TY - JOUR AU - Sager, M AU - Wiche, O TI - Rare Earth elements (REE) : origins, dispersion, and environmental implications — a comprehensive review JF - ENVIRONMENTS J2 - ENVIRONMENTS VL - 11 PY - 2024 IS - 2 SN - 2076-3298 DO - 10.3390/environments11020024 UR - https://m2.mtmt.hu/api/publication/34534010 ID - 34534010 AB - The rare earth elements (REE) comprise a group of 16 chemically very similar elements that occur widespread in rocks, soils, and water bodies, share similar ionic radii to the essential element Ca2+, and consequently also occur in biota. Given that REE form mainly trivalent cations, they also share similarities to Al3+. Compared to their chemical cognate Ca, they have a higher reactivity. Thus, their accumulation in soils may constitute a severe environmental threat. Over the last decades, the increasing use of REE in modern technology and fertilizers raised concerns about the pollution of soils and water bodies, which led to a rapidly increasing number of publications dealing with REE toxicity to plants, animals and humans, the fate of REE in soil–plant systems, REE cycling in ecosystems and impacts of REE pollution on food security. This review aims to give an overview of the current knowledge on the occurrence of REE in the total environment, including relevant environmental processes governing their mobility, chemical speciation and transfer from abiotic compartments into biota. Beginning with an overview of analytical approaches, we summarize the current knowledge on the ecology of REE in the lithosphere, pedosphere, hydrosphere and biosphere, including impacts of soil pollution on food security and public health. LA - English DB - MTMT ER - TY - JOUR AU - Szabó, Judit Alexandra AU - Keller, Boglárka AU - Centeri, Csaba AU - Hatvani, István Gábor AU - Kovács, J AU - Szalai, Zoltán AU - Jakab, Gergely Imre TI - Varying particle size selectivity of soil erosion along a cultivated catena JF - OPEN GEOSCIENCES J2 - OPEN GEOSCI VL - 15 PY - 2023 IS - 1 PG - 11 SN - 2391-5447 DO - 10.1515/geo-2022-0585 UR - https://m2.mtmt.hu/api/publication/34449165 ID - 34449165 AB - Sheet erosion is a complex multi-factor-dependent process with high spatial heterogeneity on hillslopes. Although the individual factors have been well studied, their aggregated effect on size-selective erosional processes is highly uncertain. Therefore, this study concentrates on the aggregate size distribution and effective particle size distribution (PSD) of the aggregates in the soil loss, collected from different simulated hillslope positions and surface conditions. These simulated hillslope positions combine moisture content from the extremely dry to the saturated with related slope positions of 2, 5, and 12% steepness and different surface roughness (tilled and crusted surfaces) modelled in a laboratory rainfall simulator. Using hierarchical cluster analysis, the PSD of the aggregates was separated into three groups based on the differences in the 59–116 µm range of the PSD histograms, namely, macro-aggregates, 50–250 µm sized micro-aggregates, and <50 µm sized fractions were classified into distinct groups, although some micro-aggregate samples were classified into the macro-aggregate group. PSDs from the 50–250 µm aggregate size fraction were clustered into a group of macro-aggregates if the PSD changed with time (during the rainfall event), notably on rough surfaces. The role of the specified size range in the classification is believed to be due to the parallel presence of aggregates and single particles in this range. As aggregates have a lower density than mineral particles, they tend to be enriched in soil loss under low-energy runoff conditions. Moreover, all samples in the <50 µm fraction clustered into the macro-aggregate group were eroded from the smooth/crusted surface, probably due to the presence of larger particles. The results indicate that the combined effect of erosional factors is not apparent, and the impact of the crust and extreme moisture content on the selectivity and size distribution of the sediment requires further investigation. LA - English DB - MTMT ER - TY - JOUR AU - Wang, L AU - Wu, W AU - Ni, Sh AU - Wang, J AU - Cai, Ch TI - Quantitative characterization of the turnover path of red soil aggregate in the splash process JF - TRANSACTIONS OF THE CHINESE SOCIETY OF AGRICULTURAL ENGINEERING / NONGYE GONGCHENG XUEBAO J2 - TRANSACT CHIN SOC AGRICULT ENG VL - 38 PY - 2022 IS - 8 SP - 115 EP - 123 PG - 9 SN - 1002-6819 DO - 10.11975/j.issn.1002-6819.2022.08.014 UR - https://m2.mtmt.hu/api/publication/33539490 ID - 33539490 LA - Chinese DB - MTMT ER - TY - JOUR AU - Szabó, Judit Alexandra AU - Centeri, Csaba AU - Keller, Boglárka AU - Hatvani, István Gábor AU - Szalai, Zoltán AU - Dobos, Endre AU - Jakab, Gergely Imre TI - The use of various rainfall simulators in the determination of the driving forces of changes in sediment concentration and clay enrichment JF - WATER J2 - WATER-SUI VL - 12 PY - 2020 IS - 10 PG - 17 SN - 2073-4441 DO - 10.3390/w12102856 UR - https://m2.mtmt.hu/api/publication/31629323 ID - 31629323 N1 - Geographical Institute, Research Centre for Astronomy and Earth Sciences, Budapest, 1112, Hungary Department of Nature Conservation and Landscape Ecology, Faculty of Agricultural and Environmental Sciences, Szent István University, Gödöllő, 2100, Hungary Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, Budapest, 1112, Hungary Institute of Geography and Geoinformatics, University of Miskolc, Miskolc, 3515, Hungary Department of Environmental and Landscape Geography, ELTE University, Budapest, 1117, Hungary Export Date: 25 October 2020 Correspondence Address: Jakab, G.; Geographical Institute, Research Centre for Astronomy and Earth SciencesHungary; email: jakab.gergely@csfk.mta.hu Geographical Institute, Research Centre for Astronomy and Earth Sciences, Budapest, 1112, Hungary Department of Nature Conservation and Landscape Ecology, Faculty of Agricultural and Environmental Sciences, Szent István University, Gödöllő, 2100, Hungary Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, Budapest, 1112, Hungary Institute of Geography and Geoinformatics, University of Miskolc, Miskolc, 3515, Hungary Department of Environmental and Landscape Geography, ELTE University, Budapest, 1117, Hungary Export Date: 26 October 2020 Correspondence Address: Jakab, G.; Geographical Institute, Research Centre for Astronomy and Earth SciencesHungary; email: jakab.gergely@csfk.mta.hu LA - English DB - MTMT ER -