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@ARTICLE{Gottselig:877708,
author = {Gottselig, N. and Sohrt, J. and Uhlig, D. and Nischwitz, V.
and Weiler, M. and Amelung, W.},
title = {{G}roundwater controls on colloidal transport in forest
stream waters},
journal = {The science of the total environment},
volume = {717},
issn = {0048-9697},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2020-02411},
pages = {134638},
year = {2020},
abstract = {Biogeochemical changes of whole catchments may, at least in
part, be deduced from changes in streamwater composition. We
hypothesized that there are seasonal variations of natural
nanoparticles (NNP; 1–100 nm) and fine colloids (<300 nm)
in stream water, which differ in origin depending on
catchmentinflow parameters. To test this hypothesis, we
assessed the annual dynamics of the elemental compositionof
NNP and fine colloids in multiple water compartments, namely
in stream water, above and belowcanopy precipitation,
groundwater and lateral subsurface flow from the Conventwald
catchment,Germany. In doing so, we monitored meteorological
and hydrological parameters, total element loads,and
analyzed element concentrations of org C, Al, Si, P, Ca, Mn
and Fe by Asymmetric Flow Field FlowFractionation (AF4). The
results showed that colloid element concentrations were < 5
mmol/L. Up to anaverage of $55\%$ (Fe) of total element
concentrations were not truly dissolved but bound to NNP and
finecolloids. The colloid patterns showed seasonal
variability with highest loads in winter. The presence
ofgroundwater-derived colloidal Ca in stream water showed
that groundwater mainly fed the streamsthroughout the whole
year. Overall, the results showed that different water
compartments vary in theNNP and fine colloidal composition
making them a suitable tool to identify the streams NNP and
fine colloidsources. Given the completeness of the dataset
with respect to NNP and fine colloids in multiplewater
compartments of a single forest watershed this study adds to
the hitherto underexplored role ofNNP and fine colloids in
natural forest watersheds.},
cin = {IBG-3 / ZEA-3},
ddc = {610},
cid = {I:(DE-Juel1)IBG-3-20101118 / I:(DE-Juel1)ZEA-3-20090406},
pnm = {255 - Terrestrial Systems: From Observation to Prediction
(POF3-255)},
pid = {G:(DE-HGF)POF3-255},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:31837854},
UT = {WOS:000519994800060},
doi = {10.1016/j.scitotenv.2019.134638},
url = {https://juser.fz-juelich.de/record/877708},
}