Fulvic Acid Acid Base Properties
Mostrando 1-4 de 4 artigos, teses e dissertações.
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1. Soil Physical and Chemical Properties in Epigeal Termite Mounds in Pastures
ABSTRACT We characterized soil physical and chemical properties and soil organic matter in epigeal termite mounds in pastures to evaluate the changes promoted by termites in comparison to an adjacent area. We selected seven active epigeal termite mounds in the municipality of Seropédica, state of Rio de Janeiro, Brazil. Soil samples were collected from top
Floresta Ambient.. Publicado em: 19/03/2018
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2. Propriedades ácido-base e de complexação de ácidos húmico e fúlvico isolados de vermicomposto
Proton binding properties of humic and fulvic acids were studied by potentiometric titration. Carboxylic groups were the predominant ionizable sites in comparison to phenolic and amine groups. Total acidity of fulvic acid was 12 x 10-3 mol g-1, a number significantly higher than that obtained for humic acid (5.2 x 10-3 mol g-1). Copper ion binding was evalua
Química Nova. Publicado em: 2007-10
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3. Chemical and spectroscopic characterization of organic matter in Brazilian soils / Caracterização química e espectroscópica da matéria orgânica em solos do Brasil
The importance on the study of organic matter in pedology and soil classification studies in tropical regions can be substantiated by the differential attributes: organic carbon content, degree of organic matter decomposition, and fibers content. However, quantitative and qualitative variables such as chemical fractionating of organic matter and spectroscopi
Publicado em: 2006
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4. Humic substances extracted from vermicompost. Acid base and complexing properties with Cu(II) / Isolamento, purificação e caracterização de substâncias húmicas isoladas de vermicomposto. Propriedades ácido-base e de complexação com íons Cu(II)
Estudaram-se as propriedades ácido base e de complexação com íons Cu(II) dos ácidos húmico (AH) e fúlvico (AF) extraídos de vermicomposto. O isolamento e a purificação foram realizados de acordo com o método descrito pela Sociedade Internacional de Substâncias Húmicas (IHSS). Estudaram-se as propriedades ácido-base por titulação potenciométr
Publicado em: 2005