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| DOI | 10.1016/j.jhazmat.2011.04.022 |
| Modeling uranium transport in acidic contaminated groundwater with base addition | |
| Zhang, Fan; Luo, Wensui; Parker, Jack C.; Brook, Scott C.; Watson, David B.; Jardine, Philip M.; Gu, Baohua | |
| 通讯作者 | Zhang, F (通讯作者) |
| 发表日期 | 2011 |
| ISSN | 0304-3894 |
| EISSN | 1873-3336 |
| 起始页码 | 863 |
| 结束页码 | 868 |
| 卷号 | 190期号:1-3 |
| 英文摘要 | This study investigates reactive transport modeling in a column of uranium(VI)-contaminated sediments with base additions in the circulating influent. The groundwater and sediment exhibit oxic conditions with low pH, high concentrations of NO3-, SO42-. U and various metal cations. Preliminary batch experiments indicate that additions of strong base induce rapid immobilization of U for this material. In the column experiment that is the focus of the present study, effluent groundwater was titrated with NaOH solution in an inflow reservoir before reinjection to gradually increase the solution pH in the column. An equilibrium hydrolysis, precipitation and ion exchange reaction model developed through simulation of the preliminary batch titration experiments predicted faster reduction of aqueous Al than observed in the column experiment. The model was therefore modified to consider reaction kinetics for the precipitation and dissolution processes which are the major mechanism for Al immobilization. The combined kinetic and equilibrium reaction model adequately described variations in pH, aqueous concentrations of metal cations (Al, Ca, Mg, Sr, Mn, Ni, Co), sulfate and U(VI). The experimental and modeling results indicate that U(VI) can be effectively sequestered with controlled base addition due to sorption by slowly precipitated Al with pH-dependent surface charge. The model may prove useful to predict field-scale U(VI) sequestration and remediation effectiveness. (C) 2011 Elsevier B.V. All rights reserved. |
| 关键词 | IN-SITU BIOREDUCTIONADSORPTIONTITRATIONPRECIPITATIONTECHNETIUMALUMINUMAQUIFERU(VI) |
| 英文关键词 | Uranium; Sequestration; Transport; pH; Modeling |
| 语种 | 英语 |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology |
| WOS类目 | Engineering, Environmental ; Environmental Sciences |
| WOS记录号 | WOS:000292427800111 |
| 来源期刊 | JOURNAL OF HAZARDOUS MATERIALS
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| 来源机构 | 中国科学院青藏高原研究所 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/257946 |
| 推荐引用方式 GB/T 7714 | Zhang, Fan,Luo, Wensui,Parker, Jack C.,et al. Modeling uranium transport in acidic contaminated groundwater with base addition[J]. 中国科学院青藏高原研究所,2011,190(1-3). |
| APA | Zhang, Fan.,Luo, Wensui.,Parker, Jack C..,Brook, Scott C..,Watson, David B..,...&Gu, Baohua.(2011).Modeling uranium transport in acidic contaminated groundwater with base addition.JOURNAL OF HAZARDOUS MATERIALS,190(1-3). |
| MLA | Zhang, Fan,et al."Modeling uranium transport in acidic contaminated groundwater with base addition".JOURNAL OF HAZARDOUS MATERIALS 190.1-3(2011). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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