Adsorption and separation performance of platinum group metals using a novel MPE-TDGA/SiO2 -P adsorbent

Adsorption and separation performance of platinum group metals using a novel MPE-TDGA/SiO2 -P adsorbent | 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 Adsorption and separation performance of platinum group metals using a novel MPE-TDGA/SiO2 -P adsorbent Mai Tanaka, Naoki Osawa, Hao Wu, Masahiko Kubota, Seong-Yun Kim This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8746943/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 For the efficient separation of platinum group metals (PGMs) from high-level radioactive liquid waste (HLLW), a novel adsorbent, N,N' -dimethyl- N,N' -di-(2-phenylethyl)-thiodiglycolamide (MPE-TDGA) impregnated on macroporous silica–polymer composite particles (SiO₂-P), MPE-TDGA/SiO₂-P, was developed. Characterization of MPE-TDGA/SiO₂-P confirmed successful impregnation of the extractant into the SiO₂-P. In the adsorption and separation of PGMs from simulated HLLW in batch experiments, MPE-TDGA/SiO₂-P afforded nearly 100% Pd(II) adsorption efficiency; the adsorption efficiencies for Ru(III) and Rh(III) increased at higher temperatures. Ru(III), Rh(III), and Pd(II) were individually separated through a two-stage column process. MPE-TDGA/SiO₂-P is a promising adsorbent for the practical separation of PGMs from HLLW. High-level liquid waste MPE-TDGA extractant Impregnated adsorbent Adsorption and separation of platinum group metals 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. 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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-8746943","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":607480750,"identity":"92aa2071-9c76-4e87-b5dd-10fd260c56b2","order_by":0,"name":"Mai Tanaka","email":"","orcid":"","institution":"Japan Nuclear Fuel Limited","correspondingAuthor":false,"prefix":"","firstName":"Mai","middleName":"","lastName":"Tanaka","suffix":""},{"id":607480751,"identity":"3363e079-2806-4aa7-85f5-9605a090a82c","order_by":1,"name":"Naoki Osawa","email":"","orcid":"","institution":"Nagaoka University of Technology","correspondingAuthor":false,"prefix":"","firstName":"Naoki","middleName":"","lastName":"Osawa","suffix":""},{"id":607480752,"identity":"bdbc37b2-d277-4117-9e91-6cfecd2b11f5","order_by":2,"name":"Hao Wu","email":"","orcid":"","institution":"Shanghai Jiao Tong University","correspondingAuthor":false,"prefix":"","firstName":"Hao","middleName":"","lastName":"Wu","suffix":""},{"id":607480753,"identity":"e1412db0-6782-41fc-8b34-9c4f93c3752b","order_by":3,"name":"Masahiko Kubota","email":"","orcid":"","institution":"Tohoku University","correspondingAuthor":false,"prefix":"","firstName":"Masahiko","middleName":"","lastName":"Kubota","suffix":""},{"id":607480754,"identity":"9de43f85-38e3-453c-885a-106437bf5565","order_by":4,"name":"Seong-Yun Kim","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAABDUlEQVRIie3RsUrEMBjA8e+oZErNJt+Roa+QECgI5Z7lINCpg6MgaEHoLed+Yg+fwc2xEjiXWNfCLT7AHfgEYntVOKGBG4XLf8jQ5ke/NAA+3z9OkG4NvxIAhODnYXUAoSTFwwn0xOyT4aLZ3YqHz6BOz6yADX2/ZvzWKAqTCEZvg58Rtk55aCEmPBOjEtc4LldaU9Ayh3o6SDCLeVhA0pGAijWKJlOGQtBut2JwsMUfMq1/yY2TQNOTuCdVtSPtYMZJhLXqfFmgIjy9eFnmeny/SLUsxassHGeJZnPZbItEPj7op49tPmEMtcHN5VXEcPiPtZ1gd+NdezvakQhah4Dg0/GCzV3E5/P5jqtvtkBRDJRwT7kAAAAASUVORK5CYII=","orcid":"","institution":"Tohoku University","correspondingAuthor":true,"prefix":"","firstName":"Seong-Yun","middleName":"","lastName":"Kim","suffix":""}],"badges":[],"createdAt":"2026-01-31 06:09:42","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-8746943/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-8746943/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":105035503,"identity":"7daacf04-fd95-4fe4-a53d-666c1b116307","added_by":"auto","created_at":"2026-03-20 07:26:12","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1225600,"visible":true,"origin":"","legend":"","description":"","filename":"APSORCmanuscriptMaiTanaka.pdf","url":"https://assets-eu.researchsquare.com/files/rs-8746943/v1_covered_6f5c4b35-ebec-4cec-ad9f-98222b1d19c7.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Adsorption and separation performance of platinum group metals using a novel MPE-TDGA/SiO2 -P adsorbent","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"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},"keywords":"High-level liquid waste, MPE-TDGA extractant, Impregnated adsorbent, Adsorption and separation of platinum group metals","lastPublishedDoi":"10.21203/rs.3.rs-8746943/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-8746943/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eFor the efficient separation of platinum group metals (PGMs) from high-level radioactive liquid waste (HLLW), a novel adsorbent, \u003cem\u003eN,N'\u003c/em\u003e-dimethyl-\u003cem\u003eN,N'\u003c/em\u003e-di-(2-phenylethyl)-thiodiglycolamide (MPE-TDGA) impregnated on macroporous silica\u0026ndash;polymer composite particles (SiO₂-P), MPE-TDGA/SiO₂-P, was developed. 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