Boletim do Observatório Ambiental Alberto Ribeiro Lamego
The Boletim do Observatório Ambiental Alberto Ribeiro Lamego (BOAARL) is a semiannual scientific publication of the Master Program in Environmental Engineering of the Fluminense Federal Institute of Education, Science and Technology (IFFluminense), which aims to publish original contributions to support the decision in the environmental field, debating issues related to environmental problems and conflicts existing in the world and in Brazil. The most interesting topics of the Journal are: "Environmental Assessment, Management and Conservation", "Environmental Assessment and Geotechnologies", "Management and Planning of Specially Protected Territorial Spaces", "Water Resources Management and Planning", "Development, Sustainability and Innovation ”,“ Energy Conservation and Renewable Energy ”,“ Environmental Management of Cities, Waste and Effluent Management ”and“ Environmental Technologies and Industrial Innovation ”among other related topics. BOAARL ​​also publishes review articles. From v.9 n.1, the magazine was available exclusively in electronic format online in Open Access. It publishes, after the peer review process, unpublished contributions in Portuguese, Spanish and English. This journal does not charge authors or their institutions fees for the submission, processing and publication of articles.
Instituto Federal de Educação, Ciência e Tecnologia Fluminense
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O Boletim do Observatório Ambiental Alberto Ribeiro Lamego é um periódico de publicação científica do Programa de Pós-graduação em Engenharia Ambiental do IFFluminense e publicamos artigos de revisão e comunicação científica dos temas: "Avaliação, Gestão e Conservação Ambiental”, “Avaliação Ambiental e Geotecnologias”, “Gestão e Planejamento de Espaços Territoriais Especialmente Protegidos”, “Gestão e Planejamento de Recursos Hídricos", "Desenvolvimento, Sustentabilidade e Inovação”, “Conservação de Energia e Energias Renováveis”, “Gestão Ambiental das Cidades, Gerenciamento de Resíduos e Efluentes” e “Tecnologias Ambientais e Inovação Industrial" e áreas correlatas.
Avaliação, Gestão e Conservação Ambiental
Copyright (c) 2025 José Augusto Ferreira da Silva, Jader Lugon Junior http://creativecommons.org/licenses/by/4.0
The Planetary Boundaries framework and the environmental impact studies: contributions to addressing the planetary ecological crisis
Despite the abundant evidence related to the intense environmental deterioration of the planet, we continue, daily, to emit high concentrations of carbon dioxide; to release high loads of many other pollutants into the atmosphere, hydrosphere and lithosphere; and, through these actions and many others, to interrupt the regeneration cycles of ecosystems. In this context and considering the importance of environmental impact studies as essential instruments for mitigating planetary environmental deterioration, this research seeks to demonstrate the importance of incorporating knowledge from studies on Planetary Boundaries when conducting environmental impact studies. To support the discussion, the article presents a summary of the knowledge that underlies and is present in the structure of Planetary Boundaries, a presentation that is followed by the identification of possible points of convergence or intersection between said structure and national legislation that discusses environmental impact studies. As a conclusion, the incorporation of studies related to the Planetary Boundaries structure when preparing environmental impact studies is advocated.
Copyright (c) 2025 Páulea Zaquini http://creativecommons.org/licenses/by/4.0
Life Cycle Assessment as an evaluation of the sustainable potential of the Light Wood Frame system from the perspectives of production, energy efficiency, and environmental impact.
This study investigates the sustainable viability of the Light Wood Frame system in tropical and subtropical regions, taking into account the production chain, energy efficiency and environmental impacts, surveying which criteria are used to assessment the sustainability of Light Wood Frame constructions. The methodology is based on a literature review, with searches in databases such as Science Direct, Scopus and Scielo, using specific keywords and applying the snowballing method to broaden the selection of relevant articles. The analysis includes an assessment of the sustainability of LWF through Life Cycle Analysis, considering energy consumption, CO₂ emissions and durability of the treated wood according to recent Brazilian Association of Technical Standards. The results indicate that, despite challenges related to humidity and wood preservation, Light Wood Frame has significant environmental advantages compared to traditional systems, due to lower embedded energy, greater thermal insulation and reuse potential, reinforcing its relevance as a sustainable alternative for civil construction.
