Analysis and Prognosis of the Aqueous Migration of Arsenic Based on Complex Study of Ogosta River Valley’s Hydrogeological Elements (at Specific Floodplain Site)

Gerginov, Peter; Antonov, Dimitar; Benderev, Aleksey; Stoyanova, V.; Kotsev, Tsvetan

doi:10.7546/crabs.2020.10.10

Cited by 9 publications

(5 citation statements)

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“…The applied approach has been approbated in past studies evaluating the risk of pollution in the area of Kozlodui NPP, uranium deposit Momino, Ogosta River valley, etc. (Stoyanov, 2012(Stoyanov, , 2019Stoyanov et al, 2018;Gerginov et al, 2020). The calculation scheme takes into account the processes of convection, reversible and irreversible elimination (sorption-desorption, ion exchange, precipitation and decay), dispersion, diffusion and mixing.…”

Section: Methodology and Tools For Assessment Of Groundwater Pollution In The River Terracementioning

confidence: 99%

Groundwater pollution in the Mesta River terrace caused by Eleshnitsa tailings pond – current status

Stoyanov¹,

Dimovski²,

Kolev³

2021

Rev. Bulg. Geol. Soc.

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Even after the implementation of eco-protective measures, the Eleshnitsa tailings pond continues to contaminate the Quaternary aquifer, formed in the alluvial deposits of Mesta River. A three-dimensional model of mass transport of selected key pollutants is developed on the basis of hydrochemical studies, geophysical surveys, and processing and systematization of monitoring data. The spread and degree of contamination in the Quaternary aquifer are estimated.

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Section: Methodology and Tools For Assessment Of Groundwater Pollution In The River Terracementioning

confidence: 99%

Groundwater pollution in the Mesta River terrace caused by Eleshnitsa tailings pond – current status

Stoyanov¹,

Dimovski²,

Kolev³

2021

Rev. Bulg. Geol. Soc.

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“…Предложениhttps://doi.org/10.52215/rev.bgs. 2023.84.3.311 ят методичен подход е успешно апробиран и в други подобни изследвания при моделиране на миграцията на замърсители от различни повърхностни източници (Benderev et al, 2015;Antonov et al, 2018;Stoyanov, 2018;Gerginov et al, 2020;Stoyanov, Dimovski, 2021).…”

Section: въведениеunclassified

Model based impact assessment on groundwater vulnerability during aggregate quarry operation

Stoyanov

2023

Rev. Bulg. Geol. Soc.

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A general methodological approach is proposed for the preliminary assessment of the potential impact on groundwater during the operation of quarries for aggregates. The practical application and effectiveness of this approach are by using a numerical model to predict groundwater and soil contamination during the implementation of a project in the region of Breznik, Western Bulgaria. The spread of highly mobile pollutants in both the unsaturated and saturated zones of the rock complex is simulated after emergency spills and prolonged discharges of contaminated water in the quarry area. The forecast is made for a period of 100 years. The numerical model was compiled using the VS2DI program.

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“…The sources, mechanisms of pollution, and their effect on the environment (soils, groundwater, etc.) are the subject of intensive research [38][39][40]. The average content of As in the waters of the Ogosta dam is 42-45 mg/L.…”

Section: Introductionmentioning

confidence: 99%

Efficiency of Modified Natural Clinoptilolite Tuff for As(III) and As(V) Uptake from Model Polluted Water

Stanimirova,

Karadjova

2023

Processes

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Granular and powdery clinoptilolite tuff samples from Beli Plast, Eastern Rhodopes, Bulgaria, were coated with metal hydroxides (Fe, Al, Fe-Mg) by two-step alkalization. The prepared sorbents were tested for As(III) and As(V) uptake from a modeled water solution with an arsenic concentration of 44 μg/L. The granular sorbent was used in the sorption columns and showed a high efficiency of arsenic purification from slightly polluted waters. The calculated maximum sorption capacity for the optimal conditions is 32.9 μg/g. The adsorption proceeds according to the Langmuir model. The mechanism of adsorption is most likely inner-sphere complexation. The sorbents’ complete regeneration was achieved by NaOH treatment. The results of the experiments show good possibilities for obtaining water with an arsenic concentration ranging from below the limit of detection to 3.8 µg/L, which is a significantly lower value than the permitted value of 10 μg/L and close to the national environmental quality standard for shallow waters. The high efficiency shows Fe- or Mg,Fe-coated clinoptilolite sorbents. The sorbents are highly efficient in purifying 400 liters of water with an initial concentration of 44 mg/L of either arsenate or arsenite per 1 kilogram of sorbent at a rate of 2.4–2.0 L/h/kg. The powdered sorbents used in a batch system under “static” conditions showed a much higher adsorption capacity than the granular one. Such sorbents are more suitable for small quantities of water with a high concentration of arsenic.

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Analysis and Prognosis of the Aqueous Migration of Arsenic Based on Complex Study of Ogosta River Valley’s Hydrogeological Elements (at Specific Floodplain Site)

Cited by 9 publications

References 0 publications

Groundwater pollution in the Mesta River terrace caused by Eleshnitsa tailings pond – current status

Groundwater pollution in the Mesta River terrace caused by Eleshnitsa tailings pond – current status

Model based impact assessment on groundwater vulnerability during aggregate quarry operation

Efficiency of Modified Natural Clinoptilolite Tuff for As(III) and As(V) Uptake from Model Polluted Water

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