Dissolution Behavior and Kinetics of Insulating Glass Wool under Highly Alkaline Conditions

Dissolution Behavior and Kinetics of Insulating Glass Wool under Highly Alkaline Conditions | 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 Dissolution Behavior and Kinetics of Insulating Glass Wool under Highly Alkaline Conditions Kiwon Kang, Changhyun Shim, Yulim Lee, Hyeongjin Byeon, Jaeyeong Park This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8076272/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 03 Feb, 2026 Read the published version in Korean Journal of Chemical Engineering → Version 1 posted 4 You are reading this latest preprint version Abstract This study aimed to evaluate the long-term stability of glass wool used as insulation material in domestic nuclear power plants and to quantify its degradation mechanisms and dissolution kinetics under highly alkaline conditions (pH ≥ 12) expected in cementitious environments associated with vault-type disposal systems for low-level radioactive waste. Experiments were conducted at 20°C and 80°C using cement-saturated groundwater (CGW) as the primary solution, while comparative tests were performed in NaOH and Ca(OH)₂ solutions at equivalent pH levels. ICP-OES, SEM-EDS, and XRD analyses revealed that dissolved Ca²⁺ significantly suppressed glass dissolution. The presence of abundant Ca²⁺ ions promoted densification of the surface alteration layer, retarding degradation, whereas depletion of Ca²⁺ resulted in a rapid increase in the dissolution rate. Although calcium silicate hydrate (CSH) precipitates are generally known to inhibit glass corrosion, the CSH phases formed in this study exhibited limited protective capability due to their low Ca/Si ratios and high porosity. Based on the dissolution rate constant at 20°C, the complete dissolution of glass wool was estimated to require approximately 213 years; however, under conditions of limited Ca²⁺ availability, the dissolution rate could increase by up to 70-fold, approaching that observed in NaOH solution. Glass wool glass degradation dissolution kinetics waste disposal Cement-saturated groundwater Full Text Cite Share Download PDF Status: Published Journal Publication published 03 Feb, 2026 Read the published version in Korean Journal of Chemical Engineering → Version 1 posted Reviewers agreed at journal 20 Nov, 2025 Reviewers invited by journal 20 Nov, 2025 Editor assigned by journal 12 Nov, 2025 First submitted to journal 10 Nov, 2025 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-8076272","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":547973431,"identity":"3912f6eb-8901-4920-9911-b8dd2de9c943","order_by":0,"name":"Kiwon 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Engineering","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer Subscription","inReviewEnabled":true,"inReviewRevisionsEnabled":false},"keywords":"Glass wool, glass degradation, dissolution kinetics, waste disposal, Cement-saturated groundwater","lastPublishedDoi":"10.21203/rs.3.rs-8076272/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-8076272/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eThis study aimed to evaluate the long-term stability of glass wool used as insulation material in domestic nuclear power plants and to quantify its degradation mechanisms and dissolution kinetics under highly alkaline conditions (pH\u0026thinsp;\u0026ge;\u0026thinsp;12) expected in cementitious environments associated with vault-type disposal systems for low-level radioactive waste. Experiments were conducted at 20\u0026deg;C and 80\u0026deg;C using cement-saturated groundwater (CGW) as the primary solution, while comparative tests were performed in NaOH and Ca(OH)₂ solutions at equivalent pH levels. ICP-OES, SEM-EDS, and XRD analyses revealed that dissolved Ca\u0026sup2;⁺ significantly suppressed glass dissolution. The presence of abundant Ca\u0026sup2;⁺ ions promoted densification of the surface alteration layer, retarding degradation, whereas depletion of Ca\u0026sup2;⁺ resulted in a rapid increase in the dissolution rate. Although calcium silicate hydrate (CSH) precipitates are generally known to inhibit glass corrosion, the CSH phases formed in this study exhibited limited protective capability due to their low Ca/Si ratios and high porosity. Based on the dissolution rate constant at 20\u0026deg;C, the complete dissolution of glass wool was estimated to require approximately 213 years; however, under conditions of limited Ca\u0026sup2;⁺ availability, the dissolution rate could increase by up to 70-fold, approaching that observed in NaOH solution.\u003c/p\u003e","manuscriptTitle":"Dissolution Behavior and Kinetics of Insulating Glass Wool under Highly Alkaline Conditions","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-11-27 22:47:39","doi":"10.21203/rs.3.rs-8076272/v1","editorialEvents":[{"type":"communityComments","content":0},{"type":"reviewerAgreed","content":"","date":"2025-11-20T10:33:30+00:00","index":0,"fulltext":""},{"type":"reviewersInvited","content":"","date":"2025-11-20T08:20:58+00:00","index":"","fulltext":""},{"type":"editorAssigned","content":"","date":"2025-11-12T12:34:05+00:00","index":"","fulltext":""},{"type":"submitted","content":"Korean Journal of Chemical Engineering","date":"2025-11-10T05:52:09+00:00","index":"","fulltext":""}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"korean-journal-of-chemical-engineering","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"kjce","sideBox":"Learn more about [Korean Journal of Chemical Engineering](http://link.springer.com/journal/11814)","snPcode":"11814","submissionUrl":"https://www.editorialmanager.com/kjce/default2.aspx","title":"Korean Journal of Chemical Engineering","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer Subscription","inReviewEnabled":true,"inReviewRevisionsEnabled":false}}],"origin":"","ownerIdentity":"0cd0f617-7985-475b-97d5-bd7d5700829c","owner":[],"postedDate":"November 27th, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"published-in-journal","subjectAreas":[],"tags":[],"updatedAt":"2026-02-09T16:08:05+00:00","versionOfRecord":{"articleIdentity":"rs-8076272","link":"https://doi.org/10.1007/s11814-026-00648-9","journal":{"identity":"korean-journal-of-chemical-engineering","isVorOnly":false,"title":"Korean Journal of Chemical Engineering"},"publishedOn":"2026-02-03 15:58:57","publishedOnDateReadable":"February 3rd, 2026"},"versionCreatedAt":"2025-11-27 22:47:39","video":"","vorDoi":"10.1007/s11814-026-00648-9","vorDoiUrl":"https://doi.org/10.1007/s11814-026-00648-9","workflowStages":[]},"version":"v1","identity":"rs-8076272","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-8076272","identity":"rs-8076272","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}