Preparation of composites with MgAl-LDH-modified commercial activated carbon for the quick removal of Cr from aqueous solutions.

Preparation of composites with MgAl-LDH-modified commercial activated carbon for the quick removal of Cr from aqueous solutions. | 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 Preparation of composites with MgAl-LDH-modified commercial activated carbon for the quick removal of Cr from aqueous solutions. Ying Sun, Zexu Wang, Shijie Zhang, Chuyin Liu, Yunfeng Xu This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4091293/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 6 You are reading this latest preprint version Abstract The problem of soil and water contamination caused by Cr discharged from dyeing, electroplating and metallurgical industries has become increasingly serious, which is a potentially great threat to the environment and public health. Therefore, it is essential to develop a quick, efficient and low-cost adsorbent for the remediation of Cr-contaminated wastewater. In this work, we successfully prepared MgAl-LDH/ commercial activated carbon nanocomposites (LDH-CAC) with hydrothermal. The effects of activated carbon type and loading on LDH-CAC were investigated. Moveover, we also have examined the adsorption capacity and adsorption behavior of LDH-CAC on Cr(VI), and proposed a potential removal mechanism. Lastly, the reusability of LDH-CAC was researched. The results showed that the prepared LDH-CAC@1 had the best removal performance at the commercial activated carbon type of CAC-103 and activated carbon loading of 1.0 g. The adsorption behavior study, on the other hand, indicated that LDH-CAC @1 could reach adsorption equilibrium within 10 min with a maximum adsorption capacity of 116.7 mg/g, which was significantly better than MgAl-LDH (10.7 mg/g) and CAC (21.3 mg/g). The primary removal mechanisms included adsorption-coupled reduction, ion exchange, surface precipitation, and electrostatic attraction. Reusability experiment revealed that the removal efficiency of LDH-CAC@1 decreased by 25.1% after four cycles, which illustrated the promising reusability of [email protected] study provides an effective adsorbent with a remarkably fast reaction, which has positive environmental significance for the treatment of Cr (VI) wastewater. Adsorption Layered double hydroxide Activated carbon Cr (VI) Hydrothermal༛LDH-AC Full Text Cite Share Download PDF Status: Under Review Version 1 posted Editorial decision: Major Revision 05 Apr, 2024 Reviewers agreed at journal 29 Mar, 2024 Reviewers invited by journal 29 Mar, 2024 Editor invited by journal 25 Mar, 2024 Editor assigned by journal 19 Mar, 2024 First submitted to journal 14 Mar, 2024 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. 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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-4091293","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":285323289,"identity":"b4ba99a2-0b0a-425d-b531-b3f8b574b1cb","order_by":0,"name":"Ying Sun","email":"","orcid":"","institution":"Shanghai University School of Environmental and Chemical Engineering","correspondingAuthor":false,"prefix":"","firstName":"Ying","middleName":"","lastName":"Sun","suffix":""},{"id":285323290,"identity":"f5e963ad-9eb5-4c02-a49b-1980b319b3f0","order_by":1,"name":"Zexu Wang","email":"","orcid":"","institution":"Shanghai University School of Environmental and Chemical Engineering","correspondingAuthor":false,"prefix":"","firstName":"Zexu","middleName":"","lastName":"Wang","suffix":""},{"id":285323291,"identity":"d6191259-b7a8-43db-82bd-ff46f3f88ad3","order_by":2,"name":"Shijie Zhang","email":"","orcid":"","institution":"Shanghai University School of Environmental and Chemical Engineering","correspondingAuthor":false,"prefix":"","firstName":"Shijie","middleName":"","lastName":"Zhang","suffix":""},{"id":285323292,"identity":"376ea7eb-0acf-47e2-a5d8-ea3a08316efa","order_by":3,"name":"Chuyin Liu","email":"","orcid":"","institution":"Shanghai University School of Environmental and Chemical Engineering","correspondingAuthor":false,"prefix":"","firstName":"Chuyin","middleName":"","lastName":"Liu","suffix":""},{"id":285323293,"identity":"f8997ba9-1ae9-4eec-b24c-e116094e9bbc","order_by":4,"name":"Yunfeng Xu","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAtklEQVRIiWNgGAWjYDAC5gMMDB8YDoCYBkRqYUtgYJxBshZmHpK0GBzjMZO2+XMnsYG9eZsEQ80dYrSwpUnntj1LbOA5VibBcOwZEVruNx+Tzm04nNggkWMmwdhwmBhbGNukLf4Atci/IVoL8zFpBjaQLTxEapE8xpZs2dt22LiNJ63YIuEYEVr4jvEY3vjx57BsP/vhjTc+1BChReEAlMEGIhIIa2BgkG8gRtUoGAWjYBSMbAAAk0I6XdPTyEIAAAAASUVORK5CYII=","orcid":"","institution":"Shanghai University School of Environmental and Chemical Engineering","correspondingAuthor":true,"prefix":"","firstName":"Yunfeng","middleName":"","lastName":"Xu","suffix":""}],"badges":[],"createdAt":"2024-03-13 09:33:41","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-4091293/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-4091293/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":53949881,"identity":"7db4e499-9cdf-4ee4-a9c2-52a64bfb13c4","added_by":"auto","created_at":"2024-04-02 15:35:17","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1167180,"visible":true,"origin":"","legend":"","description":"","filename":"Manuscript..pdf","url":"https://assets-eu.researchsquare.com/files/rs-4091293/v1_covered_8938876e-8f0b-4d7a-bf13-0ef486c57f75.pdf"}],"financialInterests":"","formattedTitle":"Preparation of composites with MgAl-LDH-modified commercial activated carbon for the quick removal of Cr from aqueous solutions.","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"highlight":"","institution":"","isAcceptedByJournal":true,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":true,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"environmental-science-and-pollution-research","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"espr","sideBox":"Learn more about [Environmental Science and Pollution Research](https://www.springer.com/journal/11356)","snPcode":"11356","submissionUrl":"https://submission.nature.com/new-submission/11356/3","title":"Environmental Science and Pollution Research","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false},"keywords":"Adsorption, Layered double hydroxide, Activated carbon, Cr (VI), Hydrothermal༛LDH-AC","lastPublishedDoi":"10.21203/rs.3.rs-4091293/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4091293/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eThe problem of soil and water contamination caused by Cr discharged from dyeing, electroplating and metallurgical industries has become increasingly serious, which is a potentially great threat to the environment and public health. Therefore, it is essential to develop a quick, efficient and low-cost adsorbent for the remediation of Cr-contaminated wastewater. In this work, we successfully prepared MgAl-LDH/ commercial activated carbon nanocomposites (LDH-CAC) with hydrothermal. The effects of activated carbon type and loading on LDH-CAC were investigated. Moveover, we also have examined the adsorption capacity and adsorption behavior of LDH-CAC on Cr(VI), and proposed a potential removal mechanism. Lastly, the reusability of LDH-CAC was researched. The results showed that the prepared LDH-CAC@1 had the best removal performance at the commercial activated carbon type of CAC-103 and activated carbon loading of 1.0 g. The adsorption behavior study, on the other hand, indicated that LDH-CAC @1 could reach adsorption equilibrium within 10 min with a maximum adsorption capacity of 116.7 mg/g, which was significantly better than MgAl-LDH (10.7 mg/g) and CAC (21.3 mg/g). 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