Study on process optimization and mechanism of quartz sand acid leaching and purification

Study on process optimization and mechanism of quartz sand acid leaching and purification | 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 process optimization and mechanism of quartz sand acid leaching and purification ziyang Bai, Huan Xiong, Yupeng He, Youjun Lu, Bo Ma, Wenzhou Sun, and 3 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7901739/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 11 You are reading this latest preprint version Abstract With quartz sand (SP1) from a certain place as the study object, its treatment conditions were optimized and the removal effect of key impurities was analyzed by adopting a stepwise single-acid or mixed-acid experimental scheme. The experiment had three stages: pretreatment, acid washing purification, and post-treatment. The SP1 samples and those subjected to optimal acid washing conditions were characterized using qualitative or quantitative tests such as X-ray diffraction, Raman spectroscopy, scanning electron microscopy, and inductively coupled plasma mass spectrometry. The result showed when quartz sand was treated with 70 mL of hydrofluoric acid in a single-acid system at 120°C for 2 hours, with the purity reaching 99.9963%. For the mixed-acid system, the volume ratio of hydrofluoric acid, hydrochloric acid, and nitric acid was maintained at 1:6:2, and acid leaching was conducted under constant temperature conditions at 120°C for 5 hours. Under these parameters, the contents of aluminum and iron were reduced to 15.23 and 0.15 µg/g, respectively, with the purity of the acid-washed quartz sand reaching and the production yield reaching 99.9964% and 82.11%, respectively. Based on the comprehensive consideration of purification effectiveness and process economy, the volume ratio of hydrochloric acid, nitric acid, and hydrofluoric acid selected was 1:6:2, and acid washing purification was performed for a reaction time of 5 hours. The purity of the acid-washed quartz sand reached 99.996%, and the impurity removal mechanism of hydrogen fluoride on quartz sand was clarified, which provided a theoretical basis for the standardized production of quartz sand. Quartz sand Impurity occurrence Acid washing process Gradient experiment Impurity removal mechanism Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Review Version 1 posted Reviews received at journal 03 Feb, 2026 Reviews received at journal 22 Jan, 2026 Reviewers agreed at journal 15 Jan, 2026 Reviews received at journal 14 Jan, 2026 Reviewers agreed at journal 12 Jan, 2026 Reviewers agreed at journal 12 Jan, 2026 Reviewers agreed at journal 06 Dec, 2025 Reviewers invited by journal 03 Dec, 2025 Editor assigned by journal 23 Oct, 2025 Submission checks completed at journal 23 Oct, 2025 First submitted to journal 19 Oct, 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-7901739","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":554987577,"identity":"825ea868-5b7f-4922-b231-bc9899311566","order_by":0,"name":"ziyang Bai","email":"","orcid":"","institution":"North Minzu University","correspondingAuthor":false,"prefix":"","firstName":"ziyang","middleName":"","lastName":"Bai","suffix":""},{"id":554987578,"identity":"aecdc1a7-e288-405a-b0b5-c09ebad597d2","order_by":1,"name":"Huan Xiong","email":"","orcid":"","institution":"Ningxia SiFusion Co., 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The experiment had three stages: pretreatment, acid washing purification, and post-treatment. The SP1 samples and those subjected to optimal acid washing conditions were characterized using qualitative or quantitative tests such as X-ray diffraction, Raman spectroscopy, scanning electron microscopy, and inductively coupled plasma mass spectrometry. The result showed when quartz sand was treated with 70 mL of hydrofluoric acid in a single-acid system at 120\u0026deg;C for 2 hours, with the purity reaching 99.9963%. For the mixed-acid system, the volume ratio of hydrofluoric acid, hydrochloric acid, and nitric acid was maintained at 1:6:2, and acid leaching was conducted under constant temperature conditions at 120\u0026deg;C for 5 hours. Under these parameters, the contents of aluminum and iron were reduced to 15.23 and 0.15 \u0026micro;g/g, respectively, with the purity of the acid-washed quartz sand reaching and the production yield reaching 99.9964% and 82.11%, respectively. Based on the comprehensive consideration of purification effectiveness and process economy, the volume ratio of hydrochloric acid, nitric acid, and hydrofluoric acid selected was 1:6:2, and acid washing purification was performed for a reaction time of 5 hours. The purity of the acid-washed quartz sand reached 99.996%, and the impurity removal mechanism of hydrogen fluoride on quartz sand was clarified, which provided a theoretical basis for the standardized production of quartz sand.\u003c/p\u003e","manuscriptTitle":"Study on process optimization and mechanism of quartz sand acid leaching and purification","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-12-05 17:44:48","doi":"10.21203/rs.3.rs-7901739/v1","editorialEvents":[{"type":"communityComments","content":0},{"type":"editorInvitedReview","content":"","date":"2026-02-03T14:08:38+00:00","index":"hide","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2026-01-23T00:31:14+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"101369208507182244781404910721183882878","date":"2026-01-15T08:59:55+00:00","index":"hide","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2026-01-14T20:02:42+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"266075007999126219756305080597401213811","date":"2026-01-12T11:26:15+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"211677313841548980158354222616824151915","date":"2026-01-12T09:03:18+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"250111296950491010992037058788874816664","date":"2025-12-06T05:41:31+00:00","index":"hide","fulltext":""},{"type":"reviewersInvited","content":"","date":"2025-12-04T03:00:29+00:00","index":"","fulltext":""},{"type":"editorAssigned","content":"","date":"2025-10-23T10:25:21+00:00","index":"","fulltext":""},{"type":"checksComplete","content":"","date":"2025-10-23T10:25:17+00:00","index":"","fulltext":""},{"type":"submitted","content":"Silicon","date":"2025-10-20T03:17:48+00:00","index":"","fulltext":""}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"silicon","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"scon","sideBox":"Learn more about [Silicon](https://www.springer.com/journal/12633)","snPcode":"12633","submissionUrl":"https://submission.nature.com/new-submission/12633/3","title":"Silicon","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false}}],"origin":"","ownerIdentity":"99da0df8-546e-4efc-bc69-77c1726c6ec9","owner":[],"postedDate":"December 5th, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"under-review","subjectAreas":[],"tags":[],"updatedAt":"2025-12-05T17:44:48+00:00","versionOfRecord":[],"versionCreatedAt":"2025-12-05 17:44:48","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-7901739","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-7901739","identity":"rs-7901739","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}