Correlations of natural radionuclides in soil with those in sediment from the Danube and nearby irrigation channels

Krmar, M.; Varga, E.; Slivka, J.

doi:10.1016/j.jenvrad.2011.12.023

Cited by 18 publications

(5 citation statements)

References 15 publications

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“…The specific levels of natural radionuclides are mostly related to the type of rock or soil from which the sediments originates (Krmar et al, 2013). 238 U, 232 Th, 226 Ra and 40 K all have very long half-lives ( 226 Ra has the shortest half-life of 1600 years), which means the variation of activity concentrations in the sediment can only be caused by different material inputs and migrations of radioelements after deposition.…”

Section: Associations Between Radionuclides and Geochemical Variablesmentioning

confidence: 99%

Environmental evolution records reflected by radionuclides in the sediment of coastal wetlands: A case study in the Yellow River Estuary wetland

Wang

Song

et al. 2016

Journal of Environmental Radioactivity

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Section: Associations Between Radionuclides and Geochemical Variablesmentioning

confidence: 99%

Environmental evolution records reflected by radionuclides in the sediment of coastal wetlands: A case study in the Yellow River Estuary wetland

Wang

Song

et al. 2016

Journal of Environmental Radioactivity

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“…Two hundred gram each of the grounded samples were sealed in air tight plastic containers to avoid the escape of 222 Ra and 220 Rn and were stored for more than 4 weeks before measurement so as to attain secular equilibrium. [12] Gamma spectrometric measurements were made with a low-background Pb shielded 760 mm × 760 mm NaI (Tl) detector (Model 802 series by Bicron) optically coupled to a photomultiplier tube. The detector is interfaced with a Canberra series 10 plus multi-channelled analyzer (model: 1104).…”

Section: Methodsmentioning

confidence: 99%

Radiological health assessment of natural radioactivity in the vicinity of Obajana cement factory, North Central Nigeria

2015

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Measurements of activity concentrations of natural radionuclides in and around Obajana cement factory, North Central Nigeria have been carried out in this study to determine the activity levels of natural radionuclides in different environmental matrices in order to assess the radiological health hazards associated with the use of these matrices by the local population. A low-background Pb-shielded gamma spectroscopic counting assembly utilizing NaI (Tl) detector was employed for the measurements. The results show that sediment samples have the highest activity concentrations of all the radionuclides relative to soil, farmland soil, and rock samples. The radium equivalent activity and indoor gamma dose rates together with the corresponding annual effective indoor doses evaluated were found to be lower than their permissible limits. It suffices to say, that contrary to age-long fear of radiation risks to the population in the vicinity of the cement factory, no excessive radiological health hazards either indoors and/or outdoors is envisaged. Therefore, the environmental matrices around the factory could be used without any restrictions.

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“…Hotspot analysis, which is generally used to identify the spatial clustering patterns of regional hotspots and cold spots, has been more and more widely used in studies related to ESPs, and thus hotspot analysis was utilized to recognize the spatial distribution patterns of hotspots within the study area (Li et al, 2022; Mtshawu et al, 2023). Taking these small patches as research objects, taking their geographic centers, and using their areas as weights for hotspot analysis, hotspots can be identified when the z ‐value is >1.96 (95% confidence level) (Li et al, 2022).…”

Section: Esps Identification Frameworkmentioning

confidence: 99%

Optimization strategies of ecological security patterns through importance of ecosystem services and ecological sensitivity—A case study in the Yellow River Basin

Wei,

Liu,

et al. 2023

Land Degrad Dev

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With the aggravation of environmental conflicts, exploring the green development path is an inevitable choice to alleviate land tension, guarantee the harmony of human–land relations, and promote coordinated regional development. The Yellow River Basin (YRB) is an important national ecological barrier area, but the impact of its environmental problems can no longer be ignored. Ecological security patterns (ESPs) provide remarkable means for the identification, configuration, and optimization of ecological spaces, which can help people identify the most central zone that needs to be protected. In this paper, we proposed environmental optimization strategies applicable to YRB as a case area. Firstly, the basic framework of ESPs was constructed based on the “three‐step” method, where ecological sources were delineated by importance/sensitivity, resistance surfaces were created by entropy weight method, and the distribution ranges of ecological corridors, nodes, and barriers were confirmed by circuit theory. Meanwhile, stepping stones were introduced to optimize the ESPs, which were obtained through hotspot analysis and buffer analysis. The results displayed that (1) ecological sources covered an area of 166,699.32 km2, occupying 21% of the basin area. They were widely distributed in the upper and middle junctions, southeast and east of the basin, and of the land types that make up them, cropland, woodland, and grassland account for 97.6%. (2) The spatial distribution of resistance values varied considerably with low values predominantly found along water systems and high values predominantly found in densely populated urban areas. (3) Through the Linkage Mapper tool, 344 ecological corridors were acquired, with dense and short corridors in the southeast and sparse and long corridors in the northwest; 146 ecological nodes were acquired, which were the priority areas for ecological protection; and 154 barriers were acquired, the improvement or removal of which can enhance the connectivity between sources. In addition, the application of stepping stones further enhanced the connectivity between landscapes. The ESPs assessment framework constructed in this paper can provide strong support for relevant departments to carry out ecological monitoring and formulate environmental protection strategies.

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Correlations of natural radionuclides in soil with those in sediment from the Danube and nearby irrigation channels

Cited by 18 publications

References 15 publications

Environmental evolution records reflected by radionuclides in the sediment of coastal wetlands: A case study in the Yellow River Estuary wetland

Environmental evolution records reflected by radionuclides in the sediment of coastal wetlands: A case study in the Yellow River Estuary wetland

Radiological health assessment of natural radioactivity in the vicinity of Obajana cement factory, North Central Nigeria

Optimization strategies of ecological security patterns through importance of ecosystem services and ecological sensitivity—A case study in the Yellow River Basin

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