Biosorption of Cr(III) and Cr(VI) from Synthetic Solutions on NaOH-Modified Peel of Artocarpus nobilis Fruit – Adsorption Equilibrium Studies

Biosorption of Cr(III) and Cr(VI) from Synthetic Solutions on NaOH-Modified Peel of Artocarpus nobilis Fruit – Adsorption Equilibrium Studies | 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 Biosorption of Cr(III) and Cr(VI) from Synthetic Solutions on NaOH-Modified Peel of Artocarpus nobilis Fruit – Adsorption Equilibrium Studies A.P.G.M.V. Samaraweera, N. Priyantha, W. S.S. Gunathilake This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6086784/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 value addition of the peel of the edible fruit of Artocarpus nobilis , a plant endemic to Sri Lanka, performed through treatment with 0.010 M NaOH solution leads to the high removal of Cr(VI) and Cr(III) demonstrating its superior nature as a biosorbent. Owing to the fact that this waste material of a locally available edible fruit employed in the biosorption process makes it low-cost, environmentally friendly and energy efficient, which are of great advantages when compared to chemical treatment procedures practiced at present. The static experiments conducted using synthetic solutions of Cr(VI) and Cr(III) ions with NaOH-modified peel of Artocarpus nobilis fruit (NWBF) lead to the optimum parameters of 0.200 biosorbent dosage, 120 min shaking time and 30 min settling time. Regression analysis of linear and nonlinear fitting of adsorption data gathered through solution analysis after the suspension of NWBF and Cr species reaches equilibrium, followed by various error function determinations indicate that the Cr(III)/NWBF system follows Langmuir, Freundlich or Temkin isotherms, while the Cr(VI)/NWBF follows Freundlich and Sips isotherms. The monolayer adsorption capacities ( q max ) determined through nonlinear curve fitting are 52.90 mg g − 1 and 14.39 mg g − 1 for Cr(VI) and Cr(III), respectively. Adsorption characteristics of NWFB are complicated due to non-homogeneous characteristics which lead to less precise results compared to those of homogeneous surfaces. Artocarpus nobilis isotherm optimization error functions linear non-linear Full Text Additional Declarations No competing interests reported. Supplementary Files GA.tiff 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-6086784","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":448550383,"identity":"4ee5132b-cd88-44b9-b16a-4a7c6a212a46","order_by":0,"name":"A.P.G.M.V. Samaraweera","email":"","orcid":"","institution":"University of Peradeniya","correspondingAuthor":false,"prefix":"","firstName":"A.P.G.M.V.","middleName":"","lastName":"Samaraweera","suffix":""},{"id":448550384,"identity":"4c605a6a-c81f-486f-b826-6da749ebea7b","order_by":1,"name":"N. 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Owing to the fact that this waste material of a locally available edible fruit employed in the biosorption process makes it low-cost, environmentally friendly and energy efficient, which are of great advantages when compared to chemical treatment procedures practiced at present. The static experiments conducted using synthetic solutions of Cr(VI) and Cr(III) ions with NaOH-modified peel of \u003cem\u003eArtocarpus nobilis\u003c/em\u003e fruit (NWBF) lead to the optimum parameters of 0.200 biosorbent dosage, 120 min shaking time and 30 min settling time. Regression analysis of linear and nonlinear fitting of adsorption data gathered through solution analysis after the suspension of NWBF and Cr species reaches equilibrium, followed by various error function determinations indicate that the Cr(III)/NWBF system follows Langmuir, Freundlich or Temkin isotherms, while the Cr(VI)/NWBF follows Freundlich and Sips isotherms. The monolayer adsorption capacities (\u003cem\u003eq\u003c/em\u003e\u003csub\u003emax\u003c/sub\u003e) determined through nonlinear curve fitting are 52.90 mg g\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e and 14.39 mg g\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e for Cr(VI) and Cr(III), respectively. Adsorption characteristics of NWFB are complicated due to non-homogeneous characteristics which lead to less precise results compared to those of homogeneous surfaces.\u003c/p\u003e","manuscriptTitle":"Biosorption of Cr(III) and Cr(VI) from Synthetic Solutions on NaOH-Modified Peel of Artocarpus nobilis Fruit – Adsorption Equilibrium Studies","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-04-28 03:16:29","doi":"10.21203/rs.3.rs-6086784/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":"53d8bb66-723a-4256-9e5e-4a1ccb7682bc","owner":[],"postedDate":"April 28th, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2026-04-08T08:43:26+00:00","versionOfRecord":[],"versionCreatedAt":"2025-04-28 03:16:29","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-6086784","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-6086784","identity":"rs-6086784","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}