Risk of colloidal and pseudo-colloidal transport of actinides in nitrate contaminated groundwater near a radioactive waste repository after bioremediation

Авторы: Safonov Alexey, Lavrinovich Elena, Emel’yanov Alexander, Boldyrev Kirill, Kuryakov Vladimir, Rodygina Natalia, Zakharova Elena, Novikov Alexander
Журнал: Scientific reports
Том: 12
Номер: 1
Год издания: 2022
Издательство: Nature Publishing Group
Местоположение издательства: United Kingdom
Номер статьи: 4557
DOI: 10.1038/s41598-022-08593-3
Аннотация: The possible role of biogeochemical processes in the transport of colloidal and pseudo-colloidalU, Np, and Pu during bioremediation of radionuclide- and nitrate-contaminated groundwater wasinvestigated. In two laboratory experiments with water samples taken from contaminated aquifersbefore and post bioremediation, we found that microbial processes could cause clayed, ferruginous,and actinide colloids to coagulate. The main mechanisms are biogenic insoluble ferrous iron speciesformations (goethite, pyrrhotite, siderite, troilite, and ferrihydrite), the aggregation of clay particlesby microbial metabolites, and the immobilization of actinides in the bacterial cells, large polymers,and iron and clayed sediments. This process decreases the risk of colloidal and pseudo-colloidaltransport of actinides.
Добавил в систему: Сафонов Алексей Владимирович

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