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https://repositorio.inpa.gov.br/handle/1/18037
Title: | Microscopy and spectroscopy analysis of carbon nanostructures in highly fertile Amazonian anthrosoils |
Authors: | Jório, Ado Ribeiro-Soares, Jenaina Cançado, Luiz Gustavo Falcão, Newton P.S. dos Santos, Hélio Ferreira Baptista, Daniel Lorscheitter Martins Ferreira, E. H. Archanjo, Bráulio Soares Achete, Carlos Alberto |
Keywords: | Carbon Based Materials Carbon Material Carbon Nanostructures Complex Morphology Ecosystem Sustainability Electron Energy Loss Energy Dispersive X-ray High Fertilities Humid Tropics Ion Exchange Capacity Land-use Systems Potential Model Scanning And Transmission Electron Microscopy Soil Fertility Structural Aspects Carbon Charcoal Electron Energy Loss Spectroscopy Microscopy, Electron Energy Dissipation Morphology Particles (particulate Matter) Raman Scattering Raman Spectroscopy Soils Transmission Electron Microscopy Geologic Models Ion Exchange Microscopy Nanotechnology Numerical Model Raman Spectroscopy Soil Carbon Soil Fertility Sustainability Amazonia |
Issue Date: | 2012 |
metadata.dc.publisher.journal: | Soil and Tillage Research |
metadata.dc.relation.ispartof: | Volume 122, Pags. 61-66 |
Abstract: | The anthropogenic Amazonian soil " Terra Preta de índio" (Amazonian Dark Earth) provides a potential model for a sustainable land-use system in the humid tropics. A large amount of carbon-based materials in this soil is responsible for its high fertility over long periods of usage, and soil scientists are trying to create " Terra Preta Nova" (New Dark Earth) by adding charcoal as a soil conditioner. By applying materials science tools, including scanning and transmission electron microscopy, energy dispersive X-ray, electron energy loss spectroscopy and Raman spectroscopy, we show that these millenary carbon materials exhibit a complex morphology, with particles ranging in size from micro- to nanometers, from the core to the surface of the carbon grains. From one side, our results might elucidate how nature solved the problem of keeping high levels of ion exchange capacity in these soils. From the other side, morphology and dimensionality are the key issues in nanotechnology, and the structural aspects revealed here may help generating the Terra Preta Nova, effectively improving world agriculture and ecosystem sustainability. © 2012 Elsevier B.V. |
metadata.dc.identifier.doi: | 10.1016/j.still.2012.02.009 |
Appears in Collections: | Artigos |
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