The microbial impact on U, Pu, Np, and Am immobilization on aquifer sandy rocks, collected at the deep LRW injection site

Safonov, Alexey; Popova, N. N.; Boldyrev, Kirill; Lavrinovich, E. A.; Боева, Н. М.; Artemiev, Grigori; Kuzovkina, E. V.; Emel’yanov, A. M.; Myasnikov, Ivan Yu.; Zakharova, Еlena V.; Новиков, А. П.

doi:10.1016/j.gexplo.2022.107052

Cited by 12 publications

(12 citation statements)

References 53 publications

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“…It should be noted that, in addition to the removal of nitrogen, biofouling of mineral carriers in the permeable barrier system is important for the immobilization of metals in cases of multicomponent contamination. Thus, biofouling of rocks in aquifers leads to an increase in the immobilization of actinides [ 103 ], and biofouling of zeolite leads to an increase in the efficiency of the immobilization of heavy metals [ 5 , 104 ].…”

Section: Discussionmentioning

confidence: 99%

Effect of Mineral Carriers on Biofilm Formation and Nitrogen Removal Activity by an Indigenous Anammox Community from Cold Groundwater Ecosystem Alone and Bioaugmented with Biomass from a “Warm” Anammox Reactor

Vishnyakova

Popova

Artemiev

et al. 2022

Biology

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The complex pollution of aquifers by reduced and oxidized nitrogen compounds is currently considered one of the urgent environmental problems that require non-standard solutions. This work was a laboratory-scale trial to show the feasibility of using various mineral carriers to create a permeable in situ barrier in cold (10 °C) aquifers with extremely high nitrogen pollution and inhabited by the Candidatus Scalindua-dominated indigenous anammox community. It has been established that for the removal of ammonium and nitrite in situ due to the predominant contribution of the anammox process, quartz, kaolin clays of the Kantatsky and Kamalinsky deposits, bentonite clay of the Berezovsky deposit, and zeolite of the Kholinsky deposit can be used as components of the permeable barrier. Biofouling of natural loams from a contaminated aquifer can also occur under favorable conditions. It has been suggested that the anammox activity is determined by a number of factors, including the presence of the essential trace elements in the carrier and the surface morphology. However, one of the most important factors is competition with other microbial groups that can develop on the surface of the carrier at a faster rate. For this reason, carriers with a high specific surface area and containing the necessary microelements were overgrown with the most rapidly growing microorganisms. Bioaugmentation with a “warm” anammox community from a laboratory reactor dominated by Ca. Kuenenia improved nitrogen removal rates and biofilm formation on most of the mineral carriers, including bentonite clay of the Dinozavrovoye deposit, as well as loamy rock and zeolite-containing tripoli, in addition to carriers that perform best with the indigenous anammox community. The feasibility of coupled partial denitrification–anammox and the adaptation of a “warm” anammox community to low temperatures and hazardous components contained in polluted groundwater prior to bioaugmentation should be the scope of future research to enhance the anammox process in cold, nitrate-rich aquifers.

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Section: Discussionmentioning

confidence: 99%

Effect of Mineral Carriers on Biofilm Formation and Nitrogen Removal Activity by an Indigenous Anammox Community from Cold Groundwater Ecosystem Alone and Bioaugmented with Biomass from a “Warm” Anammox Reactor

Vishnyakova

Popova

Artemiev

et al. 2022

Biology

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“…Only dissimilative reduction of nitrate at its high concentrations can lead to the accumulation of nitrite, which is more toxic than nitrate and reduces or stops microbial processes [3]; 8. To form a stable biogeochemical barrier with reduced redox potential optimal for sulfate reduction and the formation of sulfide-ferriferous mineral phases, conditions of limited oxygen access to the aquifer are required [4].…”

Section: Future Work On the Formation Of Barriers In Situmentioning

confidence: 99%

In Situ Biogeochemical Barriers for Contaminated Groundwater Treatment near Uranium Sludge Storages

2023

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“…3–5 According to monitoring data, when actinides are released into subsurface aquifers, they interact with the host sandy rocks. 6…”

Section: Introductionmentioning

confidence: 99%

“…[3][4][5] According to monitoring data, when actinides are released into subsurface aquifers, they interact with the host sandy rocks. 6 In the natural environment, plutonium can exist in four oxidation states [Pu(III), Pu(IV), Pu(V), and Pu(VI)] simultaneously, with the groundwater environment being dominated by the Pu(IV) and Pu(V) valence states. 7 Previous studies have shown that Pu(IV) and Pu(V) can be separated by many environmentally relevant solid phases.…”

Section: Introductionmentioning

confidence: 99%

Adsorption and diffusion of actinyls on the basal gibbsite (001) surface: a theoretical perspective

Xie,

Shi,

Zhou

et al. 2023

Phys. Chem. Chem. Phys.

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The microbial impact on U, Pu, Np, and Am immobilization on aquifer sandy rocks, collected at the deep LRW injection site

Cited by 12 publications

References 53 publications

Effect of Mineral Carriers on Biofilm Formation and Nitrogen Removal Activity by an Indigenous Anammox Community from Cold Groundwater Ecosystem Alone and Bioaugmented with Biomass from a “Warm” Anammox Reactor

Effect of Mineral Carriers on Biofilm Formation and Nitrogen Removal Activity by an Indigenous Anammox Community from Cold Groundwater Ecosystem Alone and Bioaugmented with Biomass from a “Warm” Anammox Reactor

In Situ Biogeochemical Barriers for Contaminated Groundwater Treatment near Uranium Sludge Storages

Adsorption and diffusion of actinyls on the basal gibbsite (001) surface: a theoretical perspective

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