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@ARTICLE{Adrian:865860,
      author       = {Adrian, Yorck F. and Schneidewind, Uwe and Bradford, Scott
                      A. and Šimůnek, Jirka and Klumpp, Erwin and Azzam, Rafig},
      title        = {{T}ransport and retention of engineered silver
                      nanoparticles in carbonate-rich sediments in the presence
                      and absence of soil organic matter},
      journal      = {Environmental pollution},
      volume       = {255},
      number       = {Part 1},
      issn         = {0269-7491},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2019-05148},
      pages        = {113124 -},
      year         = {2019},
      abstract     = {The transport and retention behavior of polymer- (PVP-AgNP)
                      and surfactant-stabilized (AgPURE) silver nanoparticles in
                      carbonate-dominated saturated and unconsolidated porous
                      media was studied at the laboratory scale. Initial column
                      experiments were conducted to investigate the influence of
                      chemical heterogeneity (CH) and nano-scale surface roughness
                      (NR) arising from mixtures of clean, positively charged
                      calcium carbonate sand (CCS), and negatively charged quartz
                      sands. Additional column experiments were performed to
                      elucidate the impact of CH and NR arising from the presence
                      and absence of soil organic matter (SOM) on a natural
                      carbonate-dominated aquifer material. The role of the
                      nanoparticle capping agent was examined under all conditions
                      tested in the column experiments. Nanoparticle transport was
                      well described using a numerical model that facilitated
                      blocking on one or two retention sites. Results demonstrate
                      that an increase in CCS content in the artificially mixed
                      porous medium leads to delayed breakthrough of the AgNPs,
                      although AgPURE was much less affected by the CCS content
                      than PVP-AgNPs. Interestingly, only a small portion of the
                      solid surface area contributed to AgNP retention, even on
                      positively charged CCS, due to the presence of NR which
                      weakened the adhesive interaction. The presence of SOM
                      enhanced the retention of AgPURE on the natural
                      carbonate-dominated aquifer material, which can be a result
                      of hydrophobic or hydrophilic interactions or due to cation
                      bridging. Surprisingly, SOM had no significant impact on
                      PVP-AgNP retention, which suggests that a reduction in
                      electrostatic repulsion due to the presence of SOM outweighs
                      the relative importance of other binding mechanisms. Our
                      findings are important for future studies related to AgNP
                      transport in shallow unconsolidated calcareous and siliceous
                      sands.},
      cin          = {IBG-3},
      ddc          = {690},
      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)16},
      pubmed       = {pmid:31622956},
      UT           = {WOS:000499733500030},
      doi          = {10.1016/j.envpol.2019.113124},
      url          = {https://juser.fz-juelich.de/record/865860},
}