Removal of calcium ions from water by selective electrosorption using target-ion specific nanocomposite electrode

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dc.citation.firstpage445en_US
dc.citation.journalTitleWater Researchen_US
dc.citation.lastpage453en_US
dc.citation.volumeNumber160en_US
dc.contributor.authorKim, Junen_US
dc.contributor.authorJain, Amiten_US
dc.contributor.authorZuo, Kuichangen_US
dc.contributor.authorVerduzco, Rafaelen_US
dc.contributor.authorWalker, Shaneen_US
dc.contributor.authorElimelech, Menachemen_US
dc.contributor.authorZhang, Zhenghuaen_US
dc.contributor.authorZhang, Xihuien_US
dc.contributor.authorLi, Qilinen_US
dc.contributor.orgNanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatmenten_US
dc.date.accessioned2019-08-16T16:07:50Zen_US
dc.date.available2019-08-16T16:07:50Zen_US
dc.date.issued2019en_US
dc.description.abstractTechnologies capable of selective removal of target contaminants from water are highly desirable to achieve “fit-for-purpose” treatment. In this study, we developed a simple yet highly effective method to achieve calcium-selective removal in an electrosorption process by coating the cathode with a calcium-selective nanocomposite (CSN) layer using an aqueous phase process. The CSN coating consisted of nano-sized calcium chelating resins with aminophosphonic groups in a sulfonated polyvinyl alcohol hydrogel matrix, which accomplished a Ca2+-over-Na+selectivity of 3.5–5.4 at Na+:Ca2+ equivalent concentration ratio from 10:1 to 1:1, 94 – 184% greater than the uncoated electrode. The CSN coated electrode exhibited complete reversibility in repeated operation. Mechanistic studies suggested that the CSN coating did not contribute to the adsorption capacity, but rather allowed preferential permeation of Ca2+ and hence increased Ca2+ adsorption on the carbon cathode. The CSN-coated electrode was very stable, showing reproducible performance in 60 repeated cycles.en_US
dc.identifier.citationKim, Jun, Jain, Amit, Zuo, Kuichang, et al.. "Removal of calcium ions from water by selective electrosorption using target-ion specific nanocomposite electrode." <i>Water Research,</i> 160, (2019) Elsevier: 445-453. https://doi.org/10.1016/j.watres.2019.05.016.en_US
dc.identifier.doihttps://doi.org/10.1016/j.watres.2019.05.016en_US
dc.identifier.urihttps://hdl.handle.net/1911/106261en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.rightsThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by Elsevier.en_US
dc.subject.keywordCalcium-selective removalen_US
dc.subject.keywordCapacitive deionizationen_US
dc.subject.keywordDesalinationen_US
dc.subject.keywordElectrosorptionen_US
dc.subject.keywordNanocomposite coatingen_US
dc.titleRemoval of calcium ions from water by selective electrosorption using target-ion specific nanocomposite electrodeen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpost-printen_US
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