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  4. 中国科学院页岩气与地质工程重点实验室
High-resolution characterization of nanoparticle transport in heterogeneous porous media via low-field nuclear magnetic resonance

文献类型：期刊论文

作者Zhang, Qian1,5,6; Dong, Yanhui1,5,6; Deng, Hang4; Elsworth, Derek2,3
刊名JOURNAL OF HYDROLOGY
出版日期2020-04-01
卷号583页码:9
关键词Nanoparticle transport Porous media Low-field nuclear magnetic resonance Heterogeneity
ISSN号0022-1694
DOI10.1016/j.jhydrol.2020.124558
英文摘要Understanding the transport of nanoparticles (NPs), including nanoscale zero-valent iron (nZVI) particles, through water-saturated porous media has important implications for many natural and engineered systems. For the first time, we use spin-echo single point imaging (SE-SPI) of low-field Nuclear Magnetic Resonance (LF-NMR) to monitor nanoparticle transport through a heterogeneous porous medium. The ability of this method to provide information of nano- to micro-scale pore structure and to monitor transient processes is verified by a transport experiment using modified nZVI particles. Early breakthrough of the NP front and large amount of residual NPs (27% of the iron was retained in the core) were observed in the experiment. These observations were due to the presence of preferential flow paths and dead-end pores as demonstrated by micro X-ray Computed Tomography (mu CT) imaging. Spatial and temporal data provided by this method enabled numerical simulations to quantify the impacts of spatial heterogeneity in pore structure on NP transport in terms of transport parameters. The simulation that captures the spatial heterogeneity by explicitly considering four regions of distinct porosities outperforms the model assuming a homogeneous pore structure. The maximum of residual sum of squares reduced from 0.328 to 0.138 when considering the impact of pore structure. The transport parameters vary significantly among different regions. For example, in the lowest porosity region of this sandstone, colloid dispersion (D) is 0.10 cm(2)/min instead of 0.20 cm(2)/min in the most connected region, while the attachment (k(ac)) increased from 0.007 to 0.025 min(-1). Overall, SE-SPI imaging is shown to be an important tool in refining transport processes of NPs in heterogeneous porous media with application to constrain complex natural systems.
WOS关键词ZERO-VALENT IRON ; MRI CONTRAST AGENTS ; SOLUTE TRANSPORT ; IMPACT ; TOMOGRAPHY ; PRINCIPLES ; REACTIVITY ; PARTICLES ; NZVI ; FLOW
资助项目Beijing Natural Science Foundation[8162042] ; Youth Innovation Promotion Association CAS[2016063]
WOS研究方向Engineering ; Geology ; Water Resources
语种英语
WOS记录号WOS:000527388300043
出版者ELSEVIER
资助机构Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS
源URL[http://ir.iggcas.ac.cn/handle/132A11/96223]  
专题地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者Dong, Yanhui
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
2.Penn State Univ, EMS Energy Inst, University Pk, PA 16802 USA
3.Penn State Univ, Dept Energy & Mineral Engn, G3 Ctr, University Pk, PA 16802 USA
4.Lawrence Berkeley Natl Lab, Energy Geosci Div, Earth & Environm Sci Area, Berkeley, CA USA
5.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Qian,Dong, Yanhui,Deng, Hang,et al. High-resolution characterization of nanoparticle transport in heterogeneous porous media via low-field nuclear magnetic resonance[J]. JOURNAL OF HYDROLOGY,2020,583:9.
APA Zhang, Qian,Dong, Yanhui,Deng, Hang,&Elsworth, Derek.(2020).High-resolution characterization of nanoparticle transport in heterogeneous porous media via low-field nuclear magnetic resonance.JOURNAL OF HYDROLOGY,583,9.
MLA Zhang, Qian,et al."High-resolution characterization of nanoparticle transport in heterogeneous porous media via low-field nuclear magnetic resonance".JOURNAL OF HYDROLOGY 583(2020):9.

入库方式： OAI收割

来源：地质与地球物理研究所

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