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All publications of “José Domingos Fabris”

4 results

Chemical-Mineralogical Characterization of Magnetic Materials from Magnetic Soils of the Southern Espinhaço Mountain Chain and of the Upper Jequitinhonha Valley, State of Minas Gerais, Brazil

Alexandre Christófaro Silva, Solange de Souza, José Domingos Fabris, Maurício Soares Barbosa, Uidemar Morais Barral, Roberto Vial Costa


ABSTRACT In the Southern Espinhaço Mountain Chain and in the Upper Jequitinhonha Valley, magnetic soils, in different pedogenetic stages, are found to be forming over intrusions of basic lithology. The essential chemical and mineralogical properties of samples from magnetic soil profiles from those two physiographic environments in the state of Minas Gerais, Brazil, are reported. Three of the pedons (Rhodic Kandiustox – RKox, Rhodic Haplustox – RHox, and Typic Argiustoll – TAoll) were identified as being indeed developed over basic […]

Pedogenesis and classification of latosols developed from itabirites in the region of Quadrilátero Ferrífero in Minas Gerais

Samuel Ângelo Diógenes Costa, João Carlos Ker, Diana Ferreira de Freitas Simões, Maurício Paulo Ferreira Fontes, José Domingos Fabris, Felipe Vaz Andrade


Located in the Midwest of the State of Minas Gerais, a region called Quadrilátero Ferrífero covers an area of approximately 7,000 km2. Since the seventeenth century, it is known as gold- and iron-producing province, and the geological context is therefore one of the best-studied of Brazil. The regional topography is very rugged, with mostly poorly developed pedogenesis, especially Cambissolos Háplicos, Neossolos Litólicos and Neossolos Regolíticos. In a smaller proportion and on colluvial ramps (hilly relief), very Fe-rich Latossolos Vermelhos occur, […]

Potential use of a chemical leaching reject from a kaolin industry as agricultural fertilizer

Fabiana Rodrigues Ribeiro, Fernando Barboza Egreja Filho, José Domingos Fabris, Wagner da Nova Mussel, Roberto Ferreira Novais


The industrial refining of kaolin involves the removal of iron oxides and hydroxides along with other impurities that cause discoloration of the final product and depreciate its commercial value, particularly undesirable if destined to the paper industry. The chemical leaching in the industrial processing requires treatments with sodium hyposulfite, metallic zinc, or sulfuric and phosphoric acids, in order to reduce, dissolve and remove ferruginous compounds. To mitigate the environmental impact, the acidic effluent from the leaching process must be neutralized, […]

Magnesioferrite and pedogenetic transformation pathway of magnetic iron oxides in two soil profiles developing on tuffite of the Alto Paranaíba region, state of Minas Gerais, Brazil

Fernando Dias da Silva, Paulo Rogério da Costa Couceiro, José Domingos Fabris, Antonio Taranto Goulart, João Carlos Ker


Tuffite-derived magnetic soils in the Alto Paranaíba region, State of Minas Gerais, Brazil, have a variable mineralogy and are assumed to contain iron oxides that are isoestructural to spinel, more specifically, (Mg,Ti)-rich magnetite and maghemite. In this study, magnetic portions (saturation magnetization, 34.4 < s/J T-1 kg-1 < 43.7) were separated from sand fractions of pedomaterials of a Brunizem (Chernosol) (samples labeled AP31CR; AP31B and AP31A) and of a leptic Chernosol (AP33CR e AP33A) developed from tuffite were collected near the city of Patos de Minas, […]