uu.seUppsala University Publications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Transport and mobilization of multiwall carbon nanotubes in quartz sand under varying saturation
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL. (Geohydrology)
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
2014 (English)In: Environmental Earth Sciences, ISSN 1866-6280, Vol. 71, no 8, 3751-3760 p.Article in journal (Refereed) Published
Abstract [en]

In this study, a series of sand packed columnswere used to investigate the mobility of multiwall carbonnanotubes (MWCNTs) in unsaturated porous media underunfavorable conditions for deposition. The flow throughcolumn experiments were designed to assess water content,flow rate, and grain size effect on the mobility ofMWCNTs. It was found that variation in water content hadno significant effect on retention of MWCNTs until it waslowered to 16 % effective saturation. Thick water films,high flow rate, and repulsive forces between MWCNTs andporous media made MWCNTs highly mobile. Differentporous media grain sizes (D50 = 150–300 lm) were usedin this study. The mobility of MWCNTs slightly decreasedin finer grain sands, which was deemed to be an effect ofincrease in surface area and the number of depositionalsites, in combination with low-pore water velocity. However,physical straining was not observed in selected finegrainsands and aspect ratio of MWCNTs had low impacton mobility. Variations in pore-water velocity were producedby both changes in water saturation and in flow rate.At high pore-water velocities, the MWCNTs were generallymobile. However, for the combination of low-porewater velocity with either low water saturation or smallgrain size, some retention of MWCNTs was observed.Hence, low velocity in combination with flow throughsmaller pores increased MWCNT deposition.

Place, publisher, year, edition, pages
2014. Vol. 71, no 8, 3751-3760 p.
Keyword [en]
MWCNTs, Mobility, Unsaturated porous media, Water content, Flow rate
National Category
Oceanography, Hydrology, Water Resources
Identifiers
URN: urn:nbn:se:uu:diva-209263DOI: 10.1007/s12665-013-2769-1ISI: 000333475800038OAI: oai:DiVA.org:uu-209263DiVA: diva2:656521
Available from: 2013-10-16 Created: 2013-10-16 Last updated: 2014-05-12Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Authority records BETA

Sharma, PrabhakarFagerlund, Fritjof

Search in DiVA

By author/editor
Sharma, PrabhakarFagerlund, Fritjof
By organisation
Department of Earth SciencesLUVAL
Oceanography, Hydrology, Water Resources

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 865 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf