Nanoclays from an Andisol: Extraction, properties and carbon stabilization
| Autor: | Alejandra A. Jara, Marcela Calabi-Floody, Mark E. Welland, Benny K.G. Theng, Cornelia Rumpel, James S. Bendall, María de la Luz Mora |
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| Přispěvatelé: | PROGRAMA DE DOCTORADO EN CIENCIAS DE RECURSOS NATURALES, Universidad de la frontera [Chile], NANOSCIENCE CENTRE, University of Cambridge [UK] (CAM), Manaaki Whenua – Landcare Research [Lincoln], SCIENTIFIC AND TECHNOLOGICAL BIORESOURCES NUCLEUS (BIOREN-UFRO), Biogéochimie et écologie des milieux continentaux (Bioemco), Centre National de la Recherche Scientifique (CNRS)-AgroParisTech-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Recherche Agronomique (INRA)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), LANDCARE RESEARCH, Landcare Research, Universidad de la Frontera (UFRO), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Université Pierre et Marie Curie - Paris 6 (UPMC)-AgroParisTech-Centre National de la Recherche Scientifique (CNRS), CONICYT (National Foundation for Science and Technology), Chile under FONDECYT [1061262, 11070241], ECOSSUD-CONICYT [C08U01] |
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
[SDV]Life Sciences [q-bio]
NEW-ZEALAND Soil Science chemistry.chemical_element Mineralogy Nanoparticle Carbon stabilization 010501 environmental sciences SEQUESTRATION 01 natural sciences complex mixtures Nanomaterials Allophane NANOPARTICLES Organic matter HUMIC SUBSTANCES VOLCANIC ASH 0105 earth and related environmental sciences chemistry.chemical_classification ALLOPHANIC SOILS SOIL ORGANIC-MATTER SUBSOIL HORIZONS Allophane-organic complexes Nanoclays 04 agricultural and veterinary sciences Andisol chemistry Chemical engineering ACFOREST SOILS [SDE]Environmental Sciences 040103 agronomy & agriculture 0401 agriculture forestry and fisheries CULTIVATION CHRONOSEQUENCE Clays Clay minerals Carbon Pyrolysis |
| Zdroj: | Geoderma Geoderma, Elsevier, 2011, 2011 (161), pp.159-167 GEODERMA Artículos CONICYT CONICYT Chile instacron:CONICYT Geoderma, 2011, 161 (3-4), pp.159-167. ⟨10.1016/j.geoderma.2010.12.013⟩ Geoderma, Elsevier, 2011, 161 (3-4), pp.159-167. ⟨10.1016/j.geoderma.2010.12.013⟩ Geoderma, 2011, 2011 (161), pp.159-167 |
| ISSN: | 0016-7061 1872-6259 |
| DOI: | 10.1016/j.geoderma.2010.12.013⟩ |
| Popis: | International audience; Soils contain an abundance of nano-size particles. Because of their tendency to aggregate and associate with organic colloids, however, soil nanoparticles are difficult to obtain and characterize. Here we report on a simple and rapid method of extracting mesoporous nanomaterials from the clay fraction of an Andisol with narrow size distribution. The clay and nanoclay were characterized by elemental analysis, pyrolysis GC/MS, electron and atomic force microscopy, infrared spectroscopy, and electrophoresis. The nanoclay dominantly consists of hollow allophane spherules forming globular aggregates of about 100 nm in diameter. The nanoclay contains more organic matter (carbon and nitrogen) with a larger proportion of polysaccharides and nitrogen containing compounds, and has a lower isoelectric point, than the clay. Treatment with hydrogen peroxide causes a large decrease in the organic matter contents of both nanoclay and clay. The aggregates of allophane nanoparticles retain a significant amount (similar to 12%) of carbon against intensive peroxide treatment. Thus, besides playing an important role in carbon stabilization, these naturally occurring nanomaterials are potentially useful for developing a low-cost carbon sequestration technology. (C) 2010 Elsevier B.V. All rights reserved. |
| Databáze: | OpenAIRE |
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