1. OBJECTIVE AND PERCEIVED ENVIRONMENTAL QUALITY IN THE TOWNS OF ZENICA AND MARIBOR : GROUP PROJECT FINAL REPORTIvana Pandža, Katja Belec, Matjaž Žvokelj, Merima Vrškić, Tajda Huber, Ula Urbas, 2020, elaborat, predštudija, študija Opis: In this study, we measured the concentrations of specific heavy metals in the soil and sediment samples taken on different locations of the cities of Maribor (Slovenia), and Zenica (Bosnia and Herzegovina). The report also includes a questionnaire regarding the residents’ views about the environmental quality of the city they live in. Ključne besede: Soil, sediments, heavy metals, AAS, pollution, questionnaire, environmental quality. Objavljeno v RUNG: 11.09.2020; Ogledov: 3658; Prenosov: 0 Gradivo ima več datotek! Več... |
2. Uranium bearing dissolved organic matter in the porewaters of uranium contaminated lake sedimentsBreda Novotnik, Wei Chen, R. Douglas Evans, 2018, izvirni znanstveni članek Opis: Uranium (U) mobility in the environment strongly depends on its oxidation state and the presence of complexing
agents such as inorganic carbon, phosphates, and dissolved organic matter (DOM). Despite the importance of
DOM in U mobility, the exact mechanism is still poorly understood. Therefore, the aim of our investigation was
to characterise sediment porewater DOM in two lakes in Ontario, Canada (Bow and Bentley Lakes) that were
historically contaminated with U and propose possible composition of UO2-bearing DOM. Depth profiles of U
concentrations in porewaters and total sediment digests reveal U levels of up to 1.3 mg L−1 in porewater and up
to 0.8 mg−1 g in sediment. Depth profiles of U did not correlate with Fe, Mn, SO4
2−, or Eh profiles. Therefore,
porewater DOM was analysed and taken into consideration as the primary source of U mobility. Porewater DOM
in each sediment section (1 cm sections, 20 cm core length) was analysed by high-resolution electrospray ionisation
mass spectrometry. PCA analyses of porewater DOM mass spectra showed grouping and clear separation
of DOM in sediment sections with elevated U concentrations in comparison to sections with background U
concentrations. Several criteria were set to characterise UO2-bearing DOM and more than 70 different molecules
were found. The vast majority of these UO2-DOM compounds fell in the category of carboxyl-containing aliphatic
molecules (H/C between 0.85 and 1.2 and O/C≤0.4) and had a mean value of m/z about 720. Ključne besede: Uranium
Lake sediments
Porewater
Disolved organic matter
High resolution mass spectrometry Objavljeno v RUNG: 09.10.2019; Ogledov: 4089; Prenosov: 0 Gradivo ima več datotek! Več... |
3. Optimization of DGT technique for determination of iron species in natural water and sediments by photothermal beam deflection spectroscopyHanna Budasheva, Arne Bratkič, Dorota Korte, Mladen Franko, 2018, objavljeni povzetek znanstvenega prispevka na konferenci Ključne besede: beam deflection spectroscopy, diffusive gradients in thin-film technique, iron redox species, photothermal techniques, natural water, sediments Objavljeno v RUNG: 23.11.2018; Ogledov: 4731; Prenosov: 0 Gradivo ima več datotek! Več... |
4. EVALUATION OF MARINE SEDIMENTS FROM THE PORT OF LUKA KOPER FROM THE ENVIRONMENTAL PERSPECTIVE AND IN TERMS OF THEIR USABILITY IN THE BRICK INDUSTRYPatrik Baksa, 2016, magistrsko delo Opis: The majority of the world’s goods are transported over water and dredging is essential for the development of harbors and ports. Therefore, the management of dredged material is a worldwide issue. Due to its chemical and petrographic, mineralogical and homogeneity composition, marine sediments are an appropriate raw material to use in the brick industry. Marine sediments can serve as raw material for the production of clay blocks, roofing and ceramic tiles.
Different analyses were carried out in order to determine if the dredged material from the Port of Koper is environmentally friendly and suitable to use in the brick industry. These analyses included: a chemical analysis, a mineralogical analysis, a particle size analysis and a chloride content (Cl-) analysis, and tests of firing in a gradient furnace. Furthermore, tests of mechanical properties, as well as tests of frost-resistance of the samples were carried out.
On the basis of primary analyses and samples prepared in a lab, it was established that marine sediments from the Port of Koper without any additives are only conditionally suitable as a source material for producing brick products. In collaboration with Gorica brickworks (Goriške opekarne), a pilot production from a mixture of 60% component B from Gorica brickworks and 40% component A (marine sediments) from the Port of Koper was prepared. Different tests showed the mixture could be appropriate for brick production. Ključne besede: marine sediments, recycling, clay bricks, chemical analysis, mechanical properties, brick production. Objavljeno v RUNG: 05.09.2016; Ogledov: 6877; Prenosov: 278 Celotno besedilo (3,30 MB) |
5. The impact of gravel extraction on hyporheic ecology: a case study of the Bača river (W Slovenia) : dissertationNataša Mori, 2008, doktorska disertacija Ključne besede: hyporheic invertebrate, Soča river, Bača river, hyporheic biota, benthic organisms, particulate organic matter, POM, fine sediment, ETS activity, electron transport system, sediments, Nematoda, Harpacticoida, Chironomidae, gravel extraction, environmental impact assessment Objavljeno v RUNG: 19.02.2015; Ogledov: 6185; Prenosov: 398 Celotno besedilo (1,14 MB) Gradivo ima več datotek! Več... |