Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017WR020695 |
Modeling Transport of Cesium in Grimsel Granodiorite With Micrometer Scale Heterogeneities and Dynamic Update of K-d | |
Voutilainen, Mikko1; Kekalainen, Pekka1; Siitari-Kauppi, Marja1; Sardini, Paul2; Muuri, Eveliina1; Timonen, Jussi3; Martin, Andrew4 | |
2017-11-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | Finland; France; Switzerland |
英文摘要 | Transport and retardation of cesium in Grimsel granodiorite taking into account heterogeneity of mineral and pore structure was studied using rock samples overcored from an in situ diffusion test at the Grimsel Test Site. The field test was part of the Long-Term Diffusion (LTD) project designed to characterize retardation properties (diffusion and distribution coefficients) under in situ conditions. Results of the LTD experiment for cesium showed that in-diffusion profiles and spatial concentration distributions were strongly influenced by the heterogeneous pore structure and mineral distribution. In order to study the effect of heterogeneity on the in-diffusion profile and spatial concentration distribution, a Time Domain Random Walk (TDRW) method was applied along with a feature for modeling chemical sorption in geological materials. A heterogeneous mineral structure of Grimsel granodiorite was constructed using X-ray microcomputed tomography (X-CT) and the map was linked to previous results for mineral specific porosities and distribution coefficients (K-d) that were determined using C-14-PMMA autoradiography and batch sorption experiments, respectively. After this the heterogeneous structure contains information on local porosity and K-d in 3-D. It was found that the heterogeneity of the mineral structure on the micrometer scale affects significantly the diffusion and sorption of cesium in Grimsel granodiorite at the centimeter scale. Furthermore, the modeled in-diffusion profiles and spatial concentration distributions show similar shape and pattern to those from the LTD experiment. It was concluded that the use of detailed structure characterization and quantitative data on heterogeneity can significantly improve the interpretation and evaluation of transport experiments. |
英文关键词 | diffusion sorption transport modeling Time Domain Random Walk crystalline rock X-ray tomography |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000418736700033 |
WOS关键词 | FREE-RADICAL POLYMERIZATION ; SITU DIFFUSION EXPERIMENT ; PORE-SPACE GEOMETRY ; TIME RANDOM-WALKS ; IN-SITU ; FRACTURED MEDIA ; ROCK MATRIX ; HYDRODYNAMIC TRANSPORT ; THERMAL INITIATOR ; LABORATORY-SCALE |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21136 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Helsinki, Dept Chem, Helsinki, Finland; 2.Univ Poitiers, Inst Chem, Poitiers, France; 3.Univ Jyvaskyla, Deparment Phys, Jyvaskyla, Finland; 4.Natl Cooperat Disposal Radioact Waste, Wettingen, Switzerland |
推荐引用方式 GB/T 7714 | Voutilainen, Mikko,Kekalainen, Pekka,Siitari-Kauppi, Marja,et al. Modeling Transport of Cesium in Grimsel Granodiorite With Micrometer Scale Heterogeneities and Dynamic Update of K-d[J]. WATER RESOURCES RESEARCH,2017,53(11). |
APA | Voutilainen, Mikko.,Kekalainen, Pekka.,Siitari-Kauppi, Marja.,Sardini, Paul.,Muuri, Eveliina.,...&Martin, Andrew.(2017).Modeling Transport of Cesium in Grimsel Granodiorite With Micrometer Scale Heterogeneities and Dynamic Update of K-d.WATER RESOURCES RESEARCH,53(11). |
MLA | Voutilainen, Mikko,et al."Modeling Transport of Cesium in Grimsel Granodiorite With Micrometer Scale Heterogeneities and Dynamic Update of K-d".WATER RESOURCES RESEARCH 53.11(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论