Flávio Castro da Silva
@uff.br
Scopus Publications
- A geo-approach to mechanized agricultural expansion in a tropical region: a case study in Rio de Janeiro
Gabriel Brazo Sabino da Silva, Flávio Castro da Silva, Andre Luiz Belem
Boletim De Ciencias Geodesicas, 2025
Advances in geoprocessing techniques and geospatial data manipulation have optimized natural resources and enhanced environmental services globally. The agricultural sector, traditionally associated with intensive land use, is now benefiting from these technologies, leading to improved productivity aligned with better environmental conditions. Mechanization in agriculture is crucial for optimizing processes like soil preparation, planting, and harvesting. This study introduces a geoprocessing-based methodology to create a mechanization index for agricultural production by integrating land slope, land use, and soil classes using Digital Elevation Models (DEMs) and publicly available spatial data. Applied in Rio de Janeiro State, Brazil, a region with diverse altimetry and land use, this workflow uses open-source tools (QGIS) and Python. The results highlight the potential for expanding mechanizable areas and can guide public and private initiatives. Suitability for mechanization was determined for 7936.82 km², or 18.12%, and 5720.84 km², representing 13.06% of Rio de Janeiro’s territory, depending on, respectively, SRTM and RJ25 data resolution and accuracy. - Agroindustrial wastewater: recent advances and perspectives on the use of constructed wetlands
Agronomy Research, 2025 - Nitrogen use efficiency in marandu Palisadegrass (Urochloa brizantha) during dry seasons in Rio De Janeiro, Brazil
Mariana Vezzone, Thamires Bernardo, Arthur Merat, João Paulo Felizardo, Marcelo Costa Muniz, et al.
Journal of Plant Nutrition, 2025 - Viability of renewable energy integration in isolated systems in Brazil – A case study at Trindade Island (Espírito Santo, Brazil)
Andrey Dias Feio, Flávio Castro da Silva, Marcos Alexandre Teixeira, Ana Caroline Lopes Maria, Gabriel Brazo Sabino da Silva
Renewable Energy, 2024 - Technological characterization of pet—polyethylene terephthalate—added soil-cement bricks
Tulane Rodrigues da Silva, Daiane Cecchin, Afonso Rangel Garcez de Azevedo, Izabella Valadão, Jonas Alexandre, et al.
Materials, 2021
The ever-growing consumption and improper disposal of non-biodegradable plastic wastes is bringing worrisome perspectives on the lack of suitable environmentally correct solutions. Consequently, an increasing interest in the circular economy and sustainable techniques is being raised regarding the management of these wastes. The present work proposes an eco-friendly solution for the huge amount of discarded polyethylene terephthalate (PET) wastes by addition into soil-cement bricks. Room temperature molded 300 × 150 × 70 mm bricks were fabricated with mixtures of clay soil and ordinary Portland cement added with up to 30 wt.% of PET waste particles. Granulometric analysis of soil indicated it as sandy and adequate for brick fabrication. As for the PET particles, they can be considered non-plastic and sandy. The Atterberg consistency limits indicated that addition of 20 wt.% PET waste gives the highest plasticity limit of 17.3%; moreover, with PET waste addition there was an increase in the optimum moisture content for the compaction and decrease in specific weight. Standard tests showed an increase in compressive strength from 0.83 MPa for the plain soil-cement to 1.80 MPa for the 20 wt.% PET-added bricks. As for water absorption, all bricks displayed values between 15% and 16% that attended the standards and might be considered an alternative for non-structural applications, such as wall closures in building construction. - Production and characterization of diesel mixtures with corn oil biodiesel
Marcel Lúcio Hyppolito, Luan Alves de Souza, Ivênio Moreira da Silva, Flávio Castro da Silva, Laurênio Ferreira Lopes
Revista Em Agronegocio E Meio Ambiente, 2021
A demanda global de energia aumentou significativamente e as nações passaram a depender do petróleo como a principal fonte energética. No entanto, o uso desta matéria-prima tende a apresentar limitações em relação à disponibilidade a longo prazo. Dessa forma, o estudo de diferentes matérias-primas para a produção de combustíveis renováveis é de grande importância. O presente trabalho teve como objetivo a produção de biodiesel de milho e o estudo das características físico-químicas das misturas diesel-biodiesel nas proporções de 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80% e 90%. O biodiesel foi produzido por rota metílica, utilizando hidróxido de sódio (NaOH) como catalisador. A transesterificação ocorreu sob agitação magnética, sendo respeitada a proporção de 6 mols de álcool metílico para 1 mol de óleo vegetal, 1% de NaOH na base volumétrica e tempo de agitação de 60 minutos. Observou-se aumento da massa específica e viscosidade cinemática em relação à proporção de biodiesel nas misturas. Os resultados indicaram que a produção de biodiesel a partir de óleo de milho obteve rendimento médio satisfatório de 94,29% e que apenas as misturas diesel-biodiesel B10, B20, B30, B40 e B50 apresentaram massa específica e viscosidade cinemática em padrões concordantes com a norma. - Soil fertility and essential oil production in citronella cultivation irrigated with dairy cattle wastewater (DCW)
Tropical and Subtropical Agroecosystems, 2021 - History, present and productive performance of agriculture in Rio de Janeiro
Elton de Oliveira, Adriana Maria de Aquino, Renato Linhares de Assis, Luan Alves de Souza, Flávio Castro da Silva
Historia Ambiental Latinoamericana Y Caribena, 2021
Simultaneamente, em uma mesma época dos anos 1800, duas políticas ligadas à exploração da terra, deram início ao processo de formação da agricultura, nas regiões montanhosas do estado do Rio de Janeiro. Com objetivo de contextualizar historicamente o desenvolvimento da agricultura fluminense e avaliar o seu desempenho produtivo, foram realizadas uma pesquisa na literatura e uma análise de dados quantitativos da atual produção agrícola. Verificou-se que o desenvolvimento desta atividade foi gerado dentro de uma diversidade de ambientes, pessoas, espécies vegetais, estratégias, políticas e situações econômicas que contribuiu para moldar a sua conformação atual, com características, dinâmica agrária e desempenho, diferenciados. Foi identificado que as regiões serrana e sul, apresentaram os maiores faturamentos por hectare e, também, os municípios com maior diversidade produtiva. - Main parameters that influence the composting process
Revista Brasileira De Meio Ambiente, 2020 - Characterization of materials used in the manufacture of ceramic tile with incorporation of ornamental rock waste
