Study on the adsorption of ammonia nitrogen with the best modified zeolite

Study on the adsorption of ammonia nitrogen with the best modified zeolite | 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 Study on the adsorption of ammonia nitrogen with the best modified zeolite Fuchen Ban, Yuxin Wang, Yu Cheng This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6141997/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 11 Jun, 2025 Read the published version in Discover Water → Version 1 posted You are reading this latest preprint version Abstract In this paper, the natural zeolite is taken as the research object to treat the ammonia nitrogen water source, using acid, alkali and salt modification method to modify the natural zeolite, and found that the natural zeolite under NaCl modification has the best adsorption performance on ammonia nitrogen (removal rates up to 75.5% after adsorption stabilization). Then, the optimal adsorption effect of ammonia nitrogen was studied under different NaCl concentrations, zeolite particle sizes, modification time, and modification temperature. The results show that the concentration of optimal modified sodium chloride was 2 mol/L, the zeolite particle size was 80 mesh, the modification time was 6h, and the modification temperature was 20℃. The adsorption dynamics of the modified zeolite by NaCl are preliminarily explored. The R 2 of the quasi-second-order model is close to 0.99, indicating that the adsorption process follows the quasi-second-order kinetic equation. In the study of adsorption thermodynamics, ΔH is less than 0, indicating that the process of zeolite adsorption of ammonia nitrogen is an exothermic reaction. This result is consistent with the conclusion of adsorption isotherm and further proves that low temperature is beneficial for ammonia nitrogen adsorption. This provides a reference base for adsorption studies of modified zeolites in nutrient salts such as ammonia nitrogen. Natural zeolite NaCl modified zeolite Ammonia nitrogen Water treatment Adsorption Full Text Additional Declarations No competing interests reported. Supplementary Files GraphicalAbstract.pdf Cite Share Download PDF Status: Published Journal Publication published 11 Jun, 2025 Read the published version in Discover Water → 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. 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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-6141997","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":453273534,"identity":"c675df3e-7a35-447f-8e08-f875d195c85e","order_by":0,"name":"Fuchen Ban","email":"","orcid":"","institution":"Shenyang Jianzhu university","correspondingAuthor":false,"prefix":"","firstName":"Fuchen","middleName":"","lastName":"Ban","suffix":""},{"id":453273535,"identity":"7d8aa167-f025-4ca4-a2ff-843b4599b293","order_by":1,"name":"Yuxin Wang","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAy0lEQVRIiWNgGAWjYBACefb+hw8SeGyY+dkbiNRi2HOG2eCDTBq7ZM8BYq25kcMmOcPmML/BjAQidTDOyD0gzZNzWNpA8vHGGww1NtEEtbDzvEsw5jmTbmwunVZswXAsLbeBoC3tCQbJvD3WyZazc8wkGBsOE9bCcCDB4DDvP+b6DTfPEKvlRI5h4wweZ2aDGzxEajHsOZbM8IEnjVmyB+iXBGL8Is/efPwHJCoPb7zxocaGCIchAQOJBFKUQ7SQqmMUjIJRMApGBgAAtDI/wAnTnAAAAAAASUVORK5CYII=","orcid":"","institution":"Shenyang Jianzhu university","correspondingAuthor":true,"prefix":"","firstName":"Yuxin","middleName":"","lastName":"Wang","suffix":""},{"id":453273536,"identity":"3eb17da1-03fa-4721-8553-dc7c77140895","order_by":2,"name":"Yu Cheng","email":"","orcid":"","institution":"Shenyang Jianzhu university","correspondingAuthor":false,"prefix":"","firstName":"Yu","middleName":"","lastName":"Cheng","suffix":""}],"badges":[],"createdAt":"2025-03-03 02:38:08","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-6141997/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-6141997/v1","draftVersion":[],"editorialEvents":[{"content":"https://doi.org/10.1007/s43832-025-00226-w","type":"published","date":"2025-06-11T15:57:31+00:00"}],"editorialNote":"","failedWorkflow":false,"files":[{"id":84726507,"identity":"44b75883-78f5-4a4c-9bea-c1783f9fd08d","added_by":"auto","created_at":"2025-06-16 16:06:08","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":869333,"visible":true,"origin":"","legend":"","description":"","filename":"Revisedmanuscript2.pdf","url":"https://assets-eu.researchsquare.com/files/rs-6141997/v1_covered_b8f1b081-1b8c-4e24-a1fc-2d94a361aebd.pdf"},{"id":82234127,"identity":"7a6796d6-fa70-443a-a243-7c5ce734410e","added_by":"auto","created_at":"2025-05-08 06:40:18","extension":"pdf","order_by":0,"title":"","display":"","copyAsset":false,"role":"supplement","size":40485,"visible":true,"origin":"","legend":"","description":"","filename":"GraphicalAbstract.pdf","url":"https://assets-eu.researchsquare.com/files/rs-6141997/v1/316f32988fb223e264b1cb3a.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Study on the adsorption of ammonia nitrogen with the best modified zeolite","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"highlight":"","institution":"","isAcceptedByJournal":true,"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":"Natural zeolite, NaCl modified zeolite, Ammonia nitrogen, Water treatment, Adsorption","lastPublishedDoi":"10.21203/rs.3.rs-6141997/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-6141997/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eIn this paper, the natural zeolite is taken as the research object to treat the ammonia nitrogen water source, using acid, alkali and salt modification method to modify the natural zeolite, and found that the natural zeolite under NaCl modification has the best adsorption performance on ammonia nitrogen (removal rates up to 75.5% after adsorption stabilization). Then, the optimal adsorption effect of ammonia nitrogen was studied under different NaCl concentrations, zeolite particle sizes, modification time, and modification temperature. The results show that the concentration of optimal modified sodium chloride was 2 mol/L, the zeolite particle size was 80 mesh, the modification time was 6h, and the modification temperature was 20℃. The adsorption dynamics of the modified zeolite by NaCl are preliminarily explored. The R\u003csup\u003e2\u003c/sup\u003e of the quasi-second-order model is close to 0.99, indicating that the adsorption process follows the quasi-second-order kinetic equation. In the study of adsorption thermodynamics, ΔH is less than 0, indicating that the process of zeolite adsorption of ammonia nitrogen is an exothermic reaction. This result is consistent with the conclusion of adsorption isotherm and further proves that low temperature is beneficial for ammonia nitrogen adsorption. 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