{"paper_id":"4d98e98f-3efa-47a3-aeca-270eda6d9f51","body_text":"Optimizing NaCl-modified zeolite for efficient ammonia nitrogen removal in rural drinking water treatment | 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 Optimizing NaCl-modified zeolite for efficient ammonia nitrogen removal in rural drinking water treatment Yuying Fan, Shuo Li, Jingyue Ma, Jing Zu, Qingkai Ren This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8326076/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 5 You are reading this latest preprint version Abstract Ammonia-nitrogen (NH 4 + –N) is one of the most common pollutants in drinking water in rural areas where low-cost, sustainable processes are preferred in the removal process. Consequently, it is crucial that development of both the control and removal processes for the NH 4 + –N in water through cost-effective efficient methods to the utilization of the domestic/drinking water. In this study, the J20 was selected as the adsorbent to remove NH 4 + –N from rural wastewater, and optiomized the modification conditions to increase the adsroption capacity. It was found that the NaCl soaking method significantly improved the adsorption capacity of zeolites, and the modification condition was optimized by the response surface methodology using 6.25% concentration of NaCl with an incubation time of about 10.37 h. Under this condition, a maximum adsorption capacity for NH 4 + –N by means of modified J20 zeolite, reached about 31.6 mg/g, which is 23.41 times that of the unmodified state. Through the detection of drinking water-related indicators, the modified zeolite material did not cause secondary pollution. This study provides a technical support for the low-cost and efficient removal of NH 4 + –N in rural drinking water. Adsorption Water treatment Ammonia-nitrogen Denitrification Zeolite Modification Full Text Cite Share Download PDF Status: Under Review Version 1 posted Reviewers agreed at journal 25 Dec, 2025 Reviewers invited by journal 19 Dec, 2025 Editor invited by journal 18 Dec, 2025 Editor assigned by journal 15 Dec, 2025 First submitted to journal 11 Dec, 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. 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-8326076\",\"acceptedTermsAndConditions\":true,\"allowDirectSubmit\":false,\"archivedVersions\":[],\"articleType\":\"Research Article\",\"associatedPublications\":[],\"authors\":[{\"id\":563110373,\"identity\":\"722bb282-2b90-42b7-ace0-f76576da0de0\",\"order_by\":0,\"name\":\"Yuying Fan\",\"email\":\"\",\"orcid\":\"\",\"institution\":\"Changchun Institute of Technology\",\"correspondingAuthor\":false,\"prefix\":\"\",\"firstName\":\"Yuying\",\"middleName\":\"\",\"lastName\":\"Fan\",\"suffix\":\"\"},{\"id\":563110374,\"identity\":\"f947d3f2-000f-4d23-b539-54246bd6f274\",\"order_by\":1,\"name\":\"Shuo 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treatment\",\"fulltext\":[],\"fulltextSource\":\"\",\"fullText\":\"\",\"funders\":[],\"hasAdminPriorityOnWorkflow\":false,\"hasManuscriptDocX\":false,\"hasOptedInToPreprint\":true,\"hasPassedJournalQc\":\"\",\"hasAnyPriority\":false,\"hideJournal\":false,\"highlight\":\"\",\"institution\":\"\",\"isAcceptedByJournal\":false,\"isAuthorSuppliedPdf\":true,\"isDeskRejected\":\"\",\"isHiddenFromSearch\":false,\"isInQc\":false,\"isInWorkflow\":false,\"isPdf\":true,\"isPdfUpToDate\":true,\"isWithdrawnOrRetracted\":false,\"journal\":{\"display\":true,\"email\":\"info@researchsquare.com\",\"identity\":\"environmental-science-and-pollution-research\",\"isNatureJournal\":false,\"hasQc\":true,\"allowDirectSubmit\":false,\"externalIdentity\":\"espr\",\"sideBox\":\"Learn more about [Environmental Science and Pollution Research](https://www.springer.com/journal/11356)\",\"snPcode\":\"11356\",\"submissionUrl\":\"https://submission.nature.com/new-submission/11356/3\",\"title\":\"Environmental Science and Pollution Research\",\"twitterHandle\":\"\",\"acdcEnabled\":true,\"dfaEnabled\":true,\"editorialSystem\":\"em\",\"reportingPortfolio\":\"Springer Hybrid\",\"inReviewEnabled\":true,\"inReviewRevisionsEnabled\":false},\"keywords\":\"Adsorption, Water treatment, Ammonia-nitrogen, Denitrification, Zeolite, Modification\",\"lastPublishedDoi\":\"10.21203/rs.3.rs-8326076/v1\",\"lastPublishedDoiUrl\":\"https://doi.org/10.21203/rs.3.rs-8326076/v1\",\"license\":{\"name\":\"CC BY 