Risk of colloidal and pseudo-colloidal transport of actinides in nitrate contaminated groundwater near a radioactive waste repository after bioremediation
The possible role of biogeochemical processes in the transport of colloidal and pseudo-colloidal U, Np, and Pu during bioremediation of radionuclide- and nitrate-contaminated groundwater was investigated. In two laboratory experiments with water samples taken from contaminated aquifers before 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 species formations (goethite, pyrrhotite, siderite, troilite, and ferrihydrite), the aggregation of clay particles by 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-colloidal transport of actinides.
Citations by journals
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Biology
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Biology
2 publications, 25%
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Water Research
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Water Research
1 publication, 12.5%
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Nanoscale Advances
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Nanoscale Advances
1 publication, 12.5%
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Critical Reviews in Biotechnology
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Critical Reviews in Biotechnology
1 publication, 12.5%
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Hydrology
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Hydrology
1 publication, 12.5%
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Water (Switzerland)
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Water (Switzerland)
1 publication, 12.5%
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Minerals
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Minerals
1 publication, 12.5%
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2
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Citations by publishers
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5
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Multidisciplinary Digital Publishing Institute (MDPI)
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Multidisciplinary Digital Publishing Institute (MDPI)
5 publications, 62.5%
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Elsevier
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Elsevier
1 publication, 12.5%
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Royal Society of Chemistry (RSC)
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Royal Society of Chemistry (RSC)
1 publication, 12.5%
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Taylor & Francis
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Taylor & Francis
1 publication, 12.5%
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