Details

Autor(en) / Beteiligte

• Edayilam, Nimisha
• Ferguson, Brennan
• Montgomery, Dawn
• Al Mamun, Abdullah
• Martinez, Nicole
• Powell, Brian A
• Tharayil, Nishanth

Titel

Dissolution and Vertical Transport of Uranium from Stable Mineral Forms by Plants as Influenced by the Co-occurrence of Uranium with Phosphorus

Ist Teil von

• Environmental science & technology, 2020-06, Vol.54 (11), p.6602-6609

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Plants could mobilize (dissolution followed by vertical transport) uranium (U) from mineral forms that are otherwise stable. However, the variability of this plant-mediated mobilization of U as a function of the presence of various essential plant nutrients contained in these minerals remains unknown. A series of column experiments were conducted using to quantify the vertical transport of U from stable mineral forms as influenced by the chemical and physical coexistence of U with the essential nutrient, phosphorus (P). The presence of plants significantly increased the vertical migration of U only when U was precipitated with P (UO HPO ·4H O; chernikovite) but not from UO (uraninite) that lacks any essential plant nutrient. The U dissolution was further increased when chernikovite co-occurred with a sparingly available form of P (FePO ) under P-limited growing conditions. Similarly, accumulated the highest amount of U from chernikovite (0.05 mg/g) in the presence of FePO compared to that of uraninite (no-P) and chernikovite supplemented with KH PO These results signify an increased plant-mediated dissolution, uptake, and leaching of radioactive contaminants in soils that are nutrient deficient, a key factor that should be considered in management at legacy contamination sites.