Rapid ammonium adsorption using TEMPO-oxidized microcrystalline cellulose
As low as 1 ppm concentration of ammonia poses a significant threat to fish in fish farms, necessitating effective ammonia removal method to mitigate its concentration. Herein, this study explored the application of cellulose, a cost-effective and versatile green polymer, modified through TEMPO-medi...
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| Format: | Conference Paper |
| Language: | English |
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2024
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| Online Access: | https://hdl.handle.net/10356/174219 https://iwa-network.org/events/international-conference-on-wider-uptake-of-water-resource-recovery-from-wastewater-treatment-supported/ |
| _version_ | 1826116762333085696 |
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| author | Ong, Jia Hui Liang, Yen Nan Hu, Xiao Xu, Rong |
| author2 | Interdisciplinary Graduate School (IGS) |
| author_facet | Interdisciplinary Graduate School (IGS) 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 poses a significant threat to fish in fish farms, necessitating effective ammonia removal method to mitigate its concentration. Herein, this study explored the application of cellulose, a cost-effective and versatile green polymer, modified through TEMPO-mediated oxidation, for the first time for ammonia removal from water. The TEMPO-oxidized cellulose, with carboxylate group content of 0.78 mmol/g, exhibited adsorption capacity of 8.21 mg/g (empirically, 9.465 mg/g based on the Langmuir isotherm model) at pH of approximately 7.0. This capacity is comparable to existing carbon-based sorbents for ammonia reduction, and it indicates nearly 100% utilization of carboxylate adsorption sites. Notably, equilibrium adsorption was achieved within 5 minutes. The ammonium adsorption data aligns well with the Langmuir model, suggesting a monolayer chemical adsorption process. The adsorption performance of the material remained relatively stable within a pH range of 5 to 9, but it was significantly influenced by the presence of competing ions. The primary mechanisms governing material performance in ammonia removal involve electrostatic interactions and hydrogen bonding between the introduced carboxylate groups and ammonium ions. This study also delves into a comprehensive discussion on performance comparisons, alternative modification methods, cost competitiveness, and potential applications of the post-adsorption material. |
| first_indexed | 2024-10-01T04:16:57Z |
| format | Conference Paper |
| id | ntu-10356/174219 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:16:57Z |
| publishDate | 2024 |
| record_format | dspace |
| spelling | ntu-10356/1742192024-06-30T15:36:07Z Rapid ammonium adsorption using TEMPO-oxidized microcrystalline cellulose Ong, Jia Hui Liang, Yen Nan Hu, Xiao Xu, Rong Interdisciplinary Graduate School (IGS) School of Chemistry, Chemical Engineering and Biotechnology School of Materials Science and Engineering International Conference on Wider-Uptake of Water Resource Recovery from Wastewater Treatment (ICWRR 2024) Nanyang Environment and Water Research Institute Environmental Chemistry and Materials Centre (ECMC) Chemistry Engineering Ammonium Ammonia Nitrogen Removal Adsorption Cellulose TEMPO Water Carbon-based adsorbent As low as 1 ppm concentration of ammonia poses a significant threat to fish in fish farms, necessitating effective ammonia removal method to mitigate its concentration. Herein, this study explored the application of cellulose, a cost-effective and versatile green polymer, modified through TEMPO-mediated oxidation, for the first time for ammonia removal from water. The TEMPO-oxidized cellulose, with carboxylate group content of 0.78 mmol/g, exhibited adsorption capacity of 8.21 mg/g (empirically, 9.465 mg/g based on the Langmuir isotherm model) at pH of approximately 7.0. This capacity is comparable to existing carbon-based sorbents for ammonia reduction, and it indicates nearly 100% utilization of carboxylate adsorption sites. Notably, equilibrium adsorption was achieved within 5 minutes. The ammonium adsorption data aligns well with the Langmuir model, suggesting a monolayer chemical adsorption process. The adsorption performance of the material remained relatively stable within a pH range of 5 to 9, but it was significantly influenced by the presence of competing ions. The primary mechanisms governing material performance in ammonia removal involve electrostatic interactions and hydrogen bonding between the introduced carboxylate groups and ammonium ions. This study also delves into a comprehensive discussion on performance comparisons, alternative modification methods, cost competitiveness, and potential applications of the post-adsorption material. National Research Foundation (NRF) Public Utilities Board (PUB) Submitted/Accepted version This research is supported by the National Research Foundation, Singapore, and PUB, Singapore’s National Water Agency under its RIE2025 Urban Solutions and Sustainability (USS) (Water) Centre of Excellence (CoE) Programme, awarded to Nanyang Environment & Water Research Institute (NEWRI), Nanyang Technological University, Singapore (NTU). 2024-06-28T03:52:29Z 2024-06-28T03:52:29Z 2024 Conference Paper Ong, J. H., Liang, Y. N., Hu, X. & Xu, R. (2024). Rapid ammonium adsorption using TEMPO-oxidized microcrystalline cellulose. International Conference on Wider-Uptake of Water Resource Recovery from Wastewater Treatment (ICWRR 2024). https://hdl.handle.net/10356/174219 https://iwa-network.org/events/international-conference-on-wider-uptake-of-water-resource-recovery-from-wastewater-treatment-supported/ en © 2024 International Water Association. All rights reserved. This article may be downloaded for personal use only. Any other use requires prior permission of the copyright holder. application/pdf |
| spellingShingle | Chemistry Engineering Ammonium Ammonia Nitrogen Removal Adsorption Cellulose TEMPO Water Carbon-based adsorbent Ong, Jia Hui Liang, Yen Nan Hu, Xiao Xu, Rong Rapid ammonium adsorption using TEMPO-oxidized microcrystalline cellulose |
| title | Rapid ammonium adsorption using TEMPO-oxidized microcrystalline cellulose |
| title_full | Rapid ammonium adsorption using TEMPO-oxidized microcrystalline cellulose |
| title_fullStr | Rapid ammonium adsorption using TEMPO-oxidized microcrystalline cellulose |
| title_full_unstemmed | Rapid ammonium adsorption using TEMPO-oxidized microcrystalline cellulose |
| title_short | Rapid ammonium adsorption using TEMPO-oxidized microcrystalline cellulose |
| title_sort | rapid ammonium adsorption using tempo oxidized microcrystalline cellulose |
| topic | Chemistry Engineering Ammonium Ammonia Nitrogen Removal Adsorption Cellulose TEMPO Water Carbon-based adsorbent |
| url | https://hdl.handle.net/10356/174219 https://iwa-network.org/events/international-conference-on-wider-uptake-of-water-resource-recovery-from-wastewater-treatment-supported/ |
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