Synergistic oxidation and adsorption of As(III) in water using biochar-mediated Fe(II)/nano-CaO2 system

Synergistic oxidation and adsorption of As(III) in water using biochar-mediated Fe(II)/nano-CaO2 system | 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 Synergistic oxidation and adsorption of As(III) in water using biochar-mediated Fe(II)/nano-CaO2 system Silu Lv, Kaixia Zuo, Mingyue Hu, Xuewen Xie, Min Liao, Jie Li, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-3950712/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 Due to its mobility and high toxicity, As(III) can easily migrate and accumulate through the food chain, endangering human health. The common treatment method for As(III) is a combination of oxidation and adsorption, in which the Fenton-like method exhibits a prominent removal performance. Based on our previous work, the Fe(II)/nano-CaO 2 /biochar Fenton-like system with excellent oxidizing and adsorption capabilities was used to remove As(III) from water. Compared to the common oxidation systems, the Fe(II)/nano-CaO 2 /RBC system showed an excellent As(III) removal through simultaneous oxidation and adsorption. The research findings demonstrated that under the cooperative effects of Fe(II) hydrolysis and RBC catalysis, As(III) in water could be efficiently removed in a broad initial 3.0–10.0 pH range, which solved the challenge of pH elevation that other metal peroxide systems encountered. In this system, most of the common co-existing cations and anions had no discernible impact on the As(III) elimination process, and some of the humic acid (HA) (< 60 mg L − 1 ) was mineralized simultaneously. Quenching and characterization experiments confirmed that •OH dominated the oxidation of As(III), and •OH production was boosted by the addition of RBC. The purification of oxidized As(V) from water can be achieved by binding it with Fe and Ca through the synthetic action of electrostatic adsorption, surface complexation, and co-precipitation. Overall, this work presents an alternative approach for effectively eliminating As(III) from water. Arsenite Calcium peroxide nanoparticle Biochar Oxidation Adsorption Full Text Supplementary Files Supportinginformation.docx 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. 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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-3950712","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":276987794,"identity":"945263a5-0ab5-43ca-a4ec-22577df39946","order_by":0,"name":"Silu Lv","email":"","orcid":"","institution":"Chengdu University of Technology","correspondingAuthor":false,"prefix":"","firstName":"Silu","middleName":"","lastName":"Lv","suffix":""},{"id":276987795,"identity":"4ce2fd7e-7426-4682-9935-f54624e129d0","order_by":1,"name":"Kaixia Zuo","email":"","orcid":"","institution":"Chengdu University of 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The common treatment method for As(III) is a combination of oxidation and adsorption, in which the Fenton-like method exhibits a prominent removal performance. Based on our previous work, the Fe(II)/nano-CaO\u003csub\u003e2\u003c/sub\u003e/biochar Fenton-like system with excellent oxidizing and adsorption capabilities was used to remove As(III) from water. Compared to the common oxidation systems, the Fe(II)/nano-CaO\u003csub\u003e2\u003c/sub\u003e/RBC system showed an excellent As(III) removal through simultaneous oxidation and adsorption. The research findings demonstrated that under the cooperative effects of Fe(II) hydrolysis and RBC catalysis, As(III) in water could be efficiently removed in a broad initial 3.0\u0026ndash;10.0 pH range, which solved the challenge of pH elevation that other metal peroxide systems encountered. In this system, most of the common co-existing cations and anions had no discernible impact on the As(III) elimination process, and some of the humic acid (HA) (\u0026lt;\u0026thinsp;60 mg L\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e) was mineralized simultaneously. Quenching and characterization experiments confirmed that \u0026bull;OH dominated the oxidation of As(III), and \u0026bull;OH production was boosted by the addition of RBC. The purification of oxidized As(V) from water can be achieved by binding it with Fe and Ca through the synthetic action of electrostatic adsorption, surface complexation, and co-precipitation. Overall, this work presents an alternative approach for effectively eliminating As(III) from water.\u003c/p\u003e","manuscriptTitle":"Synergistic oxidation and adsorption of As(III) in water using biochar-mediated Fe(II)/nano-CaO2 system","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2024-03-11 17:10:18","doi":"10.21203/rs.3.rs-3950712/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":"23b3c93c-acc1-4f1e-853d-9dabe8bac9b4","owner":[],"postedDate":"March 11th, 2024","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2024-08-08T20:01:57+00:00","versionOfRecord":[],"versionCreatedAt":"2024-03-11 17:10:18","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-3950712","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-3950712","identity":"rs-3950712","version":["v1"]},"buildId":"qtupq5eGEP_6zYnWcrvyt","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}