A predictive assessment of the uranium ore tailings impact on surface water contamination: Case study of the city of Kamianske, Ukraine

Rudakov, Dmytro; Pikarenia, Dmytro; Orlinska, Olha; Rudakov, L. I.; Hapich, H

doi:10.1016/j.jenvrad.2023.107246

Cited by 6 publications

(5 citation statements)

References 31 publications

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“…Deforge et al (2021) notes that the natural radioactive background is exceeded by two times at a range of 250-300 meters from the location of the dumps and even at a range of 1500 meters from the dumps. Similar observations were noted by scientists for both spontaneous and organised storage of radioactive materials (Rudakov et al, 2023;Heracleous et al, 2024). The data presented in (Wan et al, 2024) indicate the spread of radioactive particles over long distances and in concentrations significantly exceeding background values.…”

Section: Introductionsupporting

confidence: 81%

“…An example of radioactive materials storage is the tailings storage facility "Dniprovske" (the city of Kamianske, Ukraine), where about 5,85*10 6 m 3 of hazardous waste was accumulated in 1954-1968 on an area of about 76 ha in the floodplain of the Dnipro river. The lack of an adequate waterproof screen under the tailing pit and earthen dam leads to constant flooding of radioactive materials, their leaching and migration in groundwater to the nearest small river Konoplyanka (Rudakov et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

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Geoinformation modeling of radioactive contamination of territories on the example of mines of the “ShidGSK” mining and processing plant

Neposhyvailenko,

Gulyaev,

Gritsan

et al. 2024

Biosys. divers.

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The aim of the study was to model the territorial distribution and statistical assessment of migration through the trophic chain of naturally occurring radionuclides released into the environment as a result of uranium ore mining. Statistical, geoinformation and experimental research methods were used in the study. Interpolation of the results of volumetric activity of natural radionuclides in environmental components and development of spatial models of their territorial distribution were performed using the ArcGIS software; statistical processing of modelling results and development of mathematical models of migration of natural radionuclides between environmental components were performed using ArcGIS Geostatistical Analyst software. The paper substantiates the choice of the method of geostatistical modelling of the territorial distribution of volumetric activity of natural radionuclides 234U, 238U, 210Po, 210Pb, 226Ra in soils and plants, which allows modelling the values of probabilistic indicators of radioecological contamination in the absence of a sufficient array of initial actual research results. Based on the analysis of the data obtained, the methodology of mathematical modelling of migration of natural radionuclides between soil and plant parts was further developed, which will facilitate consideration of the specifics of migration of natural radionuclides through the trophic chain and help in determining the level of radioecological hazard to the environment. The developed territorial models allow one to obtain stochastic data for their further analytical processing and visualizing radioecological hazard zones. Based on the developed models, zones of increased radioecological hazard within the existing sources of radioactive contamination were identified.

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Section: Introductionsupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Geoinformation modeling of radioactive contamination of territories on the example of mines of the “ShidGSK” mining and processing plant

Neposhyvailenko,

Gulyaev,

Gritsan

et al. 2024

Biosys. divers.

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“…Samples weighing 5 kg each were taken from two sources. The first sample was taken from dumps that have been covering the tailings storage facility of the Prydniprovsk Chemical Plant for a long time [23]. The second sample is "fresh" phosphogypsuma waste of current production.…”

Section: Research Materials and Methodsmentioning

confidence: 99%

Utilization of phosphogypsum from industrial dumps as an element of environmentally safe energy- and resource-conserving technologies

Pikarenia,

Orlinska,

Hapich

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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The paper discusses the problem of disposal and processing of phosphogypsum dumps as an element of environmentally safe energy- and resource-conserving technologies. The process of impact and possibility of phosphogypsum pre-treatment with weak electric fields to improve its physical and mechanical properties was studied. Two samples of different origin phosphogypsum, which are located in dumps on the territory of the Kamianske City (Ukraine), were used as research material. The research was conducted on samples of the following fractions: 1.0–2.0, 0.4–1.0, 0.1–0.4 mm. Further, balls were formed from the treated phosphogypsum and raw materials to study their compressive strength. The experiment was performed on a pellet strength meter, which operates in the range of 0–2.5 kgf/grain. Phosphogypsum balls, treated with electric current, did not collapse with the maximum values of the device. According to the research results, it was established that preliminary treatment with a low electric current leads to a decrease in the dehydration temperature of phosphogypsum, and the subsequent hydration allows to obtain a material with higher compressive strength properties. This substantiates the potential possibility of involving research results to obtain a cheaper product and will allow to liquidate multi-ton deposits of phosphogypsum.

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“…Currently, the tailing pond surface is a drainless catch basin of atmospheric precipitation seeping through phosphogypsum and watering RAW. The polluted water is discharged by means of filtration through the protective dam body and base in surface and underground water [17], [18].…”

Section: Figure 1 Areal Scheme Of the Dniprovske Tailing Pond Locatio...mentioning

confidence: 99%

Analyzing stability of protective structures as the elements of geotechnical tailing pond safety

Tymoshchuk,

Rudakov,

Pikarenia

et al. 2023

Min. miner. depos.

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Purpose is the assessment of soil retaining wall stability to ensure geotechnical safety during the radioactive waste tailing pond closure and further recultivation (or rehabilitation) in Kamianske town (Ukraine). Methods. Geomechanical stability of the protective structure has been assessed relying upon the analysis of geological-hydrogeological, engineering-geological, and geotechnical conditions of the certain tailing pond area using a deformation elastic-plastic model of a medium implemented on the basis of finite-element method. For the purpose, the dam slopes have been detalized taking into consideration their geometry as well as changes in vertical section of rock material characteristics in accordance with the earlier geophysical studies; exploration drilling; and engineering-geological surveys. Findings. Stability coefficients of protective tailing pond dam have been identified within the typical areas of a hydraulic structure; it provides high reliability and representativeness of the whole structure health in time as well as under various conditions of the industrial waste water saturation. It has been defined that the stability coefficients varies from ks = 1.372 to 4.758. Comparison of the indicators between 2022 and 2016 demonstrates a tendency of the slope stability coefficient decrease due to water saturation and groundwater level rise. Nevertheless, design characteristics of the structure make it possible to ensure satisfactory a stability coefficient along the whole dam length being 1.13 times higher than the standard one (i.e. ks = 1.250). Originality. The dependence of the tailing pond protective dam stability upon a water supply degree at the forecasted groundwater level rise at the expense of atmospheric and melt water ingress to the tailing pond has been defined. The danger of complete radioactive waste water saturation is a significant reduction in the stability coefficient of the protective structure, which can be supported by predictive modelling data. If strength parameters of a dam material decline for the most critical area then the strength coefficient decreases starting from 1.532 in terms of the current groundwater level down to 1.372 as for the forecasted dam water supply. The figure is more than 10% of its initial stability. Practical implications. The obtained results substantiate the necessity; moreover, they are of practical value while improving hydrological, hydrogeological, and geotechnical monitoring of the analyzed tailing pond to ensure its radiation safety under different conditions of further behaviour during closure, recultivation, or rehabilitation.

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A predictive assessment of the uranium ore tailings impact on surface water contamination: Case study of the city of Kamianske, Ukraine

Cited by 6 publications

References 31 publications

Geoinformation modeling of radioactive contamination of territories on the example of mines of the “ShidGSK” mining and processing plant

Geoinformation modeling of radioactive contamination of territories on the example of mines of the “ShidGSK” mining and processing plant

Utilization of phosphogypsum from industrial dumps as an element of environmentally safe energy- and resource-conserving technologies

Analyzing stability of protective structures as the elements of geotechnical tailing pond safety

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