Study on the adsorption performance of manganese dioxide loaded modified biochar composite materials for cadmium ions (Ⅱ) in solution

Study on the adsorption performance of manganese dioxide loaded modified biochar composite materials for cadmium ions (Ⅱ) in solution | 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 performance of manganese dioxide loaded modified biochar composite materials for cadmium ions (Ⅱ) in solution Hui Wang, Anqi Wang, Jiangtao Ji, Xiaohua Zhang, Yujie Wang, Wenxuan Zhang, and 4 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4419330/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 The manganese dioxide loaded peanut shell activated carbon composite material (MnO 2 -AC) was prepared by coprecipitation method using peanut shell and natural graphite as raw materials. The response surface methodology (RSM) was used to screen the optimal preparation condition for AC (carbon alkali ratio 2:3, time 5h, temperature 700℃) and the preparation process has been optimized. MnO 2 -AC was synthesized by loading AC and MnO 2 under the optimal preparation condition.The adsorption effect of Cd 2+ in aqueous solution was compared, and the effects of pH value and ion strength on Cd 2+ adsorption were investigated. The adsorption kinetics and isothermal adsorption characteristics were analyzed. The results showed that the surface of modified MnO 2 -AC exhibits spherical aggregates with rougher surfaces, more micropores, and larger specific surface area. In comparison to BC and AC, MnO 2 -AC possessed more surface adsorption sites and oxygen-containing functional groups. Kinetic adsorption studies have shown that the maximum adsorption capacity of MnO 2 -AC (138.14mg·g − 1 ) for Cd 2+ has significantly increased, which is 3.06 and 1.15 times higher than that of BC (45.16mg·g − 1 ) and AC (119.21mg·g − 1 ), respectively. The adsorption capacity has increased by 205.9% and 15.8%, respectively. At the same time, the adsorption capacity of MnO 2 -AC for Cd 2+ remained as high as 60.96mg·g − 1 after 6 adsorption desorption cycles, with an increase of 217.83% and 32.15% compared to the adsorption capacity of BC (19.18mg·g − 1 ) and AC (46.13mg·g − 1 ) after 6 adsorption desorption cycles, respectively, proving that MnO 2 -AC has good reusability. MnO 2 -AC loaded modification has significant adsorption effects on heavy metal ions, and has good application potential. MnO2 modified biochar Adsorption heavy metal Full Text Additional Declarations No competing interests reported. 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-4419330","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":305568945,"identity":"e4dbf6aa-065a-483a-814b-d425cf1f8fe9","order_by":0,"name":"Hui Wang","email":"","orcid":"","institution":"Henan University of Science and Technology","correspondingAuthor":false,"prefix":"","firstName":"Hui","middleName":"","lastName":"Wang","suffix":""},{"id":305568946,"identity":"ab372045-db53-44c3-87e3-41db17b9e671","order_by":1,"name":"Anqi Wang","email":"","orcid":"","institution":"Henan University of Science and 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Technology","correspondingAuthor":false,"prefix":"","firstName":"Qiaolin","middleName":"","lastName":"Liu","suffix":""}],"badges":[],"createdAt":"2024-05-14 12:51:13","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-4419330/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-4419330/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":57475977,"identity":"39859a56-dd2a-47cf-b05a-ead51f6a84b2","added_by":"auto","created_at":"2024-05-31 08:07:32","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1165386,"visible":true,"origin":"","legend":"","description":"","filename":"manuscript.pdf","url":"https://assets-eu.researchsquare.com/files/rs-4419330/v1_covered_97a6e66e-a15f-4b47-984f-cfc22c393053.