| DOI: | 10.1016/j.watres.2017.11.019
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| Scopus记录号: | 2-s2.0-85035333837
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| 论文题名: | Transport of iron nanoparticles through natural discrete fractures |
| 作者: | Cohen M.; Weisbrod N.
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| 刊名: | Water Research
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| ISSN: | 431354
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| 出版年: | 2018
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| 卷: | 129 | | 起始页码: | 375
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| 结束页码: | 383
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| 语种: | 英语
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| 英文关键词: | Colloid transport
; Fractured media
; Groundwater remediation
; Iron nanoparticles
; nZVI
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| Scopus关键词: | Aquifers
; Fracture
; Groundwater pollution
; Groundwater resources
; Hydrogeology
; Ionic strength
; Iron
; Nanoparticles
; Particle size
; Stability
; Colloid transport
; Fractured media
; Ground water remediation
; Iron nanoparticles
; nZVI
; Recovery
; activated carbon
; ferric hydroxide
; humic acid
; iron nanoparticle
; polyacrylic acid
; stabilizing agent
; ground water
; iron
; metal nanoparticle
; aquifer
; colloid
; concentration (composition)
; groundwater
; hydrogeochemistry
; iron nanoparticle
; remediation
; Article
; fracture
; gravity
; ionic strength
; iron transport
; particle size
; priority journal
; sedimentation rate
; viscosity
; ecosystem restoration
; porosity
; water flow
; Environmental Restoration and Remediation
; Groundwater
; Iron
; Metal Nanoparticles
; Particle Size
; Porosity
; Viscosity
; Water Movements
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| 英文摘要: | The transport of nano scale iron particles (NIP) in fractures is of concern for remediation of both fractured aquifers and porous aquifers when hydro-fracking and flow in preferential pathways takes place. In this study the transport of various NIP in a natural discrete fractured chalk core was investigated and their mass recoveries calculated. Four different types of NIP were tested and characterized in two ionic strength (IS) solutions at a particle concentration of 100–200 mg/l. The effect of IS, stability (sedimentation rate), particle size, solution viscosity and stabilizer were studied. NIP stability ranged from 1 to 100% following 120 min of stability tests and recoveries ranged from about 6 to 69%. The stabilizer type and concentration were shown to have significant role in NIP recoveries, especially at increased IS. It was evident that gravitational stability is the most crucial factor dominating transport of NIP. Accordingly, stability tests were shown to be a reliable indicator of NIP mobility. The high recoveries of some NIP tested, combined with the lack of clogging effect illustrates the enhanced mobility of NIP in fractures. The wide range of recoveries indicates NIP transport manipulation potential in such media. We therefore suggest that application of NIP in contaminated fractures has considerable potential as a remediation measure. In order to achieve NIP distribution in the aquifer while avoiding leakage to the environment, NIP stabilizer concentration should be adjusted according to the site-specific hydrogeochemical properties of the contaminated media. © 2017 Elsevier Ltd |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/113079
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| Appears in Collections: | 气候减缓与适应
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作者单位: | The Zuckerberg Institute for Water Research, Blaustein Institutes for Desert Research, Ben Gurion University of the Negev, Israel
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| Recommended Citation: | |
Cohen M.,Weisbrod N.. Transport of iron nanoparticles through natural discrete fractures[J]. Water Research,2018-01-01,129
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