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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},
}