4.0\",\"url\":\"https://creativecommons.org/licenses/by/4.0/\"},\"manuscriptAbstract\":\"\\u003cp\\u003eAmmonia-nitrogen (NH\\u003csub\\u003e4\\u003c/sub\\u003e\\u003csup\\u003e+\\u003c/sup\\u003e\\u0026ndash;N) is one of the most common pollutants in drinking water in rural areas where low-cost, sustainable processes are preferred in the removal process. Consequently, it is crucial that development of both the control and removal processes for the NH\\u003csub\\u003e4\\u003c/sub\\u003e\\u003csup\\u003e+\\u003c/sup\\u003e\\u0026ndash;N in water through cost-effective efficient methods to the utilization of the domestic/drinking water. In this study, the J20 was selected as the adsorbent to remove NH\\u003csub\\u003e4\\u003c/sub\\u003e\\u003csup\\u003e+\\u003c/sup\\u003e\\u0026ndash;N from rural wastewater, and optiomized the modification conditions to increase the adsroption capacity. It was found that the NaCl soaking method significantly improved the adsorption capacity of zeolites, and the modification condition was optimized by the response surface methodology using 6.25% concentration of NaCl with an incubation time of about 10.37 h. Under this condition, a maximum adsorption capacity for NH\\u003csub\\u003e4\\u003c/sub\\u003e\\u003csup\\u003e+\\u003c/sup\\u003e\\u0026ndash;N by means of modified J20 zeolite, reached about 31.6 mg/g, which is 23.41 times that of the unmodified state. Through the detection of drinking water-related indicators, the modified zeolite material did not cause secondary pollution. This study provides a technical support for the low-cost and efficient removal of NH\\u003csub\\u003e4\\u003c/sub\\u003e\\u003csup\\u003e+\\u003c/sup\\u003e\\u0026ndash;N in rural drinking water.\\u003c/p\\u003e\",\"manuscriptTitle\":\"Optimizing NaCl-modified zeolite for efficient ammonia nitrogen removal in rural drinking water treatment\",\"msid\":\"\",\"msnumber\":\"\",\"nonDraftVersions\":[{\"code\":1,\"date\":\"2025-12-22 14:08:38\",\"doi\":\"10.21203/rs.3.rs-8326076/v1\",\"editorialEvents\":[{\"type\":\"communityComments\",\"content\":0},{\"type\":\"reviewerAgreed\",\"content\":\"\",\"date\":\"2025-12-25T14:01:23+00:00\",\"index\":0,\"fulltext\":\"\"},{\"type\":\"reviewersInvited\",\"content\":\"\",\"date\":\"2025-12-19T17:01:47+00:00\",\"index\":\"\",\"fulltext\":\"\"},{\"type\":\"editorInvited\",\"content\":\"Environmental Science and Pollution Research\",\"date\":\"2025-12-18T11:51:03+00:00\",\"index\":\"\",\"fulltext\":\"\"},{\"type\":\"editorAssigned\",\"content\":\"\",\"date\":\"2025-12-15T05:15:53+00:00\",\"index\":\"\",\"fulltext\":\"\"},{\"type\":\"submitted\",\"content\":\"Environmental Science and Pollution Research\",\"date\":\"2025-12-12T00:39:27+00:00\",\"index\":\"\",\"fulltext\":\"\"}],\"status\":\"published\",\"journal\":{\"display\":true,\"email\":\"info@researchsquare.com\",\"identity\":\"environmental-science-and-pollution-research\",\"isNatureJournal\":false,\"hasQc\":true,\"allowDirectSubmit\":false,\"externalIdentity\":\"espr\",\"sideBox\":\"Learn more about [Environmental Science and Pollution Research](https://www.springer.com/journal/11356)\",\"snPcode\":\"11356\",\"submissionUrl\":\"https://submission.nature.com/new-submission/11356/3\",\"title\":\"Environmental Science and Pollution Research\",\"twitterHandle\":\"\",\"acdcEnabled\":true,\"dfaEnabled\":true,\"editorialSystem\":\"em\",\"reportingPortfolio\":\"Springer Hybrid\",\"inReviewEnabled\":true,\"inReviewRevisionsEnabled\":false}}],\"origin\":\"\",\"ownerIdentity\":\"438d6d97-de9a-401f-ad23-073be0744828\",\"owner\":[],\"postedDate\":\"December 22nd, 2025\",\"published\":true,\"recentEditorialEvents\":[],\"rejectedJournal\":[],\"revision\":\"\",\"amendment\":\"\",\"status\":\"under-review\",\"subjectAreas\":[],\"tags\":[],\"updatedAt\":\"2025-12-22T14:08:39+00:00\",\"versionOfRecord\":[],\"versionCreatedAt\":\"2025-12-22 14:08:38\",\"video\":\"\",\"vorDoi\":\"\",\"vorDoiUrl\":\"\",\"workflowStages\":[]},\"version\":\"v1\",\"identity\":\"rs-8326076\",\"journalConfig\":\"researchsquare\"},\"__N_SSP\":true},\"page\":\"/article/[identity]/[[...version]]\",\"query\":{\"redirect\":\"/article/rs-8326076\",\"identity\":\"rs-8326076\",\"version\":[\"v1\"]},\"buildId\":\"8U1c8b4HqxoKbykW_rLl7\",\"isFallback\":false,\"isExperimentalCompile\":false,\"dynamicIds\":[84888],\"gssp\":true,\"scriptLoader\":[]}","source_license":"CC-BY-4.0","license_restricted":false}