Study on the Influence Factors and Mechanism of Chromium Removal by Sulfide Nano-zero Valent Iron

Study on the Influence Factors and Mechanism of Chromium Removal by Sulfide Nano-zero Valent Iron | 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 Influence Factors and Mechanism of Chromium Removal by Sulfide Nano-zero Valent Iron Yajun Li, Yongxiang Zhang, Yuhui Lin, Wenjing Yang, Wei Du, Chonghui Zhao This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-1450331/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 In this study, two-step methods were used to prepare sulfide nano-zero valent iron and the morphology, elemental composition, surface charge, crystal structure and elemental valence were characterised. The influence factors (S/Fe ratio, initial pH and initial concentration of Cr(VI)) and the mechanism of Cr(VI) removal was determined. The results revealed that the sulphide modification could increase the removal rate of chromium. The maximum removal rate of chromium was 81 mg/g, achieved at an S/Fe ratio of 0.1. The Cr(VI) removal process by S-nZV I 0.1 is a multistep process, starting with strong adsorption to the surface of the particles by adsorption, followed by reduction of Cr(VI) to Cr(III), and finally fixing the contaminants on the S-nZV I 0.1 surface by co-precipitation. This study has great significance for preparing a remediation material that could be efficiently used for repairing of Cr(VI) contaminated sites. Zero-valent iron Chromium Ageing Removal capacity Adsorption and reduction Mechanism Full Text 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. 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. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. 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-1450331","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":96235818,"identity":"9af0e397-47c4-4aa7-be26-22bd441246e3","order_by":0,"name":"Yajun Li","email":"","orcid":"https://orcid.org/0000-0001-7747-742X","institution":"Beijing University of Technology","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Yajun","middleName":"","lastName":"Li","suffix":""},{"id":96235819,"identity":"5a56665a-cd1c-473c-a2b9-ae9df00f17d5","order_by":1,"name":"Yongxiang Zhang","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA3klEQVRIie3RIQ+CQBTA8cfcsIBWmEP8CDCCwS8D6Yq42QzI3uZ2zVn9GDS13cZ2lLMbTTY3qkEnoPnE5ub9w70X7lfuAFSq30yvj6EHrJ6d9iSoiIZfkSgDaEm8E7mcb/sl2WlifIbFJMLukcmJYMRfiyI+oPARBInQmIVyUiC3TMrjjFVEo3mEluHJSa5R+0458RryaEOKlT4waRK+CLYgtuD6wKHMPyCfb0NOAmpM5aRXvZh9pak7tvKsLJOJs+kKORmxZuQAVrWF8P4mWS42IwXo46e7KpVK9a89AQ9WTdfndKsPAAAAAElFTkSuQmCC","orcid":"https://orcid.org/0000-0001-7713-0071","institution":"Beijing University of Technology","correspondingAuthor":true,"submittingAuthor":false,"prefix":"","firstName":"Yongxiang","middleName":"","lastName":"Zhang","suffix":""},{"id":96235820,"identity":"f9b53238-e099-490b-92c9-a4a63c00e0f2","order_by":2,"name":"Yuhui Lin","email":"","orcid":"","institution":"Beijing University of Technology","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Yuhui","middleName":"","lastName":"Lin","suffix":""},{"id":96235821,"identity":"9b1ea4cb-468d-40bb-9e0d-05fcde92d3b2","order_by":3,"name":"Wenjing Yang","email":"","orcid":"","institution":"Beijing University of Technology","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Wenjing","middleName":"","lastName":"Yang","suffix":""},{"id":96235822,"identity":"a45e1d51-5f77-4135-a50f-f5e85e3d8453","order_by":4,"name":"Wei Du","email":"","orcid":"","institution":"Beijing University of Technology","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Wei","middleName":"","lastName":"Du","suffix":""},{"id":96235823,"identity":"7f0cc8e8-7b0a-4364-9a36-ba73f48df866","order_by":5,"name":"Chonghui Zhao","email":"","orcid":"","institution":"Beijing University of Technology","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Chonghui","middleName":"","lastName":"Zhao","suffix":""}],"badges":[],"createdAt":"2022-03-14 13:36:59","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-1450331/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-1450331/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":20127105,"identity":"56ed5646-7ef3-430d-8cee-80782e244a27","added_by":"auto","created_at":"2022-04-08 16:31:24","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":3631147,"visible":true,"origin":"","legend":"","description":"","filename":"ESPRD2204297reviewer.pdf","url":"https://assets-eu.researchsquare.com/files/rs-1450331/v1_covered.pdf"}],"financialInterests":"","formattedTitle":"Study on the Influence Factors and Mechanism of Chromium Removal by Sulfide Nano-zero Valent Iron","fulltext":[{"header":"Full Text","content":"This preprint is available for \u003ca href='/article/rs-1450331/latest.pdf' target='_blank'\u003edownload as a PDF\u003c/a\u003e."}],"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":false,"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":"Zero-valent iron, Chromium, Ageing, Removal capacity, Adsorption and reduction, Mechanism","lastPublishedDoi":"10.21203/rs.3.rs-1450331/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-1450331/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eIn this study, two-step methods were used to prepare sulfide nano-zero valent iron and the morphology, elemental composition, surface charge, crystal structure and elemental valence were characterised. The influence factors (S/Fe ratio, initial pH and initial concentration of Cr(VI)) and the mechanism of Cr(VI) removal was determined. The results revealed that the sulphide modification could increase the removal rate of chromium. The maximum removal rate of chromium was 81 mg/g, achieved at an S/Fe ratio of 0.1. The Cr(VI) removal process by S-nZV\u003cstrong\u003eI\u003c/strong\u003e\u003csub\u003e0.1\u003c/sub\u003e is a multistep process, starting with strong adsorption to the surface of the particles by adsorption, followed by reduction of Cr(VI) to Cr(III), and finally fixing the contaminants on the S-nZV\u003cstrong\u003eI\u003c/strong\u003e\u003csub\u003e0.1\u003c/sub\u003e surface by co-precipitation. This study has great significance for preparing a remediation material that could be efficiently used for repairing of Cr(VI) contaminated sites.\u003c/p\u003e","manuscriptTitle":"Study on the Influence Factors and Mechanism of Chromium Removal by Sulfide Nano-zero Valent Iron","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2022-04-08 16:31:08","doi":"10.21203/rs.3.rs-1450331/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","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}}],"origin":"","ownerIdentity":"4eb2b064-ba48-4837-b1bd-747ada6beb86","owner":[],"postedDate":"April 8th, 2022","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2022-05-02T07:17:32+00:00","versionOfRecord":[],"versionCreatedAt":"2022-04-08 16:31:08","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-1450331","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-1450331","identity":"rs-1450331","version":["v1"]},"buildId":"WrCJVZZCHTDjtuVLN7oU0","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}