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Browsing Artigos by Author "Abrahão, Walter Antônio Pereira"

Browsing Artigos by Author "Abrahão, Walter Antônio Pereira"

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  • 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 ...
  • 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. ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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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