TEMPO-Oxidized microcrystalline cellulose for rapid adsorption of ammonium
As low as 1 ppm concentration of ammonia is sufficient to pose a threat to fish cultured in the fish farm, and therefore effective ammonia removal method is necessary to minimize the ammonia concentration. In this study, cellulose, which is one of the low-cost and highly versatile green polymers, ha...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/161989 |
| _version_ | 1811685686301949952 |
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| author | Ong, Jia Hui Liang, Yen Nan Hu, Xiao Xu, Rong |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Ong, Jia Hui Liang, Yen Nan Hu, Xiao Xu, Rong |
| author_sort | Ong, Jia Hui |
| collection | NTU |
| description | As low as 1 ppm concentration of ammonia is sufficient to pose a threat to fish cultured in the fish farm, and therefore effective ammonia removal method is necessary to minimize the ammonia concentration. In this study, cellulose, which is one of the low-cost and highly versatile green polymers, has been modified by TEMPO-mediated oxidation and first applied for ammonia removal from water. For the TEMPO-oxidized cellulose of 0.78 mmol/g carboxylate group content, the adsorption capacity was measured to be 8.21 mg/g (empirically, 9.465 mg/g derived from Langmuir isotherm model) from water at pH around 7.0, which is comparable with the existing carbon-based sorbent for the reduction of ammonia. This also indicates close to 100% utilization of the carboxylate adsorption sites. In addition, equilibrium adsorption can be achieved within 5 min. The ammonium adsorption data fit the Langmuir model very well, indicating a monolayer chemical adsorption process. The adsorption performance of the material was minimally influenced by a pH range of 5.0-9.0 but substantially affected by the presence of competing ions. Despite a slight decrease in adsorption performance, the material can be regenerated and applied in a real water sample. Electrostatic interaction and hydrogen bonding between the introduced carboxylate groups and ammonium ions appear to be the adsorption mechanisms governing the material performance in ammonia removal. Further discussion on performance comparison, alternative modification methods, production cost, and potential usage of the postadsorption material is also included. |
| first_indexed | 2024-10-01T04:48:28Z |
| format | Journal Article |
| id | ntu-10356/161989 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:48:28Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1619892022-09-28T04:33:09Z TEMPO-Oxidized microcrystalline cellulose for rapid adsorption of ammonium Ong, Jia Hui Liang, Yen Nan Hu, Xiao Xu, Rong School of Materials Science and Engineering School of Chemical and Biomedical Engineering Nanyang Environment and Water Research Institute Environmental Chemistry and Materials Centre Engineering::Environmental engineering Engineering::Chemical technology Ammonia Concentrations Carboxylate Groups As low as 1 ppm concentration of ammonia is sufficient to pose a threat to fish cultured in the fish farm, and therefore effective ammonia removal method is necessary to minimize the ammonia concentration. In this study, cellulose, which is one of the low-cost and highly versatile green polymers, has been modified by TEMPO-mediated oxidation and first applied for ammonia removal from water. For the TEMPO-oxidized cellulose of 0.78 mmol/g carboxylate group content, the adsorption capacity was measured to be 8.21 mg/g (empirically, 9.465 mg/g derived from Langmuir isotherm model) from water at pH around 7.0, which is comparable with the existing carbon-based sorbent for the reduction of ammonia. This also indicates close to 100% utilization of the carboxylate adsorption sites. In addition, equilibrium adsorption can be achieved within 5 min. The ammonium adsorption data fit the Langmuir model very well, indicating a monolayer chemical adsorption process. The adsorption performance of the material was minimally influenced by a pH range of 5.0-9.0 but substantially affected by the presence of competing ions. Despite a slight decrease in adsorption performance, the material can be regenerated and applied in a real water sample. Electrostatic interaction and hydrogen bonding between the introduced carboxylate groups and ammonium ions appear to be the adsorption mechanisms governing the material performance in ammonia removal. Further discussion on performance comparison, alternative modification methods, production cost, and potential usage of the postadsorption material is also included. Nanyang Technological University This work was partially supported by NTU-Harvard Joint Programme on Sustainable Nanotechnology (SusNano) (Grant 002054-00001). 2022-09-28T04:33:08Z 2022-09-28T04:33:08Z 2022 Journal Article Ong, J. H., Liang, Y. N., Hu, X. & Xu, R. (2022). TEMPO-Oxidized microcrystalline cellulose for rapid adsorption of ammonium. Industrial and Engineering Chemistry Research, 61(22), 7665-7673. https://dx.doi.org/10.1021/acs.iecr.1c04599 0888-5885 https://hdl.handle.net/10356/161989 10.1021/acs.iecr.1c04599 2-s2.0-85125226095 22 61 7665 7673 en 002054-00001 Industrial and Engineering Chemistry Research © 2022 American Chemical Society. All rights reserved. |
| spellingShingle | Engineering::Environmental engineering Engineering::Chemical technology Ammonia Concentrations Carboxylate Groups Ong, Jia Hui Liang, Yen Nan Hu, Xiao Xu, Rong TEMPO-Oxidized microcrystalline cellulose for rapid adsorption of ammonium |
| title | TEMPO-Oxidized microcrystalline cellulose for rapid adsorption of ammonium |
| title_full | TEMPO-Oxidized microcrystalline cellulose for rapid adsorption of ammonium |
| title_fullStr | TEMPO-Oxidized microcrystalline cellulose for rapid adsorption of ammonium |
| title_full_unstemmed | TEMPO-Oxidized microcrystalline cellulose for rapid adsorption of ammonium |
| title_short | TEMPO-Oxidized microcrystalline cellulose for rapid adsorption of ammonium |
| title_sort | tempo oxidized microcrystalline cellulose for rapid adsorption of ammonium |
| topic | Engineering::Environmental engineering Engineering::Chemical technology Ammonia Concentrations Carboxylate Groups |
| url | https://hdl.handle.net/10356/161989 |
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