The Role of Microbiological Processes in the Formation of Geochemical Barriers and Redox Zones under Conditions of Contamination of Soils and Aquifers with Metals Near MSW Disposal Sites

Putilina, V. S.; Yuganova, T. I.

doi:10.1134/s0097807822080103

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…Reactive barriers are the most effective and least resource-consuming solution [16]. One variant of reactive barriers is microbiological, which involves injecting inexpensive soluble substrates to activate the indigenous microbial community [17][18][19]. The latter is most effective for the removal of nitrogen compounds, as well as uranium, organic contaminants and other elements.…”

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

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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.

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