التفاصيل البيبلوغرافية
| العنوان: |
Field Application of238U/235U Measurements to Detect Reoxidation and Mobilization of U(IV) |
| المؤلفون: |
Jemison, NE, Shiel, AE, Johnson, TM, Lundstrom, CC, Long, PE, Williams, KH |
| المصدر: |
Jemison, NE; Shiel, AE; Johnson, TM; Lundstrom, CC; Long, PE; & Williams, KH. (2018). Field Application of238U/235U Measurements to Detect Reoxidation and Mobilization of U(IV). Environmental Science and Technology, 52(6), 3422-3430. doi: 10.1021/acs.est.7b05162. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/0sb8m148 |
| بيانات النشر: |
eScholarship, University of California, 2018. |
| سنة النشر: |
2018 |
| الوصف: |
© 2018 American Chemical Society. Biostimulation to induce reduction of soluble U(VI) to relatively immobile U(IV) is an effective strategy for decreasing aqueous U(VI) concentrations in contaminated groundwater systems. If oxidation of U(IV) occurs following the biostimulation phase, U(VI) concentrations increase, challenging the long-term effectiveness of this technique. However, detecting U(IV) oxidation through dissolved U concentrations alone can prove difficult in locations with few groundwater wells to track the addition of U to a mass of groundwater. We propose the238U/235U ratio of aqueous U as an independent, reliable tracer of U(IV) remobilization via oxidation or mobilization of colloids. Reduction of U(VI) produces238U-enriched U(IV), whereas remobilization of solid U(IV) should not induce isotopic fractionation. The incorporation of remobilized U(IV) with a high238U/235U ratio into the aqueous U(VI) pool produces an increase in238U/235U of aqueous U(VI). During several injections of nitrate to induce U(IV) oxidation,238U/235U consistently increased, suggesting238U/235U is broadly applicable for detecting mobilization of U(IV). |
| وصف الملف: |
application/pdf |
| اللغة: |
English |
| URL الوصول: |
https://explore.openaire.eu/search/publication?articleId=od_______325::ead26b186bd2107b04557338828bb7b1
http://www.escholarship.org/uc/item/0sb8m148 |
| حقوق: |
OPEN |
| رقم الأكسشن: |
edsair.od.......325..ead26b186bd2107b04557338828bb7b1 |
| قاعدة البيانات: |
OpenAIRE |