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Study on the adsorption performance of manganese dioxide loaded modified biochar composite materials for cadmium ions (Ⅱ) in solution","fulltext":[],"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":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":"MnO2 modified, biochar, Adsorption, heavy metal","lastPublishedDoi":"10.21203/rs.3.rs-4419330/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4419330/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eThe manganese dioxide loaded peanut shell activated carbon composite material (MnO\u003csub\u003e2\u003c/sub\u003e-AC) was prepared by coprecipitation method using peanut shell and natural graphite as raw materials. The response surface methodology (RSM) was used to screen the optimal preparation condition for AC (carbon alkali ratio 2:3, time 5h, temperature 700℃) and the preparation process has been optimized. MnO\u003csub\u003e2\u003c/sub\u003e-AC was synthesized by loading AC and MnO\u003csub\u003e2\u003c/sub\u003e under the optimal preparation condition.The adsorption effect of Cd\u003csup\u003e2+\u003c/sup\u003e in aqueous solution was compared, and the effects of pH value and ion strength on Cd\u003csup\u003e2+\u003c/sup\u003e adsorption were investigated. The adsorption kinetics and isothermal adsorption characteristics were analyzed. The results showed that the surface of modified MnO\u003csub\u003e2\u003c/sub\u003e-AC exhibits spherical aggregates with rougher surfaces, more micropores, and larger specific surface area. In comparison to BC and AC, MnO\u003csub\u003e2\u003c/sub\u003e-AC possessed more surface adsorption sites and oxygen-containing functional groups. Kinetic adsorption studies have shown that the maximum adsorption capacity of MnO\u003csub\u003e2\u003c/sub\u003e-AC (138.14mg\u0026middot;g\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e) for Cd\u003csup\u003e2+\u003c/sup\u003e has significantly increased, which is 3.06 and 1.15 times higher than that of BC (45.16mg\u0026middot;g\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e) and AC (119.21mg\u0026middot;g\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e), respectively. \u003cem\u003eThe adsorption capacity has increased by 205.9% and 15.8%, respectively. At the same time, the adsorption capacity of MnO\u003c/em\u003e\u003csub\u003e\u003cem\u003e2\u003c/em\u003e\u003c/sub\u003e\u003cem\u003e-AC for Cd\u003c/em\u003e\u003csup\u003e\u003cem\u003e2+\u003c/em\u003e\u003c/sup\u003e \u003cem\u003eremained as high as 60.96mg\u0026middot;g\u003c/em\u003e\u003csup\u003e\u003cem\u003e\u0026minus;\u0026thinsp;1\u003c/em\u003e\u003c/sup\u003e \u003cem\u003eafter 6 adsorption desorption cycles, with an increase of 217.83% and 32.15% compared to the adsorption capacity of BC (19.18mg\u0026middot;g\u003c/em\u003e\u003csup\u003e\u003cem\u003e\u0026minus;\u0026thinsp;1\u003c/em\u003e\u003c/sup\u003e\u003cem\u003e) and AC (46.13mg\u0026middot;g\u003c/em\u003e\u003csup\u003e\u003cem\u003e\u0026minus;\u0026thinsp;1\u003c/em\u003e\u003c/sup\u003e\u003cem\u003e) after 6 adsorption desorption cycles, respectively, proving that MnO\u003c/em\u003e\u003csub\u003e\u003cem\u003e2\u003c/em\u003e\u003c/sub\u003e\u003cem\u003e-AC has good reusability.\u003c/em\u003e MnO\u003csub\u003e2\u003c/sub\u003e-AC loaded modification has significant adsorption effects on heavy metal ions, and has good application potential.\u003c/p\u003e \u003cp\u003e \u003c/p\u003e","manuscriptTitle":"Study on the adsorption performance of manganese dioxide loaded modified biochar composite materials for cadmium ions (Ⅱ) in solution","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2024-05-23 04:22:36","doi":"10.21203/rs.3.rs-4419330/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":"d08f932c-c22c-41c6-8ae1-fe2377d0026c","owner":[],"postedDate":"May 23rd, 2024","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2024-05-31T07:59:25+00:00","versionOfRecord":[],"versionCreatedAt":"2024-05-23 04:22:36","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-4419330","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-4419330","identity":"rs-4419330","version":["v1"]},"buildId":"qtupq5eGEP_6zYnWcrvyt","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}