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@ARTICLE{Santner:203158,
      author       = {Santner, Jakob and Kreuzeder, Andreas and Schnepf, Andrea
                      and Wenzel, Walter W.},
      title        = {{N}umerical {E}valuation of {L}ateral {D}iffusion {I}nside
                      {D}iffusive {G}radients in {T}hin {F}ilms {S}amplers},
      journal      = {Environmental science $\&$ technology},
      volume       = {49},
      number       = {10},
      issn         = {1520-5851},
      address      = {Columbus, Ohio},
      publisher    = {American Chemical Society},
      reportid     = {FZJ-2015-05163},
      pages        = {6109 - 6116},
      year         = {2015},
      abstract     = {Using numerical simulation of diffusion inside diffusive
                      gradients in thin films (DGT) samplers, we show that the
                      effect of lateral diffusion inside the sampler on the solute
                      flux into the sampler is a nonlinear function of the
                      diffusion layer thickness and the physical sampling window
                      size. In contrast, earlier work concluded that this effect
                      was constant irrespective of parameters of the sampler
                      geometry. The flux increase caused by lateral diffusion
                      inside the sampler was determined to be $∼8.8\%$ for
                      standard samplers, which is considerably lower than the
                      previous estimate of $∼20\%.$ Lateral diffusion is also
                      propagated to the diffusive boundary layer (DBL), where it
                      leads to a slightly stronger decrease in the mass uptake
                      than suggested by the common 1D diffusion model that is
                      applied for evaluating DGT results. We introduce a simple
                      correction procedure for lateral diffusion and demonstrate
                      how the effect of lateral diffusion on diffusion in the DBL
                      can be accounted for. These corrections often result in
                      better estimates of the DBL thickness (δ) and the
                      DGT-measured concentration than earlier approaches and will
                      contribute to more accurate concentration measurements in
                      solute monitoring in waters.},
      cin          = {IBG-3},
      ddc          = {050},
      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},
      UT           = {WOS:000355058300033},
      doi          = {10.1021/acs.est.5b00134},
      url          = {https://juser.fz-juelich.de/record/203158},
}