Revista Eletrônica em Gestão, Educação e Tecnologia Ambiental

Applicability of remote sensing technologies in the detection and mapping of prosopis spp species: a systematic review

2025-09-11T19:59:13-03:00

Remote sensing plays a crucial role in the detection of invasive alien species. This study aimed to explore and present the existing literature on the use of remote sensing technologies for the detection of invasive Prosopis spp canopies in semiarid environments over a long period. A total of fifty studies spanning twelve years were analyzed using the Google Scholar and Science Direct databases, with the help of the ResearchGate social network of researchers and Excel software for data visualization, including word clouds and other graphical representations. The research carried out between 2017 and 2021 witnessed a significant increase in the application of geotechnologies such as Sentinel, LiDAR and hyperspectral images. Vegetation indices, including the Normalized Difference Vegetation Index (NDVI), were widely used. Africa emerged as the continent with the highest level of concern regarding the species discussed, which is evident from the publication of 28 studies. The data revealed that Prosopis juliflora showed greater invasive potential in America and Asia. However, African countries, including Kenya, Ethiopia, Somalia and Sudan, faced a high risk of invasion. The terms found most frequently in the analysis were Prosopis and juliflora. It is essential to prioritize research focused on the application of remote sensing geotechnologies, especially in semiarid regions, to enable informed decision-making by government environmental agencies in relation to the management and control of these invasive species.

Correlations between biogas and dissolved methane generated and physical-chemical parameters of sewage in modified full-scale UASB-type reactors

2025-09-11T19:59:07-03:00

Anaerobic technology is widely used in Brazil for the treatment of domestic sewage, due to favorable conditions such as a hot climate and lower operational costs. In this process, by-products such as biogas are formed, which can be recovered and converted into energy. Accordingly, the present study aimed to report the correlations between biogas production—both in gaseous and dissolved forms—and domestic sewage parameters, using full-scale modified UASB-type reactors installed in Curitiba, Paraná. Measurements were performed in real time over five months. The monitored influent and effluent parameters included pH, temperature, alkalinity, acidity, TSS, VSS, FSS, COD, sulfate, dissolved methane, and flow rate. Biogas parameters included flow rate and the concentrations of methane, carbon dioxide, and hydrogen sulfide. To assess the relationships between variables in the gaseous and liquid phases, Spearman’s correlation tests were applied. Operational results showed low removal efficiencies for BOD, COD, and TSS, attributed to the open design of the three-phase separator in this type of reactor. Most of the correlations between influent and effluent sewage parameters and biogas flow were moderate and positive, indicating that as biogas flow increased or decreased, these parameters tended to follow the same trend. However, correlations between sewage parameters and dissolved methane concentrations were weak or statistically non-significant, suggesting the need for further studies to better understand the influencing factors behind this relevant but often overlooked methane fraction.

Estufas e vermicompostagem: um facilitador do processo de ensino e aprendizagem

2025-09-11T19:59:11-03:00

A integração entre componentes curriculares e um artefato educacional, uma estufa de hortaliças com vermicompostagem, visa melhorar o processo de ensino-aprendizagem e fomentar a interdisciplinaridade na educação escolar. Com uso do método Design Science Research (DSR), foram identificadas rotinas para diferentes cursos, como Agronomia, Química e Tecnologia em Gestão de Turismo, ao relacionar o conteúdo programático com os elementos da estufa. O estudo foi conduzido em uma instituição de ensino, onde foram mapeados os componentes curriculares de diversos cursos e suas possíveis conexões com o artefato proposto. Como resultado, foram identificadas 23 rotinas para o curso de Agronomia, 2 para Análise e Desenvolvimento de Sistemas, 3 para Química, 2 para Tecnologia em Gestão de Turismo, 5 para Ciências Biológicas, 6 para o Técnico em Agropecuária Integrado ao Ensino Médio, 1 para o Técnico em Informática Integrado ao Ensino Médio e 5 para o Técnico em Alimentos Integrado ao Ensino Médio. Essa abordagem propõe uma forma prática de ensino, pois possibilita aos alunos uma experiência direta com os conceitos aprendidos em sala de aula. Essa estratégia não só promove a compreensão dos conteúdos, mas também prepara os estudantes para enfrentar desafios complexos no mercado de trabalho, ao estimular uma formação mais holística e interdisciplinar. O estudo destaca a importância de buscar benefícios educacionais através da integração entre ensino, pesquisa e extensão, ao possibilitar o avanço do conhecimento prático em um determinado campo de estudo.

The arrival of offshore wind farms on the coast of Rio Grande do Norte and potential socio-environmental conflicts

2025-09-11T19:59:10-03:00

Offshore wind generation has aroused the interest of various sectors and entities in Brazil, mainly because of its high capacity to generate energy within the energy transition scenario. After IBAMA issued the Terms of Reference for the Environmental Impact Study, the number of registered projects increased significantly. Although there are no offshore wind farms installed in Brazil, onshore generation stands out, especially in the state of Rio Grande do Norte, whose region is characterized by high wind speeds. Despite the increase in energy generation associated with offshore wind farms, the arrival of new developments could trigger socio-environmental conflicts in the marine space already occupied by various activities. The main conflicts identified are dealt with in this paper, namely: limitation of areas for artisanal fishing, alteration of the natural landscape, damage to tourist and sporting activities, limitations on maritime travel and risks to biodiversity. The analysis of these potential conflicts indicates the need to implement Marine Spatial Planning (MSP) and increase investment in biodiversity studies in order to analyze the main environmental impacts of offshore wind farms within the Brazilian context.