Ion-Exchange Adsorption of Cerium (III) Using AmberChrom 50WX2 Resin: Investigation of Mechanisms and Process Optimization.

Ion-Exchange Adsorption of Cerium (III) Using AmberChrom 50WX2 Resin: Investigation of Mechanisms and Process Optimization. | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Ion-Exchange Adsorption of Cerium (III) Using AmberChrom 50WX2 Resin: Investigation of Mechanisms and Process Optimization. Lawrence Brandon Hermalin, Hameed Muhamad, Huu Doan This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7926439/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Rare earth elements (REEs) are essential to modern technologies, yet their recovery from secondary sources remains a major challenge. This study investigated the adsorption of cerium (III), selected as a model REE, onto AmberChrom 50WX2, a commercial cation-exchange resin. Batch experiments evaluated the effects of resin dosage, solution pH, and initial concentration on adsorption performance, supported by kinetic, isotherm, and thermodynamic modeling. The Elovich model best fit the adsorption kinetics, consistent with reversible ion-exchange (specific ionic bonding) between Ce³⁺ and the resin sites, rather than irreversible chemisorption, while equilibrium data were consistent with the Langmuir isotherm, confirming monolayer adsorption on a homogeneous surface. Adsorption capacity increased with initial concentration but decreased per unit mass at higher resin dosages, as expected. Thermodynamic analysis revealed the process to be endothermic and increasingly spontaneous with temperature. AmberChrom 50WX2 exhibited stable performance over four adsorption–desorption cycles, demonstrating reusability, though it showed limited selectivity among trivalent REEs of similar ionic radii. These findings highlight the potential of AmberChrom 50WX2 for bulk REE recovery under acidic conditions typical of waste streams, providing a foundation for process development at larger scales. Adsorption Rare earth metal Isotherm model Resin Ion-Exchange Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-7926439","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":542533231,"identity":"3557a4e1-8587-448e-b298-1d29a48e2c13","order_by":0,"name":"Lawrence Brandon Hermalin","email":"","orcid":"","institution":"Toronto metropolitan University","correspondingAuthor":false,"prefix":"","firstName":"Lawrence","middleName":"Brandon","lastName":"Hermalin","suffix":""},{"id":542533232,"identity":"152ae714-c1aa-4cbf-ac4a-e4d6575604a3","order_by":1,"name":"Hameed 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This study investigated the adsorption of cerium (III), selected as a model REE, onto AmberChrom 50WX2, a commercial cation-exchange resin. Batch experiments evaluated the effects of resin dosage, solution pH, and initial concentration on adsorption performance, supported by kinetic, isotherm, and thermodynamic modeling. The Elovich model best fit the adsorption kinetics, consistent with reversible ion-exchange (specific ionic bonding) between Ce\u0026sup3;⁺ and the resin sites, rather than irreversible chemisorption, while equilibrium data were consistent with the Langmuir isotherm, confirming monolayer adsorption on a homogeneous surface. Adsorption capacity increased with initial concentration but decreased per unit mass at higher resin dosages, as expected. Thermodynamic analysis revealed the process to be endothermic and increasingly spontaneous with temperature. AmberChrom 50WX2 exhibited stable performance over four adsorption\u0026ndash;desorption cycles, demonstrating reusability, though it showed limited selectivity among trivalent REEs of similar ionic radii. These findings highlight the potential of AmberChrom 50WX2 for bulk REE recovery under acidic conditions typical of waste streams, providing a foundation for process development at larger scales.\u003c/p\u003e","manuscriptTitle":"Ion-Exchange Adsorption of Cerium (III) Using AmberChrom 50WX2 Resin: Investigation of Mechanisms and Process Optimization.","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-11-14 05:27:07","doi":"10.21203/rs.3.rs-7926439/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"b2734242-3559-47de-af66-c88809133dc5","owner":[],"postedDate":"November 14th, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2025-11-18T08:39:09+00:00","versionOfRecord":[],"versionCreatedAt":"2025-11-14 05:27:07","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-7926439","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-7926439","identity":"rs-7926439","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}