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Browsing Artigos by Author "Abrahão, Walter Antônio Pereira"

Browsing Artigos by Author "Abrahão, Walter Antônio Pereira"

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  • Characterization of verdete rock as a potential source of potassium 
    Santos, Wedisson Oliveira; Mattiello, Edson Marcio; Costa, Liovando Marciano da; Abrahão, Walter Antônio Pereira (Revista Ceres, 2015-07-04)
    Potassium is a nutrient found at low levels in Brazilian soils, requiring large inputs of fertilizers to achieve satisfactory crop yields. Brazil has high external dependence and limited reserves of soluble K mineral, which ...
  • Cover layers to the growth of trees and shrobs over a sulfide spoil from gold mining 
    Assis, Igor Rodrigues de; Dias, Luiz Eduardo; Abrahão, Walter Antônio Pereira; Ribeiro Jr, Emerson Silva; Mello, Jaime Wilson Vargas de (Revista Árvore, 2011-04-20)
    This work was done at a gold mine company in Paracatu, MG, Brazil, and was conducted from March 2000 to November 2005. The substrate (spoil) studied was a phillite rock which contains sulfides such as pyrite and arsenopyrite. ...
  • Geochemistry and spatial variability of metal(loid) concentrations in soils of the state of Minas Gerais, Brazil 
    Souza, José João Lelis Leal de; Abrahão, Walter Antônio Pereira; Mello, Jaime Wilson Vargas de; Silva, Juscimar da; Costa, Liovando Marciano da; Oliveira, Teógenes Senna de (Science of The Total Environment, 2015-02-01)
    Since 2009 a policy has been implemented in Brazil to establish the natural concentrations of potentially toxic substances in soil for each state. Historically a ‘mining state’, Minas Gerais established a Quality Reference ...
  • Induction of a geochemical barrier for As, Fe and S immobilization in a sulfide substrate 
    Assis, Igor Rodrigues de; Dias, Luiz Eduardo; Abrahão, Walter Antônio Pereira; Mello, Jaime Wilson Vargas de; Veloso, Renato Welmer; Ribeiro Jr., Emerson Silva (Revista Brasileira de Ciência do Solo, 2012-01-24)
    Acid mine drainage (AMD) is an environmental concern due to the risk of element mobilization, including toxic elements, and inclusion in the food chain. In this study, three cover layers were tested to minimize As, Fe and ...
  • Reference values of soil quality for the Rio Doce Basin 
    Guevara, Yang Zumbo Coronel; Souza, José João Lelis Leal de; Veloso, Gustavo Vieira; Veloso, Renato Welmer; Rocha, Pablo Azevedo; Abrahão, Walter Antônio Pereira; Fernandes Filho, Elpídio Inácio (Revista Brasileira de Ciência do Solo, 2018-04-16)
    The great geological and soil variation in the state of Minas Gerais, Brazil, indicates the need for regional studies to understand the geochemical background of soils. The Rio Doce Basin became a priority area for geochemical ...
  • Soil-geomorphology interactions and paleoclimatic implications of an ornithogenic soil toposequence on Rata Island, Fernando de Noronha Archipelago, South Atlantic 
    Schaefer, Carlos Ernesto G. R.; Oliveira, Fábio Soares de; Abrahão, Walter Antônio Pereira; Clemente, Eliane de Paula; Simas, Felipe Nogueira Bello (Journal of South American Earth Sciences, 2014-07)
    The formation of highly phosphatized soils on sites of avian activity is a common feature of oceanic islands. We characterized a toposequence of phosphatic soils on Rata Island, to evaluate the soil genesis based on local ...
  • Thermal and chemical solubilization of verdete for use as potassium fertilizer 
    Santos, Wedisson Oliveira; Mattiello, Edson Marcio; Costa, Liovando Marciano da; Abrahão, Walter Antônio Pereira; Novais, Roberto Ferreira de; Cantarutti, Reinaldo Bertola (International Journal of Mineral Processing, 2015-07-10)
    Thermal and chemical treatments were used to investigate the solubilization of potassium from verdete, a glauconitic rock. Fluxing agents were evaluated at distinct temperatures and proportions. Chemical dissolution of ...
  • Valores de referência de qualidade para metais pesados em solos no Estado do Espírito Santo 
    Paye, Henrique de Sá; Mello, Jaime Wilson Vargas de; Abrahão, Walter Antônio Pereira; Fernandes Filho, Elpídio Inácio; Dias, Lívia Cristina Pinto; Castro, Maria Luisa Oliveira; Melo, Stefeson Bezerra de; França, Michele Milanez (Revista Brasileira de Ciência do Solo, 2010-08)
    Valores de referência de qualidade (VRQ) para metais pesados em solos, em âmbito mundial, são bastante heterogêneos. No Brasil, poucos estudos para estabelecer esses valores foram concluídos. Na ausência de VRQ para metais ...
  • Valores de referência local e avaliação da contaminação por zinco em solos adjacentes a áreas mineradas no município de Vazante-MG 
    Mello, Jaime Wilson Vargas de; Schaefer, Carlos Ernesto G. R; Dussin, Tânia Mara; Abrahão, Walter Antônio Pereira; Borges Júnior, Meubles (Revista Brasileira de Ciência do Solo, 2008-10)
    A contaminação dos solos por metais pesados é um problema atual que requer abordagem adequada, tendo em vista as necessidades da sociedade moderna. Em áreas de mineração, a avaliação da contaminação de solos constitui ...

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