Radioactive wastes from near-surface storage facility of uranium conversion production

Nalivaiko, K. A.; Skripchenko, S. Yu.; Titova, S. M.; Semenishchev, V. S.

doi:10.1007/s10967-023-08912-6

Cited by 5 publications

(4 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This supports the same conclusion about the importance of the process of alkalinization in the reduction of nitrate. In earlier research [44,45], we found organotrophic denitrifying bacteria belonging to the genera Pseudomonas, Arthrobacter and others in groundwater in the sludge storage areas at the ChMP. It is also important to note the role of microbial biofilm in element accumulation and further mineral formation, which is formed on rocks after several days of microorganism development [55,56].…”

Section: Discussionmentioning

confidence: 73%

“…Previously, we analysed the microbial diversity of several groundwater samples with different levels of pollution. It was found that groundwater contains a physiologically diverse microbial community dominated by nitrogen cycle microorganisms, including denitrifying, nitrifying and anammox bacteria [44,45]. In the samples with high levels of ammonium, nitrate and sulfate pollution, bacteria of the genera Rhizobiaceae, Moraxellaceae, Oxalobacteraceae, Corynebacteriaceae, Xanthomonadaceae, Rhodobacteraceae, Alcaligenaceae and Pseudomonadaceae, capable of reducing nitrate, were found.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Authigenic Mineral Formation in Aquifers near the Uranium Sludge Storage Facility of Chepetsky Mechanical Plant during the Formation of a Biogeochemical Barrier in a Laboratory and Field Experiment

Artemiev,

Safonov

2023

Minerals

View full text Add to dashboard Cite

In this work, authigenic microbial mineral formation in groundwater near the uranium sludge storage at SC Chepetsky Mechanical Plant (ChMP) (Glazov, Russia) was analysed in field and laboratory experiments using thermodynamic modelling when the microbial community was activated by a mixture of acetate, glucose and whey. It was found that the mineral basis of the barrier consisted of aggregated soil particles with freshly deposited phases of carbonate and sulphide minerals of different degrees of crystallinity. An important factor in the formation of calcium phases is microbial denitrification, which is accompanied by an increase in pH values of the medium. The main factors of uranium immobilisation in the biogeochemical barrier were revealed, including its reduction to insoluble forms of uranium dioxide, adsorption on ferrous and sulphide-ferrous minerals, as well as the formation of phosphate phases through the addition of phosphorus-containing whey and co-precipitation or co-crystallisation in calcite phases.

show abstract

Section: Discussionmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Authigenic Mineral Formation in Aquifers near the Uranium Sludge Storage Facility of Chepetsky Mechanical Plant during the Formation of a Biogeochemical Barrier in a Laboratory and Field Experiment

Artemiev,

Safonov

2023

Minerals

View full text Add to dashboard Cite

show abstract

“…This is a flatland bulk storage with a natural watertight seal of 3.0 m thick alluvial loam intercalated with sandy loam, sand, and peat. At present, the tailing pond has been partially deactivated (out of operation from 2008 to 2016) [27]. Host rocks contain the alluvial Middle, Upper Pleistocene, and Holocene undivided sediments.…”

Section: Geological Hydrogeological and Hydrogeochemical Characterist...mentioning

confidence: 99%

“…The total thickness of the deposits is 10-15 m. The first aquifer is from 3 to 6 m thick and comprises sandy and gravel-pebble alluvial deposits; it recharges by the infiltration of atmospheric precipitation and groundwater coming from the elevated northeastern margin. The groundwater flows in the sludge storage site in the northeast direction, the drainage trench located north of the repository is the disposal area, and the groundwater close to the trench flows in the western direction towards the Cheptsa River, the regional discharge area [27].…”

Section: Geological Hydrogeological and Hydrogeochemical Characterist...mentioning

confidence: 99%

Biogeochemical In Situ Barriers in the Aquifers near Uranium Sludge Storages

Boguslavsky,

Shvartseva,

Popova

et al. 2023

Water

View full text Add to dashboard Cite

The long-term operation of uranium sludge storages causes serious problems: it contaminates the neighboring aquifers with dangerous substances (uranium, nitrate, ammonium, and sulfate). To purify the aquifers can be costly and time-consuming; therefore, it is important to use the potential of in situ conditions, e.g., the aboriginal microflora and its ability to biologically remediate water reservoirs. In this work, we study the geological, geochemical, and microbiological characteristics of groundwater contaminated by uranium sludge storages resulting from the production cycles of four Russian chemical plants. All of the sites under consideration were extremely contaminated with nitrate (up to 15 g/L); in each case, we used denitrifying bacteria as a dominant group of microorganisms for purification. Our laboratory studies showed that microbial stimulation of water samples by milk whey promotes O2 and nitrate removal; this, in turn, started the cycle of anaerobic processes of authigenic precipitation caused by the reduction of iron and sulfate in the system. Thus, a mineral geochemical barrier preventing uranium immobilization formed. As a result, the uranium of the liquid phase decreased about 92–98% after 3–6 months (decomposition time depends on the nitrate concentration in the groundwater probe). The resulting amorphous biogenic phases contain sulfur, iron, phosphorus, and uranium.

show abstract

A comparative study of sorption of microamounts of Ra, Po, U, Th, Np and Pa by a thin-layer sorbent based on manganese dioxide

Semenishchev,

Ishimbaeva,

Rogozhnikov

et al. 2023

J Radioanal Nucl Chem

View full text Add to dashboard Cite

Radioactive wastes from near-surface storage facility of uranium conversion production

Cited by 5 publications

References 40 publications

Authigenic Mineral Formation in Aquifers near the Uranium Sludge Storage Facility of Chepetsky Mechanical Plant during the Formation of a Biogeochemical Barrier in a Laboratory and Field Experiment

Authigenic Mineral Formation in Aquifers near the Uranium Sludge Storage Facility of Chepetsky Mechanical Plant during the Formation of a Biogeochemical Barrier in a Laboratory and Field Experiment

Biogeochemical In Situ Barriers in the Aquifers near Uranium Sludge Storages

A comparative study of sorption of microamounts of Ra, Po, U, Th, Np and Pa by a thin-layer sorbent based on manganese dioxide

Contact Info

Product

Resources

About