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1912. Recovery of phosphorus and metals from the ash of sewage sludge, municipal solid waste, or wood biomass : a review and proposals for further useSara Tominc, Vilma Ducman, Wolfgang Wisniewski, Terttu Luukkonen, Kirkelund Gunvor M., Ottosen Lisbeth M., 2023, original scientific article Abstract: This review provides an overview of methods to extract valuable resources from the ash fractions of sewage sludge, municipal solid waste, and wood biomass combustion. The resources addressed here include critical raw materials, such as phosphorus, base and precious metals, and rare earth elements for which it is increasingly important to tap into secondary sources in addition to the mining of primary raw materials. The extraction technologies prioritized in this review are based on recycled acids or excess renewable energy to achieve an optimum environmental profile for the extracted resources and provide benefits in the form of local industrial symbioses. The extraction methods cover all scarce and valuable chemical elements contained in the ashes above certain concentration limits. Another important part of this review is defining potential applications for the mineral residues remaining after extraction. Therefore, the aim of this review is to combine the knowledge of resource extraction technology from ashes with possible applications of mineral residues in construction and related sectors to fully close material cycle loops. Keywords: critical raw materials, extraction, sewage sludge ash, municipal solid waste incineration ash, wood biomass ash Published in DiRROS: 03.11.2023; Views: 494; Downloads: 192 Full text (1,12 MB) This document has many files! More... |
1913. Bolezni, škodljivci in sušni stres pri navadni bukvi v različnih scenarijih podnebnih sprememb (V4-2026) : končno poročilo2023, final research report Keywords: navadna bukev, gospodarjenje z gozdovi, hiranje, bolezni drevja, suša, škodljivci, podnebne spremembe, potencialna ogroženost, modeliranje, model naravne razširjenosti, poročila Published in DiRROS: 03.11.2023; Views: 457; Downloads: 136 Full text (6,45 MB) |
1914. Bolezni, škodljivci in sušni stres pri navadni bukvi v različnih scenarijih podnebnih sprememb (V4-2026) : Aktivnost 4.1: Priporočila in usmeritve za dolgoročno gospodarjenje z navadno bukvijo z vidika njenega zdravjaNikica Ogris, Maarten De Groot, Barbara Piškur, Marija Kolšek, 2023, treatise, preliminary study, study Keywords: navadna bukev, gospodarjenje, gozdnogospodarski načrt, usmeritev, strategija Published in DiRROS: 03.11.2023; Views: 438; Downloads: 159 Full text (294,07 KB) |
1915. Bolezni, škodljivci in sušni stres pri navadni bukvi v različnih scenarijih podnebnih sprememb (V4-2026) : Aktivnost 3.3: Potencialna razširjenost navadne bukve glede na različne scenarije podnebnih spremembNikica Ogris, 2023, treatise, preliminary study, study Keywords: potencialna razširjenost, navadna bukev, prognoza, napoved, model Published in DiRROS: 03.11.2023; Views: 477; Downloads: 121 Full text (4,18 MB) |
1916. Bolezni, škodljivci in sušni stres pri navadni bukvi v različnih scenarijih podnebnih sprememb (V4-2026) : Aktivnost 3.2: Vpliv bolezni in škodljivcev na hiranje bukveNikica Ogris, 2023, treatise, preliminary study, study Keywords: bolezni, škodljivci, poškodba dreves, napoved, model, varstveno-sanitarni posek Published in DiRROS: 03.11.2023; Views: 494; Downloads: 200 Full text (1,43 MB) |
1917. Bolezni, škodljivci in sušni stres pri navadni bukvi v različnih scenarijih podnebnih sprememb (V4-2026) : Aktivnost 3.1: Vpliv suše na hiranje bukveNikica Ogris, 2023, treatise, preliminary study, study Keywords: suša, osutost bukove krošnje, vodni primanjkljaj, model, napoved Published in DiRROS: 03.11.2023; Views: 451; Downloads: 137 Full text (600,36 KB) |
1918. Bolezni, škodljivci in sušni stres pri navadni bukvi v različnih scenarijih podnebnih sprememb (V4-2026) : Aktivnost 2.1: Vzroki hiranja navadne bukve v SlovenijiNikica Ogris, Andreja Kavčič, Janja Zajc, Ana Brglez, Maarten De Groot, Barbara Piškur, 2023, treatise, preliminary study, study Keywords: kompleksna bolezen, škodljiv dejavnik, hiranje, fakultativen patogen, endofit, sušni stres, stresni dejavniki Published in DiRROS: 03.11.2023; Views: 464; Downloads: 129 Full text (948,27 KB) |
