Improving groundwater quality for irrigation using monovalent selective electrodialysis
Monovalent selective electrodialysis (MSED) is a desalination technology that allows for the selective removal of monovalent ions that are detrimental to crops, while retaining divalent ions that are beneficial for crops. This paper proposes a semi-empirical MSED model that can be used to evaluate...
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| Format: | Article |
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International Desalination Association
2020
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| Online Access: | https://hdl.handle.net/1721.1/124385 |
| _version_ | 1811085109181284352 |
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| author | Rehman, Danyal Ahdab, Yvana D Lienhard, John H |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Rehman, Danyal Ahdab, Yvana D Lienhard, John H |
| author_sort | Rehman, Danyal |
| collection | MIT |
| description | Monovalent selective electrodialysis (MSED) is a desalination technology that allows for the selective
removal of monovalent ions that are detrimental to crops, while retaining divalent ions that are beneficial
for crops. This paper proposes a semi-empirical MSED model that can be used to evaluate desalination
system performance for different salinities of brackish source water. The MSED set-up is a discretized
stack modelled as an electric circuit, consisting of ohmic resistances and membrane potentials for each
ion species. The model is coupled and simultaneously validated with MSED experiments. These
experiments determine applied current density and ion transport numbers, which serve as the primary
inputs to the model. The model outputs are the concentration change of each ion species across the stack
and the system energy consumption during steady operation. Ion concentration differences represent
membrane selectivity towards monovalent/divalent ions (Na+/Ca2+ and Na+/Mg2+). Evaluation of MSED
membrane performance in the brackish salinity range will help determine the conditions that optimize
membrane selectivity and energy consumption, as well as the technology’s suitability for agricultural
applications. |
| first_indexed | 2024-09-23T13:03:03Z |
| format | Article |
| id | mit-1721.1/124385 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T13:03:03Z |
| publishDate | 2020 |
| publisher | International Desalination Association |
| record_format | dspace |
| spelling | mit-1721.1/1243852022-09-28T11:44:53Z Improving groundwater quality for irrigation using monovalent selective electrodialysis Rehman, Danyal Ahdab, Yvana D Lienhard, John H Massachusetts Institute of Technology. Department of Mechanical Engineering Monovalent selective electrodialysis (MSED) is a desalination technology that allows for the selective removal of monovalent ions that are detrimental to crops, while retaining divalent ions that are beneficial for crops. This paper proposes a semi-empirical MSED model that can be used to evaluate desalination system performance for different salinities of brackish source water. The MSED set-up is a discretized stack modelled as an electric circuit, consisting of ohmic resistances and membrane potentials for each ion species. The model is coupled and simultaneously validated with MSED experiments. These experiments determine applied current density and ion transport numbers, which serve as the primary inputs to the model. The model outputs are the concentration change of each ion species across the stack and the system energy consumption during steady operation. Ion concentration differences represent membrane selectivity towards monovalent/divalent ions (Na+/Ca2+ and Na+/Mg2+). Evaluation of MSED membrane performance in the brackish salinity range will help determine the conditions that optimize membrane selectivity and energy consumption, as well as the technology’s suitability for agricultural applications. 2020-03-27T14:44:13Z 2020-03-27T14:44:13Z 2019-10 Article http://purl.org/eprint/type/ConferencePaper https://hdl.handle.net/1721.1/124385 D. Rehman et al. “Improving groundwater quality for irrigation using monovalent selective electrodialysis,” IDA World Congress on Desalination and Water Reuse, October 2019, Dubai, India, International Desalination Association, October 2019 https://wc.idadesal.org/final-program/ IDA World Congress on Desalination and Water Reuse application/pdf International Desalination Association Prof. Lienhard |
| spellingShingle | Rehman, Danyal Ahdab, Yvana D Lienhard, John H Improving groundwater quality for irrigation using monovalent selective electrodialysis |
| title | Improving groundwater quality for irrigation using monovalent selective electrodialysis |
| title_full | Improving groundwater quality for irrigation using monovalent selective electrodialysis |
| title_fullStr | Improving groundwater quality for irrigation using monovalent selective electrodialysis |
| title_full_unstemmed | Improving groundwater quality for irrigation using monovalent selective electrodialysis |
| title_short | Improving groundwater quality for irrigation using monovalent selective electrodialysis |
| title_sort | improving groundwater quality for irrigation using monovalent selective electrodialysis |
| url | https://hdl.handle.net/1721.1/124385 |
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