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Reproducing the organic matter model of anthropogenic dark earth of Amazonia and testing the ecotoxicity of functionalized charcoal compounds

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Show simple item record Rodrigues Linhares, Carolina Lemke, Jasmin Auccaise, Ruben Avilez Duó, Daniele Lourenço Ziolli, Roberta Kwapinski, Witold Henrique Novotny, Etelvino 2018-01-11T12:31:48Z 2018-01-11T12:31:48Z 2012
dc.description peer-reviewed en_US
dc.description.abstract The objective of this work was to obtain organic compounds similar to the ones found in the organic matter of anthropogenic dark earth of Amazonia (ADE) using a chemical functionalization procedure on activated charcoal, as well as to determine their ecotoxicity. Based on the study of the organic matter from ADE, an organic model was proposed and an attempt to reproduce it was described. Activated charcoal was oxidized with the use of sodium hypochlorite at different concentrations. Nuclear magnetic resonance was performed to verify if the spectra of the obtained products were similar to the ones of humic acids from ADE. The similarity between spectra indicated that the obtained products were polycondensed aromatic structures with carboxyl groups: a soil amendment that can contribute to soil fertility and to its sustainable use. An ecotoxicological test with Daphnia similis was performed on the more soluble fraction (fulvic acids) of the produced soil amendment. Aryl chloride was formed during the synthesis of the organic compounds from activated charcoal functionalization and partially removed through a purification process. However, it is probable that some aryl chloride remained in the final product, since the ecotoxicological test indicated that the chemical functionalized soil amendment is moderately toxic. en_US
dc.language.iso eng en_US
dc.publisher Embrapa Informação Tecnológica en_US
dc.relation.ispartofseries Pesquisa Agropecuária Brasileira;47 (5), pp. 693-698
dc.subject daphnia similis en_US
dc.subject biochar en_US
dc.subject chemical oxidation en_US
dc.subject fractionation of humic substances en_US
dc.subject nuclear magnetic resonance en_US
dc.subject pyrogenic carbon en_US
dc.title Reproducing the organic matter model of anthropogenic dark earth of Amazonia and testing the ecotoxicity of functionalized charcoal compounds en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.1590/S0100-204X2012000500009
dc.contributor.sponsor Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US

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