An experimental study on biochar-modified foamed concrete: insights into the evaluation of phosphorus removal effect, adsorption kinetics, and sorption mechanisms

An experimental study on biochar-modified foamed concrete: insights into the evaluation of phosphorus removal effect, adsorption kinetics, and sorption mechanisms | 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 Article An experimental study on biochar-modified foamed concrete: insights into the evaluation of phosphorus removal effect, adsorption kinetics, and sorption mechanisms Ning Song, Chengcheng Ma, Guangqi Hu, Yushu Lai, Jiapeng Cui This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9216832/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 10 You are reading this latest preprint version Abstract The biochar based foamed concrete (RHBC-based FC) has a broad application prospect in the construction field. Moreover, considering its rich functional groups and porous characteristics, it can be used as an ideal material for water pollutant control to realize its environmental value-added value. Based on this, this article explored the combined effect of RHBC-based FC as adsorbents to treat phosphorus in wastewater. The experimental results indicated that RHBC-based FC had significant purification performance. When the replacement amount of rice husk biochar (RHBC) was 5%, the removal performance of total phosphorus (TP) was the best, 30.8% higher than that of the sample without RHBC. Therefore, excellent water purification performance could only be demonstrated with moderate RHBC content. Meanwhile, the influence of the initial concentration and adsorption time of phosphorus in wastewater on adsorption capacity and efficiency was studied using an IC analyzer. According to the outcomrd, RHBC phosphorus adsorption conformed to the Langmuir and Freundlich models, and that the data on adsorption isotherms were well-fitted. In addition, the adsorption kinetics data of RHBC followed a pseudo-first-order model. According to the analysis of FTIR, XRD, and DTG-TG results, there was no significant difference between RHBC-based FC before and after phosphorus removal soaking, which could effectively ensure the durability of FC. The SEM-EDS analysis results indicated that the adsorption effect of RHBC-based FC on P followed physical adsorption. Therefore, RHBC can serve as an effective adsorbent for FC. Physical sciences/Chemistry Earth and environmental sciences/Environmental sciences Physical sciences/Materials science Rice husk biochar Adsorption Foamed concrete Full Text Additional Declarations No competing interests reported. Supplementary Files Graphicalabstract.pdf Highlights.doc Cite Share Download PDF Status: Under Review Version 1 posted Reviews received at journal 02 May, 2026 Reviewers agreed at journal 16 Apr, 2026 Reviewers agreed at journal 12 Apr, 2026 Reviewers agreed at journal 11 Apr, 2026 Reviewers agreed at journal 08 Apr, 2026 Reviewers invited by journal 08 Apr, 2026 Editor invited by journal 07 Apr, 2026 Editor assigned by journal 25 Mar, 2026 Submission checks completed at journal 25 Mar, 2026 First submitted to journal 24 Mar, 2026 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. 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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-9216832","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":623342005,"identity":"486b29ec-ee3e-4b36-8933-498bd489d619","order_by":0,"name":"Ning 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