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Uranium Mill Tailings: Geochemistry, Mineralogy, and Environmental Impact
Worldwide, the mining of uranium has generated 938 × 10 6 m 3 of mill tailings. The radioactivity of these tailings depends on the grade of ore mined and varies from less than 1 Bq/g to more than 100Expand
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Reduction of U(VI) to U(IV) by indigenous bacteria in contaminated ground water
Abstract We report on bio-catalyzed reduction and immobilization of U(VI) species (0.25 mg/l to 235 mg/l) in ground water in the presence of high concentrations of nitrate, sulfate and carbonate. WeExpand
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Biological reduction of uranium in groundwater and subsurface soil.
Biological reduction of uranium is one of the techniques currently studied for in situ remediation of groundwater and subsurface soil. We investigated U(VI) reduction in groundwaters and soils ofExpand
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Chloride and organic chlorine in forest soils: storage, residence times, and influence of ecological conditions.
Recent studies have shown that extensive chlorination of natural organic matter significantly affects chlorine (Cl) residence time in soils. This natural biogeochemical process must be consideredExpand
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Oxidative dissolution of uraninite precipitated on Navajo sandstone
Abstract Column and batch experiments were conducted with sandstone and ground water samples to investigate oxidation of uraninite precipitated by microbially mediated reduction of U(VI), aExpand
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Chemical reactions of uranium in ground water at a mill tailings site
We studied soil and ground water samples from the tailings disposal site near Tuba City, AZ, located on Navajo sandstone, in terms of uranium adsorption and precipitation. The uranium concentrationExpand
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Microbial reduction of 99Tc in organic matter-rich soils.
For safety assessment purposes, it is necessary to study the mobility of long-lived radionuclides in the geosphere and the biosphere. Within this framework, we studied the behaviour of (99)Tc inExpand
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Occurrence of natural organic chlorine in soils for different land uses
Consideration of natural formation of organochlorine compounds in soils is necessary in radioecology in order to understand chlorine radioisotope (36Cl) cycling in various environments for safetyExpand
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Corrosion of carbon steel under sequential aerobic–anaerobic environmental conditions
We investigated sequential aerobic and anaerobic microbiologically induced corrosion of carbon steel to simulate deep geological disposal conditions. Under limited oxygen supply, lepidocrocite andExpand
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Precipitation of technetium by subsurface sulfate-reducing bacteria
Summary To study the interaction between Tc and subsurface bacteria, we conducted batch experiments with soil and groundwater or sterilized deionized water. The system water/soil was amended withExpand
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