20.500.12556/DKUM-92028 Cu(II) and Ni(II) adsorption on torrefied wood waste biomass The aim of the research was to study the torrefaction processes of wood biomass, compare the product characteristics at different torrefaction temperatures, and assess both moisture adsorption on raw and torrefied samples, as well as metal (Cu(II) and Ni(II)) adsorption on torrefied biomass. The novelty of the research was to investigate whether the presence of adsorbed metals in torrefied biomass significantly affects the energetic properties of the torrefied biomass, compared to torrefied biomass without metals. First, wood samples were torrefied at temperatures of 250 °C, 350 °C, and 400 °C. Following torrefaction, thermogravimetric analysis (TGA) was performed to evaluate mass loss and thermal stability. Next, changes in surface functional groups were examined, and higher heating values (HHV) were measured to assess the energy content. The results showed that torrefaction significantly increased the hydrophobicity of the biomass, leading to reduced moisture adsorption and enhanced material properties. Additionally, the adsorption of Cu(II) and Ni(II) ions on torrefied biomass was investigated. The results showed that the adsorption efficiency for Cu(II) was higher, reaching 62.4%, compared to Ni(II) at 21.2%. The adsorption process followed a pseudo-second-order kinetic model, which indicated that chemisorption was the dominant mechanism. adsorption torrefication nitrogen atmosphere metals adsorpcija torefikacija nitrogen atmosfera kovine true false true MDPI AG Angleški jezik Slovenski jezik https://www.mdpi.com/journal/metals © 2025 by the authors Članek v reviji 2025-03-12 11:29:17 2025-03-12 11:29:18 2026-01-08 12:20:10 0000-00-00 00:00:00 2025 0 0 15 str. iss. 3, [article no.] 304 Vol. 15 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2025-01-23 2025-03-08 2025-03-11 66 228692227 10.3390/met15030304 2075-4701 metals-15-00304.pdf metals-15-00304.pdf 1 69C911AC4213F21C7065BAF4A5628A90 b34f6d9cf220d3351b465f97672abd77e67521b06a13a3e30e971c1b6236aa86 226c68f0-ff2d-11ef-9eb9-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=189198 https://www.mdpi.com/2075-4701/15/3/304 0 fe1a734f-ec83-11f0-a4e9-00155d580e02 https://dk.um.si/Dokument.php?lang=slv&id=201834 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0