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@INPROCEEDINGS{Krause:845116,
author = {Krause, Lars and Klumpp, Erwin and Siebers, Nina},
title = {{C}haracterization of small soil microaggregates and
nanocolloids using two flow field fractionation methods},
reportid = {FZJ-2018-02435},
year = {2018},
abstract = {Soil microaggregates (SMA, d <250 µm) play a key role for
the structure and ecological functions of soils. Small SMA
(<20 µm) are considered as the building units of these
aggregates. The knowledge about their distribution and
chemical composition helps to understand their role in SMA
formation and architecture. Our work focused on the
characterization of potential functional building units of
small SMA and their nucleus. We investigated the size
distribution and chemical composition of small SMA using
field flow fractionation methods. With centrifugal field
flow fractionation (CF3), we established a new method
allowing the fractionation of small SMA between 0.02-20 µm
which were further characterized by light scattering, UV and
ICP-MS. Furthermore, the nanocolloids (d<220 nm) were
analyzed with asymetric flow field flow fractionation (AF4)
coupled to a UV-detector and ICP-MS. The results showed that
the chemical composition as well as the size distribution of
small SMA including nanocolloids changed with the soil clay
content. The elements Al, Si, Fe and organic carbon in the
SMA size fractions revealed different mass ratios providing
a deeper insight into the composition of SMA building
units.},
month = {Apr},
date = {2018-04-08},
organization = {EGU General Assembly 2018, Vienna
(Austria), 8 Apr 2018 - 13 Apr 2018},
subtyp = {Other},
cin = {IBG-3},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {255 - Terrestrial Systems: From Observation to Prediction
(POF3-255) / MAD Soil - MAD Soil - Microaggregates:
Formation and turnover of the structural building blocks of
soils (251268514)},
pid = {G:(DE-HGF)POF3-255 / G:(GEPRIS)251268514},
typ = {PUB:(DE-HGF)24},
url = {https://juser.fz-juelich.de/record/845116},
}