Linking AS, SE, V, and MN Behavior to Natural Biostimulated Uranium Cycling

doi:10.2172/1241908

GSTDTAP > 地球科学

DOI	10.2172/1241908
报告编号	DOE-BARN--1111-1
来源ID	OSTI ID: 1241908
	Linking AS, SE, V, and MN Behavior to Natural Biostimulated Uranium Cycling
	Keimowitz, Alison; Ranville, James; Mailloux, Brian; Figueroa, Linda
	2016-03-16
出版年	2016
页数	5
语种	英语
国家	美国
领域	地球科学
英文摘要	The project âLinking As, Se, V, and Mn behavior to Natural and Biostimulated Uranium Cyclingâ successfully investigated Arsenic cycling the Rifle Colorado IFRC. This project trained undergraduate and graduate students at the Colorado School of Mines, Vassar College, and Barnard College. This resulted in both undergraduate theses and a PhD thesis and multiple publications. The science was highly successful and we were able to test the main hypotheses. We have shown that (H1) under reducing conditions that promote uranium immobilization arsenic is readily mobilized, that (H2) thioarsenic species are abundant during this mobilization, and (H3) we have examined arsenic mobilization for site sediment. At the Rifle IFRC Acetate was added during experiments to immobilize Uranium. These experiments successfully immobilized uranium but unfortunately would mobilize arsenic. We developed robust sampling and analysis methods for thioarsenic species. We showed that the mobilization occurred under sulfate reducing conditions and the majority of the arsenic was in the form of thioarsenic species. Previous studies had predicted the presence of thioarsenic species but this study used robust field and laboratory methods to quantitatively determine the presence of thioarsenic species. During stimulation in wells with high arsenic the primary species were trithioarsenate and dithioarsenate. In wells with low levels of arsenic release thioarsenates were absent or minor components. Fortunately after the injection of acetate ended the aquifer would become less reducing and the arsenic concentrations would decrease to pre-injection levels. In aquifers where organic carbon is being added as a remedial method or as a contaminant the transient mobility of arsenic during sulfidogenesis should be considered especially in sulfate rich aquifers as this could impact downgradient water quality.
英文关键词	Arsenic thioarsenic uranium IFRC Rifle remediation
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来源平台	US Department of Energy (DOE)
引用统计
文献类型	科技报告
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/7296
专题	地球科学
推荐引用方式 GB/T 7714	Keimowitz, Alison,Ranville, James,Mailloux, Brian,et al. Linking AS, SE, V, and MN Behavior to Natural Biostimulated Uranium Cycling,2016.