REE-bearing minerals in Drava river sediments, Slovenia, and their potential origin

Šoster, Aleš; Zavašnik, Janez; Ravnjak, Mihael; Herlec, Uroš

doi:10.5474/geologija.2017.018

Cited by 8 publications

(2 citation statements)

References 22 publications

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“…The town of Maribor developed on the Drava River alluvial plain, which is represented by Quaternary glacio-fluvial and fluvial sediments, consisting mainly of metamorphic and igneous rock fragments (Mencin Gale et al, 2019;Mioč & Žnidarčič, 1989;Šoster et al, 2017;Trajanova, 2002;Žlebnik, 1982). The surroundings of the town are dominated by the hilly area of Slovenske Gorice, consisting of Miocene sedimentary rocks (mainly siliciclastic rocks), and by the Pohorje and Kozjak Mountains, consisting of a variety of metamorphic and igneous rocks (Hinterlechner Ravnik, 1971;Mioč, 1978;Mioč & Žnidarčič, 1989;Zupančič, 1994).…”

Section: Study Areamentioning

confidence: 99%

Oral bioaccessibility of potentially toxic elements in various urban environmental media

Gaberšek,

Gosar

2024

Environ Geochem Health

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An important aspect of geochemical studies is determining health hazard of potentially toxic elements (PTEs). Key information on PTEs behaviour in the human body in case of their ingestion is provided with the use of in vitro bioaccessibility tests. We analysed and compared oral bioaccessibility of a wide range of PTEs (As, Cd, Ce, Cr, Cu, Hg, La, Li, Ni, Pb, Sb, Sn, Zn), including some that are not often studied but might pose a human health hazard, in soil, attic dust, street dust, and household dust, using Unified BARGE Method (UBM). Additionally, feasibility of usage of scanning electron microscope techniques in analyses of solid residuals of UBM phases was tested. Results show that bioaccessible fractions (BAFs) of PTEs vary significantly between individual samples of the same medium, between different media and between the gastric and gastro-intestinal phases. In soil, attic dust and street dust, bioaccessibility of individual PTE is mostly higher in gastric than in gastro-intestinal phase. The opposite is true for PTEs in household dust. In all four media, with the exception of Pb in household dust, among the most bioaccessible PTEs in gastric phase are Cd, Cu, Pb, and Zn. During the transition from the stomach to small intestine, the mean BAFs of most elements in soil, attic dust, and street dust decreases. The most bioaccessible PTEs in gastro-intestinal phase are Cu, Cd, Ni, and As. Micromorphological and chemical characterisation at individual particle level before and after bioaccessibility test contribute significantly to the understanding of oral bioaccessibility.

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Section: Study Areamentioning

confidence: 99%

Oral bioaccessibility of potentially toxic elements in various urban environmental media

Gaberšek,

Gosar

2024

Environ Geochem Health

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“…joining Drava near Lienz, and Möll with its source near Heiligenblutt below Großglockner (3798 m a.s.l.) [27]. According to Bermanec et al [28] the region of Hoche Tauern is considered to be the source of gold found in fluvial sediments of river Drava from Maribor in Slovenia downstream.…”

Section: Study Areamentioning

confidence: 99%

Groundwater Recharge Assessment Using Multi Component Analysis: Case Study at the NW Edge of the Varaždin Alluvial Aquifer, Croatia

Karlović

Marković

Vujnović

2021

Water

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Exploring the interaction between precipitation, surface water, and groundwater has been a key subject of many studies dealing with water quality management. The Varaždin aquifer is an example of an area where high nitrate content in groundwater raised public concern, so it is important to understand the aquifer recharge for proper management and preservation of groundwater quality. The NW part of the Varaždin aquifer has been selected for study area, as precipitation, Drava River, accumulation lake, and groundwater interact in this area. In this study, groundwater and surface water levels, water temperature, water isotopes (2H and 18O), and chloride (Cl−) were monitored in precipitation, surface water, and groundwater during the four-year period to estimate groundwater recharge. Head contour maps were constructed based on the groundwater and surface water levels. The results show that aquifer is recharged from both Drava River and accumulation lake for all hydrological conditions–low, mean, and high groundwater levels. The monitoring results of water temperature, chloride content, and stable water isotopes were used as tracers, i.e. as an input to the mixing model for estimation of the contribution ratio from each recharge source. The calculation of mixing proportions showed that surface water is a key mechanism of groundwater recharge in the study area, with a contribution ratio ranging from 55% to 100% depending on the proximity of the observation well to surface water.

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Stabilization of river dredged sediments by means of alkali activation technology

Bizjak,

Žibret,

Božič

et al. 2024

J Soils Sediments

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Purpose Alkali activation process has been applied to fresh river clay-rich sediments in order to increase their mechanical properties and make them suitable for soil stabilization. Materials and methods Dredged sediments were mixed with up to 30 mass percent (ma%) of fly ash (FA) or ladle slag (LS) and after curing for 3 days at 60 °C, the bending and compressive strength have been determined. The mixtures which exhibited the highest strengths were further optimized for being used in soil stabilization. For this purpose, the sediment was stabilized with 4 ma% of quicklime (QL) and after 1 h 30 ma% of FA with alkali activator was added and cured for 1, 7 and 28 days. Results The stabilized sediment has a significantely better geomechanical performance in comparison with the sediment alone. Stabilizing the dredged sediment using alkali activation technology provides high enough strengths to eventually make it suitable for anti-flood embankments. Conclusions The results confirmed the suitability of the investigated technology for soil stabilization.

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REE-bearing minerals in Drava river sediments, Slovenia, and their potential origin

Cited by 8 publications

References 22 publications

Oral bioaccessibility of potentially toxic elements in various urban environmental media

Oral bioaccessibility of potentially toxic elements in various urban environmental media

Groundwater Recharge Assessment Using Multi Component Analysis: Case Study at the NW Edge of the Varaždin Alluvial Aquifer, Croatia

Stabilization of river dredged sediments by means of alkali activation technology

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