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@ARTICLE{CalabiFloody:279745,
author = {Calabi-Floody, M. and Rumpel, C. and Velásquez, G. and
Violante, A. and Bol, R. and Condron, L. M and Mora, M. L},
title = {{R}ole of {N}anoclays in {C}arbon stabilization in
{A}ndisols and {C}ambisols},
journal = {Journal of soil science and plant nutrition},
volume = {15},
number = {3},
issn = {0718-9516},
address = {Temuco},
publisher = {Sociedad Chilena de la Ciencia del Suelo},
reportid = {FZJ-2015-07627},
pages = {587-604},
year = {2015},
abstract = {Greenhouse gas (GHG) emissions and their consequent effect
on global warming are an issue of global environmental
concern. Increased carbon (C) stabilization and
sequestration in soil organic matter (SOM) is one of the
ways to mitigate these emissions. Here we evaluated the role
of nanoclays isolated from soil on C stabilization in both a
C rich Andisols and C depleted Cambisols. Nanoclays were
analyzed for size and morphology by transmission electron
microscopy, for elemental composition and molecular
composition using pyrolysis-GC/MS. Moreover, nanoclays were
treated with H2O2 to isolate stable SOM associated with
them. Our result showed better nanoclay extraction
efficiency and higher nanoclay yield for Cambisol compared
to Andisols, probably related to their low organic matter
content. Nanoclay fractions from both soils were different
in size, morphology, surface reactivity and SOM content.
Nanoclays in Andisols sequester around 5-times more C than
Cambisols, and stabilized 6 to 8-times more C than Cambisols
nanoclay after SOM chemical oxidation. Isoelectric points
and surface charge of nanoclays extracted from the two soils
was very different. However, the chemical reactivity of the
nanoclay SOM was similar, illustrating their importance for
C sequestration. Generally, the precise C stabilization
mechanisms of both soils may be different, with nanoscale
aggregation being more important in Andisols. We can
conclude that independent of the soil type and mineralogy
the nanoclay fraction may play an important role in C
sequestration and stabilization in soil-plant systems.},
cin = {IBG-3},
ddc = {580},
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},
doi = {10.4067/S0718-95162015005000026},
url = {https://juser.fz-juelich.de/record/279745},
}