Uranium (U) accumulation in organic soils is a common phenomenon that can lead to high U concentration in montane wetlands. The stability of the immobilized U in natural wetlands following redox fluctuations and re-oxidation events, however, is not currently known. In this study, we investigated a saturated histosol that had accumulated up to 6000 ppm of U at 30 cm below ground level (bgl). Uranium in the waters feeding the wetland originates from the weathering of surrounding gneiss rocks, a process releasing trace amounts (<3 ppb) of soluble U into nearby streams. Redox oscillations in the first 20 cm bgl led to the accumulation of U, Ca, S in low permeability layers at 30 and 45 cm bgl. XRF measurements along the core showed that U st...
Discharge from former uranium mining and milling areas is world wide a source of elevated uranium co...
Almost 10% of wells in the USA tested through the USGS National Water-Quality Assessment program pro...
Uranium scavenging in soils and sediments located downstream from former U mines is expected to natu...
Understanding the hydro-biogeochemical conditions that impact the mobility of uranium (U) in natural...
International audienceUnderstanding the controls on uranium (U) mobility in the environment is key t...
Very high concentrations of uranium (up to 4000 ppm) were found in a natural soil in the Dischma val...
International audienceReduction of uranium (VI) to low soluble uranium (IV) species in wetlands is e...
Biogeochemistry of uranium in wetlands plays important roles in U immobilization in storage ponds of...
Wetlands often act as sinks for uranium and other trace elements. Our previous work at a mining-impa...
Tetravalent uranium is commonly assumed to form insoluble species, resulting in the immobilization o...
Uranium (U) is a common contaminant in alluvial aquifer systems all over the world. U in the environ...
Discharge from former uranium mining and milling areas is world wide a source of elevated uranium co...
Almost 10% of wells in the USA tested through the USGS National Water-Quality Assessment program pro...
Uranium scavenging in soils and sediments located downstream from former U mines is expected to natu...
Understanding the hydro-biogeochemical conditions that impact the mobility of uranium (U) in natural...
International audienceUnderstanding the controls on uranium (U) mobility in the environment is key t...
Very high concentrations of uranium (up to 4000 ppm) were found in a natural soil in the Dischma val...
International audienceReduction of uranium (VI) to low soluble uranium (IV) species in wetlands is e...
Biogeochemistry of uranium in wetlands plays important roles in U immobilization in storage ponds of...
Wetlands often act as sinks for uranium and other trace elements. Our previous work at a mining-impa...
Tetravalent uranium is commonly assumed to form insoluble species, resulting in the immobilization o...
Uranium (U) is a common contaminant in alluvial aquifer systems all over the world. U in the environ...
Discharge from former uranium mining and milling areas is world wide a source of elevated uranium co...
Almost 10% of wells in the USA tested through the USGS National Water-Quality Assessment program pro...
Uranium scavenging in soils and sediments located downstream from former U mines is expected to natu...