Assessment of Ecotoxic Metal Leaching Behaviour of Coal Gangue using a Sequential Extraction Procedure

Assessment of Ecotoxic Metal Leaching Behaviour of Coal Gangue using a Sequential Extraction Procedure | 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 Assessment of Ecotoxic Metal Leaching Behaviour of Coal Gangue using a Sequential Extraction Procedure William Nash, Reza Fahmi, Violeta Ramos, Rich Crane This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4518250/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 13 Mar, 2025 Read the published version in Mine Water and the Environment → Version 1 posted 5 You are reading this latest preprint version Abstract The environmental leaching characteristics of the ecotoxic metals Cr, Co, Ni, Cu, Zn, As, Se, Ag, Cd, Tl and Pb within six coal gangue samples from mines located in Poland are assessed herein using the BCR-2 sequential extraction procedure. The samples’ bulk mineralogical and chemical compositions are determined by petrographic examination, X-ray fluorescence spectroscopy, X-ray diffraction and inductively-coupled mass spectrometry (following acid digestion). In general, of the metals studied Cd (predominantly oxidizable but often exchangeable) and Pb (predominantly reducible) pose the greatest hazard to the environment. Ni (predominantly oxidizable) and Cr (predominantly reducible) are also highly abundant and potentially mobile. Zn and Cu are abundant and predominantly exchangeable in half of the samples examined. Leaching of all metals is likely to be accelerated by the samples’ acid-forming propensity, which arises from their considerable (though variable) inventories of framboidal pyrite. This is especially the case for the wastes from Bogdanka and Piast mines, since they possess an order of magnitude more sulfidic material than the other samples (up to 1.9 wt%). Management of repositories containing these wastes will require specific measures to prevent such acid generation and ecotoxic metal release into the environment. Specifically, encapsulation within acid-neutralizing (e.g. calcite-bearing) materials is essential for these wastes, but is also recommended for those from mines Jankowice, Marcel, Staszik and Chwalowice. coal waste sequential extraction metals leaching environment Full Text Supplementary Files 20240525SupplementaryInformation.docx Cite Share Download PDF Status: Published Journal Publication published 13 Mar, 2025 Read the published version in Mine Water and the Environment → Version 1 posted Editorial decision: Minor Revisions Needed 23 Jul, 2024 Reviewers agreed at journal 05 Jun, 2024 Reviewers invited by journal 05 Jun, 2024 Editor assigned by journal 04 Jun, 2024 First submitted to journal 02 Jun, 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-4518250","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":311037803,"identity":"14492b41-166a-4d80-b825-fccb6e2dd4fc","order_by":0,"name":"William 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The samples\u0026rsquo; bulk mineralogical and chemical compositions are determined by petrographic examination, X-ray fluorescence spectroscopy, X-ray diffraction and inductively-coupled mass spectrometry (following acid digestion). In general, of the metals studied Cd (predominantly oxidizable but often exchangeable) and Pb (predominantly reducible) pose the greatest hazard to the environment. Ni (predominantly oxidizable) and Cr (predominantly reducible) are also highly abundant and potentially mobile. Zn and Cu are abundant and predominantly exchangeable in half of the samples examined. Leaching of all metals is likely to be accelerated by the samples\u0026rsquo; acid-forming propensity, which arises from their considerable (though variable) inventories of framboidal pyrite. This is especially the case for the wastes from Bogdanka and Piast mines, since they possess an order of magnitude more sulfidic material than the other samples (up to 1.9 wt%). 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