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dc.contributor.authorAhdab, Yvana D
dc.contributor.authorRehman, Danyal
dc.contributor.authorLienhard, John H
dc.date.accessioned2020-07-28T20:18:41Z
dc.date.available2020-07-28T20:18:41Z
dc.date.issued2020-09
dc.date.submitted2020-03
dc.identifier.issn0376-7388
dc.identifier.urihttps://hdl.handle.net/1721.1/126418
dc.description.abstractReverse osmosis (RO) is the most widely used desalination technology for treating brackish water prior to irrigation. RO, however, removes both monovalent ions (Na+,Cl−) detrimental to crops and divalent ions (Ca2+,Mg2+,SO42−) that are beneficial. These beneficial ions must then be reintroduced to the desalinated water by adding fertilizer or mixing with nutrient-rich brackish water that typically contains excess levels of monovalent ions. Unlike RO, monovalent selective electrodialysis reversal (MSED-R) removes monovalent ions, while retaining divalent ions. This paper evaluates whether Neosepta ion exchange membranes, originally manufactured to concentrate seawater for salt production, show sufficient monovalent selectivity in the brackish salinity range to be suitable for use in greenhouse agriculture. Using an MSED-R experimental set-up, 16 brackish groundwater compositions are tested to determine membrane parameters, including limiting current, membrane resistance, membrane permeability, and membrane selectivity. Across compositions, the Neosepta membranes show monovalent selectivity for sodium relative to calcium and magnesium and for chloride relative to sulfate. The membrane selectivities are used to calculate MSED-R fertilizer savings relative to RO for brackish groundwaters across the U.S. Regions in which brackish groundwaters contain greater than the target nutrient concentrations for crop growth, or show potential for MSED-R adoption, are also identified.en_US
dc.description.sponsorshipNational Science Foundation (Contract R17AC00135)en_US
dc.description.sponsorshipBureau of Reclamation (Contract R17AC00135)en_US
dc.language.isoen
dc.publisherElsevier BVen_US
dc.relation.isversionofhttp://dx.doi.org/10.1016/j.memsci.2020.118072en_US
dc.rightsCreative Commons Attribution-Noncommercial-Share Alikeen_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/en_US
dc.sourceProf. Lienharden_US
dc.titleBrackish water desalination for greenhouses: Improving groundwater quality for irrigation using monovalent selective electrodialysis reversalen_US
dc.typeArticleen_US
dc.identifier.citationAhdab, Yvana D. et al. "Brackish water desalination for greenhouses: Improving groundwater quality for irrigation using monovalent selective electrodialysis reversal." Forthcoming in Journal of Membrane Science 610 (September 2020): 118072 © 2020 Elsevier B.V.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Mechanical Engineeringen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Civil and Environmental Engineeringen_US
dc.contributor.departmentRohsenow Kendall Heat Transfer Laboratory (Massachusetts Institute of Technology)en_US
dc.relation.journalJournal of Membrane Scienceen_US
dc.eprint.versionAuthor's final manuscripten_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dc.date.updated2020-07-27T16:45:11Z
dspace.date.submission2020-07-27T16:45:15Z
mit.journal.volume610en_US
mit.licenseOPEN_ACCESS_POLICY


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