20.500.12556/DiRROS-25200 Sequestration capacity of bio-based ashes and influence of carbonation on the leaching behavior depending on their mineralogical composition Mineral CO2 sequestration is a promising carbon capture and storage approach based on the chemical reaction of CO2 with alkaline materials containing Ca- and Mg-rich (hydr)oxides and silicates. This results in the formation of relatively insoluble and storable carbonates. This study investigates six ashes of different origins and chemical compositions to assess their CO2 sequestration potential and leaching behavior, offering insights into their environmental impact and potential risks. The carbonation experiments were conducted under controlled laboratory conditions and the CO2 sequestration capacity was quantified using a pressure calcimeter, supported by thermogravimetric analysis. Wood ashes and ash from the co-combustion of biomass from a paper mill showed the highest carbonation potential, with CO2 sequestration capacities between 344.8 and 432.3 g CO2 per kg of ash and carbonation efficiencies between 82.4 % and 94.4 %. In addition to the high sequestration capacity of the ashes, carbonation was found to affect the leaching behavior of the ash in the environment by changing its mineralogical composition. The process consistently reduced pH and generally decreased the leaching of certain trace elements, except for Mo, and Cr. Nevertheless, the reduction in the leachability of several elements suggests a partial environmental benefit of carbonation. The findings highlight the dual functionality of the carbonation: it provides a viable route for the permanent binding of CO2 and can enhance the stabilization of industrial residues. However, the persistence of metal leaching indicates that its overall effectiveness in mitigating environmental risks associated with residue disposal or reuse remains material-dependent. enforced carbonation maximum sequestration capacity leaching heavy metals mineralogy bio-based ash prisilna karbonatizacija maksimalna zmogljivost sekvestracije izluževanje težke kovine mineralogija pepel iz biomase true false true Elsevier Angleški jezik Slovenski jezik © 2025 The Authors Neznano 2026-01-13 14:09:42 2026-01-13 14:23:35 2026-01-14 03:53:45 0000-00-00 00:00:00 2025 0 0 str. 65512-65523 Vol. 51, Issue 30, Part C Dec. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2025-11-17 54 1873-3956 10.1016/j.ceramint.2025.11.229 258501635 https://doi.org/10.1016/j.ceramint.2025.11.229 1 222edca1-f081-11f0-94a7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=38006 http://hdl.handle.net/20.500.12556/DiRROS-23902 0 22eb4576-f081-11f0-94a7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=38007 RAZ_Tominc_Sara_2025.pdf RAZ_Tominc_Sara_2025.pdf 1 3868F91F2038D116D58932CA539B8D04 a7b7d90411198ed9c1b2b2d5646b56b66963a514ea5b17fd91bcba4c13fdfc08 f51a139d-f082-11f0-94a7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=38008 Zavod za gradbeništvo Slovenije Dataset for the article Sequestration capacity of bio-based ashes and influence of carbonation on the leaching behavior depending on their mineralogical composition 0 0 0