1919. Effect of undercooling on clinopyroxene crystallization in a high K basalt : implications for magma dynamics at Stromboli volcanoF. Colle, Matteo Masotta, S. Costa, Silvio Mollo, P. Landi, A. Pontesilli, S. Peres, Lucia Mancini, 2023, original scientific article Abstract: We present undercooling (∆T) experiments aimed at investigating the effect of growth kinetics on the textural and compositional evolution of clinopyroxene crystals growing from a high-K basalt erupted during the 2003 paroxysm of Stromboli volcano (Italy). The experiments were performed at P = 350 MPa, T = 1050–1210 °C, H2Omelt = 0–3 wt%, and fO2 = Ni-NiO + 1.5 buffer. An initial stage of supersaturation was imposed to the melt under nominally anhydrous (∆Tanh = 10–150 °C) and hydrous (∆Thyd = 25–125 °C) conditions. Afterwards, this supersaturation state was mitigated by melt relaxation phenomena over an annealing time of 24 h. Results show that plagioclase is the liquidus mineral phase of the high-K basalt at ∆Tanh = 10 °C and dominates the phase assemblage as the degree of undercooling increases. Conversely, clinopyroxene and spinel co-saturate the melt at ∆Thyd = 25 °C, followed by the subordinate formation of plagioclase. At ∆Tanh/hyd ≤ 50 °C, the textural maturation of clinopyroxene produces polyhedral crystals with {−111} (hourglass) and {hk0} (prism) sectors typical of a layer-by-layer growth mechanism governed by an interface-controlled crystallization regime. At ∆Tanh/hyd ≥ 75 °C, the attainment of dendritic and skeletal morphologies testifies to the establishment of diffusion-limited reactions at the crystal-melt interface. 3D reconstructions of synchrotron radiation X-ray microtomographic data reveal a composite growth history for clinopyroxene crystals obtained at ∆Tanh/hyd ≥ 95 °C. The early stage of melt supersaturation produces rosette-like structures composed of dendritic branches of clinopyroxene radiating from a common spinel grain, which acts as surface for heterogeneous nucleation. As diffusive relaxation phenomena progress over the annealing time, the elongate dendrites that constitute the inner crystal domain are partially infilled by the melt and develop skeletal overgrowths in the outer domain. With the increasing degree of undercooling, TAl and M1Ti cations are progressively incorporated in the lattice site of clinopyroxene at the expense of TSi and M1Mg cations. Because of the effect of H2Omelt on the liquidus depression and melt depolymerization, crystals obtained at ∆Thyd are also more enriched in TAl and M1Ti and depleted in TSi and M1Mg than those growing at ∆Tanh. The emerging picture is that the morphological and geochemical evolution of clinopyroxene is mutually controlled by the combined effects of melt supersaturation and relaxation phenomena. A new empirical relationship based on the cation exchange reactions in the lattice site of clinopyroxene is finally proposed to estimate the degree of undercooling governing the crystallization of augitic phenocrysts erupted during normal and violent explosions at Stromboli. Keywords: clinopyroxene, undercooling, hourglass, crystallization, microtomography Published in DiRROS: 27.10.2023; Views: 560; Downloads: 316 Full text (6,46 MB) This document has many files! More... |
1920. Use of fly ash and phosphogypsum for the synthesis of belite-sulfoaluminate clinkerSabina Dolenec, Lea Žibret, Emilija Fidanchevska, V. Jovanov, Biljana Angjusheva, Vilma Ducman, 2019, original scientific article Abstract: Fly ash and phosphogypsum were used as Naturally Occurring Radioactive Materials (NORM) by-products for the synthesis of belite-sulfoaluminate clinkers. The influence of raw mixture composition and firing temperature was investigated. Clinkers and cements were examined by X-ray powder diffraction and scanning electron microscopy with energy dispersive X-ray spectroscopy. The compressive strength of the cements was determined after 28 days. Clinker phases identified included ye’elimite, ß-phase of belite, ternesite and gehlenite, while the main hydration product of the cement pastes was ettringite. The results showed that belite-sulfoaluminate cements can be fabricated with a compressive strength of 45.9 N/mm2 by firing the raw mixture (70 wt.% marl, 10 wt.% bauxite and 20 wt.% phosphogypsum) at a temperature of 1320°C/1h. Keywords: clinker, microstructure, fly ash, gypsum, calcium sulphoaluminate Published in DiRROS: 27.10.2023; Views: 465; Downloads: 183 Full text (2,01 MB) This document has many files! More... |