatment method. The synthesized nanocrystalline LDH possessed mesoporous characteristic with a large surface area and comprised nanocrystalline grains. Interactions of oxyanions (i.e. arsenate, chromate, and vanadate) and oxyhalide (i.e. bromate) with nanocrystalline LDH were studied through stoichiometric calculations, nitrate displacement investigations, comprehensive sorption/desorption experiments, and analyses with several microscopic techniques such as XPS, EXAFS, XRD, FTIR, CHNS/O, and EDX. The influences of co-existing species on the sorption of oxyanions by nanocrystalline LDH were investigated by conducting experiment in the presence of natural organic matter (NOM) and common anions such as nitrate, silica, sulfate, carbonate, and phosphate. Arsenate sorption performances of LDHs prepared by various alternative synthetic routes were also explored and compared with those of LDHs prepared by conventional routes. |
| first_indexed | 2024-10-01T03:56:54Z |
| format | Thesis |
| id | ntu-10356/40200 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:56:54Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | ntu-10356/402002023-03-03T19:14:41Z Sorption of oxyanions on nanocrystalline Mg/Al layered double hydroxides : sorption characteristics, mechanisms, and matrix interferences Goh, Kok Hui Dong Zhili Lim Teik Thye School of Civil and Environmental Engineering DRNTU::Engineering::Environmental engineering::Water treatment Nanocrystalline Mg/Al layered double hydroxide (LDH) with nitrate intercalation produced in this study exhibited excellent affinity for polyvalent oxyanions, but comparatively less affinity for monovalent oxyhalides. Nanocrystalline LDH was prepared by a fast coprecipitation with subsequent hydrothermal treatment method. The synthesized nanocrystalline LDH possessed mesoporous characteristic with a large surface area and comprised nanocrystalline grains. Interactions of oxyanions (i.e. arsenate, chromate, and vanadate) and oxyhalide (i.e. bromate) with nanocrystalline LDH were studied through stoichiometric calculations, nitrate displacement investigations, comprehensive sorption/desorption experiments, and analyses with several microscopic techniques such as XPS, EXAFS, XRD, FTIR, CHNS/O, and EDX. The influences of co-existing species on the sorption of oxyanions by nanocrystalline LDH were investigated by conducting experiment in the presence of natural organic matter (NOM) and common anions such as nitrate, silica, sulfate, carbonate, and phosphate. Arsenate sorption performances of LDHs prepared by various alternative synthetic routes were also explored and compared with those of LDHs prepared by conventional routes. Doctor of Philosophy (CEE) 2010-06-11T06:43:31Z 2010-06-11T06:43:31Z 2010 2010 Thesis Goh, K. H. (2010). Sorption of oxyanions on nanocrystalline Mg/Al layered double hydroxides : sorption characteristics, mechanisms, and matrix interferences. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/40200 10.32657/10356/40200 en 217 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Environmental engineering::Water treatment Goh, Kok Hui Sorption of oxyanions on nanocrystalline Mg/Al layered double hydroxides : sorption characteristics, mechanisms, and matrix interferences |
| title | Sorption of oxyanions on nanocrystalline Mg/Al layered double hydroxides : sorption characteristics, mechanisms, and matrix interferences |
| title_full | Sorption of oxyanions on nanocrystalline Mg/Al layered double hydroxides : sorption characteristics, mechanisms, and matrix interferences |
| title_fullStr | Sorption of oxyanions on nanocrystalline Mg/Al layered double hydroxides : sorption characteristics, mechanisms, and matrix interferences |
| title_full_unstemmed | Sorption of oxyanions on nanocrystalline Mg/Al layered double hydroxides : sorption characteristics, mechanisms, and matrix interferences |
| title_short | Sorption of oxyanions on nanocrystalline Mg/Al layered double hydroxides : sorption characteristics, mechanisms, and matrix interferences |
| title_sort | sorption of oxyanions on nanocrystalline mg al layered double hydroxides sorption characteristics mechanisms and matrix interferences |
| topic | DRNTU::Engineering::Environmental engineering::Water treatment |
| url | https://hdl.handle.net/10356/40200 |
| work_keys_str_mv | AT gohkokhui sorptionofoxyanionsonnanocrystallinemgallayereddoublehydroxidessorptioncharacteristicsmechanismsandmatrixinterferences |