20.500.12556/DiRROS-18142 Effect of demineralization and ball milling treatments on the properties of Arundo donax and olive stone-derived biochar The structural and physio-chemical properties of biochar are crucial to determining biochar’s quality and the adequate application. Specifically, the large porosity of biochar has been known as a favorable feature, especially for environmental remediation. In this regard, physical and chemical modifications have been used to improve biochar’s porosity which requires high-energy consumption and involves chemical agents. The objective of this study was to prepare biochar with developed porosity using mild treatments. Arundo donax and olive stone were demineralized by a water-washing method. Treated and non-treated biomasses were pyrolyzed, and part of the derived samples was subjected to wet ball milling. Samples were characterized with proximate, Fourier transform infrared, particle size, and physisorption analyses. The effect of demineralization depended on the biomass type, as ash reduction only influenced Arundo donax-derived biochar, which was attributed to the difference in initial ash content that was relatively low for olive stone. The carbonization yield decreased by 46% for the Arundo donax biomass after demineralization. Moreover, demineralization expanded the surface area and total pore volume of the Arundo donax biochar. The ball milling was effective in producing micro-sized biochar particles with a mean size ranging between 30 ± 2 µm and 42 ± 2 µm and between 13 ± 1 µm and 22 ± 2 µm for Arundo donax and olive stone without and with demineralization, respectively. Ball milling increased the surface area of non-demineralized Arundo donax by 47% and demineralized Arundo donax by 124%. Additionally, ball milling increased the surface area of non-demineralized olive stone by 65% and demineralized olive stone by 62%. biomass carbonisation porosity biomasa karbonizacija poroznost true false true Iranian Society of Environmentalists, Center for Environment and Energy Research and Studies Angleški jezik Slovenski jezik © The Author(s) 2023 Neznano 2024-02-13 07:59:36 2024-02-13 08:22:27 2024-02-14 03:49:53 0000-00-00 00:00:00 2024 0 0 str. 101-114 Vol. 21 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2023-05-17 604.4:662.6:579 1735-1472 10.1007/s13762-023-04968-9 153356547 https://doi.org/10.1007/s13762-023-04968-9 1 146591e7-ca35-11ee-aa6e-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=24648 https://link.springer.com/article/10.1007/s13762-023-04968-9 1 1349ac2f-ca35-11ee-aa6e-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=24647 RAZ_Zouari_Mariem_2024.pdf RAZ_Zouari_Mariem_2024.pdf 1 08986FCBE8B5C0043E39F80BD52BDBEA 0c493ee0bf5b9cd531afe7c69b2e50eff7a10143491594800f965dfada5f6563 3bbdf309-ca38-11ee-aa6e-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=24649 Zavod za gradbeništvo Slovenije 0 0 0