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@PHDTHESIS{Zhang:828392,
      author       = {Zhang, Miaoyue},
      title        = {{T}ransport, co-transport, and retention of functionalized
                      multi-walled carbon nanotubes in porous media},
      volume       = {352},
      school       = {RWTH Aachen},
      type         = {Dr.},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2017-02353},
      isbn         = {978-3-95806-198-9},
      series       = {Schriften des Forschungszentrums Jülich Reihe Energie $\&$
                      Umwelt / Energy $\&$ Environment},
      pages        = {VII, 112 S.},
      year         = {2016},
      note         = {RWTH Aachen, Diss., 2016},
      abstract     = {The information on transport and retention behavior of
                      functionalized multiwalled carbon nanotubes (MWCNTs) in
                      porous media is essential for environmental protection and
                      remediation due to the wide applications of MWCNTs and lack
                      of disposal regulations. The aim of this study is therefore
                      to investigate: i) the attachment, transport, retention and
                      remobilization of $^{14}$C-labeled functionalized MWCNTs
                      indifferent porous media (quartz sand (QS), goethite-coated
                      quartz sand (GQS), and soil), ii) co-transport of pollutants
                      (chlordecone (CLD) and sulfadiazine (SDZ)) byMWCNTs, and
                      iii) the role of surfactant on MWCNTs transport as a modeled
                      soilremediation process, based on column and batch
                      experiments at the environmentally relevant concentrations
                      under various physiochemical conditions. The breakthrough
                      curves (BTCs) and retention profiles (RPs) were determined
                      and simulated based on advective- dispersive equation by
                      using different numerical models that considered both time-
                      and depth- dependent blocking functions. The effect of
                      goethite coating on MWCNTs transport was conducted in
                      mixtures of negatively charged QS and positively charged
                      GQS. The linear equilibrium sorption model provided a good
                      description of batch results, and the distribution
                      coefficients (KD) drastically increased with the GQS
                      fraction that was electrostatically favorable for retention.
                      Similarly, retention of MWCNTs increased with the GQS
                      fraction in packed column experiments. However, calculated
                      values ofKD on GQS were around two orders of magnitude
                      smaller in batch than packed column experiments due to
                      differences in lever arms associated with hydrodynamic and
                      adhesive torques at microscopic roughness locations.
                      Furthermore, the fraction of the chemically heterogeneous
                      sand surface area that was favorable for retention was much
                      smaller than the GQS fraction, presumably because nanoscale
                      roughness produced shallow interactions that were
                      susceptible to removal. These observations indicated that
                      only a minor fraction of the GQS was favorable for MWCNT
                      retention. These same observations held for several
                      different sand sizes. [...]},
      cin          = {IBG-3},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {255 - Terrestrial Systems: From Observation to Prediction
                      (POF3-255)},
      pid          = {G:(DE-HGF)POF3-255},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
      urn          = {urn:nbn:de:0001-2017032864},
      url          = {https://juser.fz-juelich.de/record/828392},
}