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DOI | 10.1002/2016WR019727 |
Experimental investigation of the impact of compound-specific dispersion and electrostatic interactions on transient transport and solute breakthrough | |
Muniruzzaman, Muhammad1; Rolle, Massimo1,2 | |
2017-02-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; Denmark |
英文摘要 | This study investigates the effects of compound-specific diffusion/dispersion and electrochemical migration on transient solute transport in saturated porous media. We conducted laboratory bench-scale experiments, under advection-dominated regimes (seepage velocity: 0.5, 5, 25 m/d), in a quasi two-dimensional flow-through setup using pulse injection of multiple tracers (both uncharged and ionic species). Extensive sampling and measurement of solutes' concentrations (approximate to 1500 samples; >3000 measurements) were performed at the outlet of the flow-through setup, at high spatial and temporal resolution. The experimental results show that compound-specific effects and charge-induced Coulombic interactions are important not only at low velocities and/or for steady state plumes but also for transient transport under high flow velocities. Such effects can lead to a remarkably different behavior of measured breakthrough curves also at very high Peclet numbers. To quantitatively interpret the experimental results, we used four modeling approaches: classical advection-dispersion equation (ADE), continuous time random walk (CTRW), dual-domain mass transfer model (DDMT), and a multicomponent ionic dispersion model. The latter is based on the multicomponent formulation of coupled diffusive/dispersive fluxes and was used to describe and explain the electrostatic effects of charged species. Furthermore, we determined experimentally the temporal profiles of the flux-related dilution index. This metric of mixing, used in connection with the traditional solute breakthrough curves, proved to be useful to correctly distinguish between plume spreading and mixing, particularly for the cases in which the sole analysis of integrated concentration breakthrough curves may lead to erroneous interpretation of plume dilution. |
英文关键词 | breakthrough curves dispersion multicomponent diffusion flow-through experiments Fickian and anomalous transport mixing |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000398568800011 |
WOS关键词 | MULTICOMPONENT IONIC-DIFFUSION ; POROUS-MEDIA ; PORE-SCALE ; REACTIVE TRANSPORT ; MASS-TRANSFER ; DILUTION ; MODEL ; ELECTROLYTES ; ADVECTION ; ROCK |
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/22043 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Tubingen, Ctr Appl Geosci, Tubingen, Germany; 2.Tech Univ Denmark, Dept Environm Engn, Lyngby, Denmark |
推荐引用方式 GB/T 7714 | Muniruzzaman, Muhammad,Rolle, Massimo. Experimental investigation of the impact of compound-specific dispersion and electrostatic interactions on transient transport and solute breakthrough[J]. WATER RESOURCES RESEARCH,2017,53(2). |
APA | Muniruzzaman, Muhammad,&Rolle, Massimo.(2017).Experimental investigation of the impact of compound-specific dispersion and electrostatic interactions on transient transport and solute breakthrough.WATER RESOURCES RESEARCH,53(2). |
MLA | Muniruzzaman, Muhammad,et al."Experimental investigation of the impact of compound-specific dispersion and electrostatic interactions on transient transport and solute breakthrough".WATER RESOURCES RESEARCH 53.2(2017). |
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