M. Barbari, C. M. Hüther, J. Alexandre, F. C. Silva, A. Azevedo, et al.
Agronomy Research, 2020
The production of ceramic tiles, such as tiles, has a great environmental impact, either in the extraction of natural raw materials or gas emissions in the burning stages. The use of industrial solid waste in ceramic materials can contribute to the reduction of these impacts, according to the characteristics of solid waste and its interaction with ceramic materials in the processing steps. Thus, this study aimed to characterize the materials needed to make a ceramic tile with incorporation of ornamental rock waste (ORW), thus evaluating its main characteristics regarding the feasibility of this incorporation. The physical characterization of the clays used in the production of ceramic artifacts was performed, and for the waste the mineralogical analyzes were performed, through x-ray diffraction (XRD), microstructure analysis from confocal optical microscopy, after sintering the prototypes and chemical analysis by X-ray spectroscopy (EDX). Soon after the raw materials went through the step of conformation and preparation of the prismatic specimens by the process of extrusion of the ceramic mass, with an incorporation of the ORW in 0% and 15% of the ceramic mass, for its subsequent The prototypes were sintered at three different temperatures (850 °C, 950 °C and 1,050 °C). The specimens were submitted to technological tests of mechanical resistance, water absorption, firing shrinkage and porosity to evaluate the incorporation viability. The results indicated the presence of quartz particles in all raw materials, and also that the clays of the study region are predominantly kaolinitic. The presence of these materials in the ceramic masses directly influences the micrographs, because they result in the formation of liquid phase, inert particles that can turn the site into a stress concentration point and when incorporated in the ORW the specimens met the technical specifications of the Brazilian standard for application on ceramic tiles. The results found in the technological tests carried out, that the incorporation of 15% of ornamental rock waste in both clays did not affect the tile properties, indicating the feasibility of incorporating this waste in civil construction, minimizing the impacts generated. - Quantification and qualification of exhaust gases in agricultural diesel engine operating with biodiesel mixtures
Flávio C. da Silva, Felipe N. Aranha, Gerd B. Angelkorte, Juan F. H. Guardiola, Luciana P. Teixeira, et al.
Revista Brasileira De Engenharia Agricola E Ambiental, 2019 - Use of classifier to determine coffee harvest time by detachment force
Murilo M. de Barros, Fábio M. da Silva, Anderson G. Costa, Gabriel A. e S. Ferraz, Flávio C. da Silva
Revista Brasileira De Engenharia Agricola E Ambiental, 2018 - Comparison between the soil chemical atributes sampled conventionaly and in grid
Gabriel Araújo e Silva Ferraz, Fábio Moreira da Silva, Marcelo Silva de Oliveira, Flávio Castro da Silva, Luis Carlos Cirilo Carvalho
Coffee Science, 2017 - Meteorological variables and soil moisture in the detachment force coffee fruit
Flávio Castro Da Silva, Fábio Moreira Da Silva, Ronan Souza Sales, Gabriel Araújo e Silva Ferraz, Murilo Machado De Barros
Coffee Science, 2017 - Methodology to determine the soil sampling grid for precision agriculture in a coffee field
Gabriel Araújo e Silva Ferraz, Marcelo Silva De Oliviera, Fábio Moreira Da Silva, Rogner Carvalho Avelar, Flávio Castro Da Silva, et al.
Dyna Colombia, 2017 - Correlation detachment coffee force fruit under different conditions nutrition
Coffee Science, 2016 - Demanda energética de diferentes manejos de solo no cultivo de milho
Joao Paulo Barreto Cunha, Alessandro Torres Campos, Felipe Gabriel Lorenzoni Martins, Vanderson Rabelo de Paula, Eduardo Silva Volpato, et al.
Bioscience Journal, 2015 - Doses of noise to whom are subject operators portable harvester coffee
Coffee Science, 2015 - Evaluation of a variable rate fertilizer application system adapted to coffee crop
Coffee Science, 2015 - Efficiency of coffee mechanical and selective harvesting in different vibration during harvest time
Coffee Science, 2015 - Spatial variability of the detachment force of coffee fruit
Gabriel A. e S. Ferraz, Fábio M. da Silva, Marcelo S. de Oliveira, Flavio C. da Silva, Rafael de L. Bueno
Engenharia Agricola, 2014 - Spatial variability of the noise generated by a portable harvester in a coffee field
Coffee Science, 2013 - Soil penetration resistance in coffe plantations cultivated with mechanized and manual systems
Coffee Science, 2013 - Spatial variability of soil physical attributes and agronomic characteristics of coffee crop
Coffee Science, 2013 - Operacional performance of mechanically harvested coffee and selectivity in accordance to force detachment of fruit
Coffee Science, 2013
