Sustainable Neutralization of Acidic Soapstock Wastewater Using Phosphorite Waste: Kinetic and Environmental Assessment

Sustainable Neutralization of Acidic Soapstock Wastewater Using Phosphorite Waste: Kinetic and Environmental Assessment | 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 Sustainable Neutralization of Acidic Soapstock Wastewater Using Phosphorite Waste: Kinetic and Environmental Assessment Sanjarbek Shamuratov, Umidbek Baltaev, Umarbek Alimov, Azizbek Matmuratov, and 2 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9065790/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 acidic wastewater produced during cotton soapstock processing is a major environmental concern because of its low pH and high ionic strength. In this study, the feasibility of using Central Kyzylkum phosphorite waste as a sustainable mineral-based neutralizing agent was investigated under controlled batch conditions (333 K, 30 min). The experimental data revealed an increase in pH from 4.10 to 7.30, which corresponds to a neutralization efficiency of 78.05%, and an increase in CaO content from 23.92% to 36.96% (54.51% enrichment). Linear regression analysis (CaO = 3.4665·pH + 9.7852; R² = 0.911; F = 51.18; RMSE = 1.07%) revealed the strong statistical correlation between acidity stabilization and calcium activation. Residual analysis showed homoscedastic distribution and chemically controlled surface-mediated kinetics. Marginal analysis revealed the optimal operating ratio to be within the 100:25–100:35 ratio interval. The integrated Environmental Efficiency Index of 66.28% clearly shows that both acidity and mineral activation are achieved. The statistically validated and mechanistically consistent performance of the phosphorite waste clearly shows that it can be used as a sustainable alternative for the treatment of acidic industrial wastewater. Neutralization CaO enrichment adsorption kinetics phosphorite waste Full Text Additional Declarations No competing interests reported. Supplementary Files Graph1and2.opju graph3.opju graph4.opju formula.cdx 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. 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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-9065790","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":605342757,"identity":"43cf6b9a-fb52-4d33-84f3-37c16a70660d","order_by":0,"name":"Sanjarbek 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In this study, the feasibility of using Central Kyzylkum phosphorite waste as a sustainable mineral-based neutralizing agent was investigated under controlled batch conditions (333 K, 30 min). The experimental data revealed an increase in pH from 4.10 to 7.30, which corresponds to a neutralization efficiency of 78.05%, and an increase in CaO content from 23.92% to 36.96% (54.51% enrichment). Linear regression analysis (CaO\u0026thinsp;=\u0026thinsp;3.4665\u0026middot;pH\u0026thinsp;+\u0026thinsp;9.7852; R\u0026sup2; = 0.911; F\u0026thinsp;=\u0026thinsp;51.18; RMSE\u0026thinsp;=\u0026thinsp;1.07%) revealed the strong statistical correlation between acidity stabilization and calcium activation. Residual analysis showed homoscedastic distribution and chemically controlled surface-mediated kinetics. Marginal analysis revealed the optimal operating ratio to be within the 100:25\u0026ndash;100:35 ratio interval. 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