Role of Nanoclays in Carbon stabilization in Andisols and Cambisols

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 isolate...

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Autores principales:	Calabi-Floody,M, Rumpel,C, Velásquez,G, Violante,A, Bol,R, Condron,L. M, Mora,M.L
Lenguaje:	English
Publicado:	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo 2015
Materias:	Nanoclays Nanoparticle Soil organic matter Carbon stabilization Pyrolysis Andisols Cambisols
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162015000300004
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spelling	oai:scielo:S0718-951620150003000042015-10-14Role of Nanoclays in Carbon stabilization in Andisols and CambisolsCalabi-Floody,MRumpel,CVelásquez,GViolante,ABol,RCondron,L. MMora,M.L Nanoclays Nanoparticle Soil organic matter Carbon stabilization Pyrolysis Andisols Cambisols 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.info:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.15 n.3 20152015-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162015000300004en10.4067/S0718-95162015005000026
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Nanoclays Nanoparticle Soil organic matter Carbon stabilization Pyrolysis Andisols Cambisols
spellingShingle	Nanoclays Nanoparticle Soil organic matter Carbon stabilization Pyrolysis Andisols Cambisols Calabi-Floody,M Rumpel,C Velásquez,G Violante,A Bol,R Condron,L. M Mora,M.L Role of Nanoclays in Carbon stabilization in Andisols and Cambisols
description	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.
author	Calabi-Floody,M Rumpel,C Velásquez,G Violante,A Bol,R Condron,L. M Mora,M.L
author_facet	Calabi-Floody,M Rumpel,C Velásquez,G Violante,A Bol,R Condron,L. M Mora,M.L
author_sort	Calabi-Floody,M
title	Role of Nanoclays in Carbon stabilization in Andisols and Cambisols
title_short	Role of Nanoclays in Carbon stabilization in Andisols and Cambisols
title_full	Role of Nanoclays in Carbon stabilization in Andisols and Cambisols
title_fullStr	Role of Nanoclays in Carbon stabilization in Andisols and Cambisols
title_full_unstemmed	Role of Nanoclays in Carbon stabilization in Andisols and Cambisols
title_sort	role of nanoclays in carbon stabilization in andisols and cambisols
publisher	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
publishDate	2015
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162015000300004
work_keys_str_mv	AT calabifloodym roleofnanoclaysincarbonstabilizationinandisolsandcambisols AT rumpelc roleofnanoclaysincarbonstabilizationinandisolsandcambisols AT velasquezg roleofnanoclaysincarbonstabilizationinandisolsandcambisols AT violantea roleofnanoclaysincarbonstabilizationinandisolsandcambisols AT bolr roleofnanoclaysincarbonstabilizationinandisolsandcambisols AT condronlm roleofnanoclaysincarbonstabilizationinandisolsandcambisols AT moraml roleofnanoclaysincarbonstabilizationinandisolsandcambisols
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Role of Nanoclays in Carbon stabilization in Andisols and Cambisols

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