H31I-1557
Impact of Electron Donor selection on In-situ Biosequestration of Uranium
Wednesday, 16 December 2015
Poster Hall (Moscone South)
SayyedHassan Tabatabaei1,2, Hua Zhong3, Diana Ivana Gutierrez3, Jim Field4 and Mark L Brusseau5, (1)University of Arizona, Soil, Water, and Environmental Science Department, Tucson, AZ, United States, (2)Shahrekord University, Department of Water Engineering, Shahrekord, Iran, (3)University of Arizona, Tucson, AZ, United States, (4)The University of Arizona, Department of Chemical and Environmental Engineering, Tucson, AZ, United States, (5)University of Arizona, Soil, Water, and Environmental Science Department and Hydrology and Water Resource Department, Tucson, AZ, United States
Abstract:
In-situ biosequestration, wherein electron-donating substrates are injected to promote microbial-associated sequestration of contaminants, is one promising enhanced-attenuation technique for remediation of groundwater containing arsenic, uranium, selenium, and similar constituents. A pilot-scale test of in-situ biosequestration for uranium in groundwater is in process at a former uranium mining site in Monument Valley, Arizona. Complementary bench experiments were conducted to examine the impact of different electron donors on the effectiveness of biosequestration. Aqueous and sediment samples were collected before and after the injection for monitoring changes in sediment properties, mineral geochemical composition, microbial community composition, and microbial activity.
