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Your search keyword '"Angelica, Rômulo Simões"' showing total 18 results
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18 results on '"Angelica, Rômulo Simões"'

2. Changes in the surface water quality of a tropical watershed in the southeastern amazon due to the environmental impacts of artisanal mining

Author

Salomão, Gabriel Negreiros, Dall’Agnol, Roberto, Sahoo, Prafulla Kumar, Almeida, Gabriel Soares de, Amarante, Rafael Tarantino, Zeferino, Leiliane Bozzi, Lopes, João Paulo Nobre, Souza Filho, Pedro Walfir Martins e, Costa, Normara Yane Mar da, Guimarães, José Tasso Felix, Silva, Marcio Sousa da, Martins, Gabriel Caixeta, Teixeira, Mayara Fraeda Barbosa, Marques, Eduardo Duarte, Angélica, Rômulo Simões, and Araújo, Wilker Emmanoel Oliveira

Published
2023
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3. In utero and lactational exposure to methylmercury elicits physical-chemical and morphological damages in the alveolar bone of offspring rats: The first toxicological findings

Author

Chemelo, Victória Santos, Nascimento, Priscila Cunha, Bittencourt, Leonardo Oliveira, Souza-Monteiro, Deiweson, Balbinot, Gabriela Souza, Albuquerque, Alan Rodrigo Leal, Silva, Márcia Cristina Freitas, da Paz, Simone Patricia Aranha, Angélica, Rômulo Simões, Prado, Alejandro Ferraz, Martins, Manoela Domingues, Collares, Fabricio Mezzomo, Crespo-Lopez, Maria Elena, and Lima, Rafael Rodrigues

Published
2022
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6. Regional-scale mapping for determining geochemical background values in soils of the Itacaiúnas River Basin, Brazil: The use of compositional data analysis (CoDA)

Author

Sahoo, Prafulla Kumar, Dall'Agnol, Roberto, Salomão, Gabriel Negreiros, Junior, Jair da Silva Ferreira, Silva, Marcio Sousa, e Souza Filho, Pedro Walfir Martins, da Costa, Marcondes Lima, Angélica, Rômulo Simões, Filho, Carlos Augusto Medeiros, da Costa, Marlene Furtado, Guilherme, Luiz Roberto Guimarães, and Siqueira, José Oswaldo

Published
2020
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8. Geochemical mapping in stream sediments of the Carajás Mineral Province: Background values for the Itacaiúnas River watershed, Brazil

Author

Salomão, Gabriel Negreiros, Dall'Agnol, Roberto, Sahoo, Prafulla K., Angélica, Rômulo Simões, de Medeiros Filho, Carlos A., Ferreira Júnior, Jair da Silva, Sousa da Silva, Marcio, Souza Filho, Pedro Walfir Martins e, Nascimento Junior, Wilson da Rocha, da Costa, Marlene F., Guilherme, Luiz Roberto Guimarães, and Siqueira, José Oswaldo de

Published
2020
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10. Source and background threshold values of potentially toxic elements in soils by multivariate statistics and GIS-based mapping: a high density sampling survey in the Parauapebas basin, Brazilian Amazon

Author

Sahoo, Prafulla Kumar, Dall’Agnol, Roberto, Salomão, Gabriel Negreiros, da Silva Ferreira Junior, Jair, da Silva, Marcio Souza, Martins, Gabriel Caixeta, e Souza Filho, Pedro Walfir Martin, Powell, Mike A., Maurity, Clovis Wagner, Angelica, Rômulo Simões, da Costa, Marlene Furtado, and Siqueira, José Oswaldo

Published
2020
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14. Enhancing iron biogeochemical cycling for canga ecosystem restoration: insights from microbial stimuli.

Author

da Silva, Rayara do Socorro Souza, Cardoso, Aline Figueiredo, Angelica, Rômulo Simões, Bitencourt, José Augusto P., Moreira, Julio Cezar Fornazier, Lucheta, Adriano Reis, de Oliveira Prado, Isabelle Gonçalves, Candela, Dalber Ruben Sanchez, and Gastauer, Markus

Subjects
BIOGEOCHEMICAL cycles, RESTORATION ecology, IRON ores, IRON mining, IRON, BIOFILMS
Abstract

Introduction: The microbial-induced restoration of ferruginous crusts (canga), which partially cover iron deposits and host unique ecosystems, is a promising alternative for reducing the environmental impacts of the iron mining industry. Methods: To investigate the potential of microbial action to accelerate the reduction and oxidation of iron in substrates rich in hematite and goethite, four different microbial treatments (water only as a control - W; culture medium only - MO; medium + microbial consortium - MI; medium + microbial consortium + soluble iron - MIC) were periodically applied to induce iron dissolution and subsequent precipitation. Except for W, all the treatments resulted in the formation of biocemented blocks. Results: MO and MI treatments resulted in significant goethite dissolution, followed by precipitation of iron oxyhydroxides and an iron sulfate phase, due to iron oxidation, in addition to the preservation of microfossils. In the MIC treatment, biofilms were identified, but with few mineralogical changes in the iron-rich particles, indicating less iron cycling compared to the MO or MI treatment. Regarding microbial diversity, iron-reducing families, such as Enterobacteriaceae, were found in all microbially treated substrates. Discussion: However, the presence of Bacillaceae indicates the importance of fermentative bacteria in accelerating the dissolution of iron minerals. The acceleration of iron cycling was also promoted by microorganisms that couple nitrate reduction with Fe(II) oxidation. These findings demonstrate a sustainable and streamlined opportunity for restoration in mining areas. [ABSTRACT FROM AUTHOR]

Published
2024
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16. Source and background threshold values of potentially toxic elements in soils by multivariate statistics and GIS-based mapping: a high density sampling survey in the Parauapebas basin, Brazilian Amazon

Author

Sahoo, Prafulla Kumar, primary, Dall’Agnol, Roberto, additional, Salomão, Gabriel Negreiros, additional, da Silva Ferreira Junior, Jair, additional, da Silva, Marcio Souza, additional, Martins, Gabriel Caixeta, additional, e Souza Filho, Pedro Walfir Martin, additional, Powell, Mike A., additional, Maurity, Clovis Wagner, additional, Angelica, Rômulo Simões, additional, da Costa, Marlene Furtado, additional, and Siqueira, José Oswaldo, additional

Published
2019
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