| DOI: | 10.2172/1241908
|
| 报告号: | DOE-BARN--1111-1
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| 报告题名: | Linking AS, SE, V, and MN Behavior to Natural Biostimulated Uranium Cycling |
| 作者: | Keimowitz, Alison; Ranville, James; Mailloux, Brian; Figueroa, Linda
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| 出版年: | 2016
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| 发表日期: | 2016-03-16
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| 总页数: | 5
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| 国家: | 美国
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| 语种: | 英语
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| 英文关键词: | Arsenic
; thioarsenic
; uranium
; IFRC Rifle
; remediation
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| 中文主题词: | 碳
; 有机碳
; 含水层
|
| 主题词: | CARBON
; ORGANIC CARBON
; AQUIFERS
|
| 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. |
| URL: | http://www.osti.gov/scitech/servlets/purl/1241908
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| Citation statistics: |
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| 资源类型: | 研究报告
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/42198
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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| 1241908.pdf（167KB） | 研究报告 | -- | 开放获取 | | View
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| Recommended Citation: | |
Keimowitz, Alison,Ranville, James,Mailloux, Brian,et al. Linking AS, SE, V, and MN Behavior to Natural Biostimulated Uranium Cycling. 2016-01-01.
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