Copyright (c) 2025 Carolina Eyng, Ângela do Valle http://creativecommons.org/licenses/by/4.0
National solid waste policy: challenges and opportunities in sustainable management in Guaratuba-PR
This article analyzes solid waste management in Brazil under the National Solid Waste Policy (PNRS), established by Law No. 12.305/2010, focusing on the municipality of Guaratuba, Paraná. The qualitative study combines a bibliographic review and a case study, addressing instruments such as shared responsibility, reverse logistics, and the inclusion of waste pickers. The findings indicate progress in public awareness and selective waste collection, but also highlight structural limitations, especially in managing the increase in waste during the high tourist season. It concludes that, despite advances, the effectiveness of the PNRS depends on greater intergovernmental coordination, investment in infrastructure, technological innovation, and ongoing environmental education.
Copyright (c) 2025 Rafael Burlani Neves, Patricia Inacio Custodio Rocha da Silva ; Joelson Correa Travassos http://creativecommons.org/licenses/by/4.0
Daylight analysis by INI-C: potential for integration in different methods
Buildings contribute to a significant portion of the energy expenditure in Brazil, with the artificial lighting system being one of their greatest demands in nonresidential buildings. Harnessing daylight, as long as it offers comfort to the user and is integrated with the artificial lighting system, is one of the best strategies to reduce energy consumption for lighting. Therefore PBE Edifica launched the INI-C in2022, that presents a recent instrument that allows the assessment of the integration between the two systems. The study focused in comparing the daylighting potential using the simplified and simulation methods of the INI-C, using the UFMG’s Engineering Library as a study case. Additionally, an investigation was carried out into how to ensure effective integration with the artificial lighting system using different normative bases. The simulation revealed a 27% greater potential for daylight integration compared to the simplified method. Despite this, the division of circuits for operating the luminaires, required by both methods, may not ensure the most efficient integration with artificial light, being necessary to create more awareness to the users.
Copyright (c) 2025 Larissa Arêdes Monteiro, Lucas Barbosa Prudente, Hugo de Araújo e Silva, Roberta Vieira Gonçalves de Souza http://creativecommons.org/licenses/by/4.0
Computer simulations as strategic tools in urban energy planning: A pedagogical approach in undergraduate education
This article discusses the pedagogical experience acquired in a 30-hour undergraduate module focused on simulations allied with urban energy planning. Areas of two Brazilian cities were studied using City Energy Analyst, a tool developed by ETH Zürich that addresses energy and urban aspects simultaneously. For the simulations, one of the program's original databases designed for hot countries, called SG, and the newly created Brazilian database (BR), a product of a Master’s dissertation, were used. The students were introduced to Urban Energy Planning and simulations, with a practical application of BR. The module presented a theoretical-practical approach as its methodology. Test simulations with CEA and the explanation of relevant concepts were done. Simulations on energy demand and potential energy sources were conducted, with results presented to an ETH Zürich researcher. It is concluded that the module achieved its educational goals, assessing the potential of BR and CEA in Brazil.
Copyright (c) 2025 Ingrid Stephanie de Morais, Rejane Magiag Loura http://creativecommons.org/licenses/by/4.0
Waste management in chemistry laboratories: a systematic review of practices adopted in educational institutions
The management of chemical waste in academic laboratories presents a growing challenge due to the expansion of experimental activities, the diversity of substances involved, and the managerial and budgetary limitations faced by many institutions. This study aims to understand the main difficulties and challenges in managing chemical waste generated in chemistry laboratories at educational institutions. To achieve this goal, a systematic literature review was conducted following the PRISMA protocol. A total of 19 articles were selected and analyzed, resulting in the classification of findings into three main categories. The reviewed studies reveal an increasing concern regarding the proper disposal of chemical waste, highlighting the relevance of institutional policies, educational programs, and sustainable practices. Although the articles addressed various aspects of waste management, there is a notable lack of publications focused specifically on the reality of chemistry laboratories, indicating a need for further research. Nonetheless, the findings make a significant contribution to the advancement of knowledge in the field and provide a foundation for the development of more effective guidelines. Proper chemical waste management in educational settings requires the integration of technical, educational, and administrative aspects to foster safer, more responsible, and sustainable academic environments.
Jéssica Fabiane Faria Alves Santos Netto
Copyright (c) 2025 Jéssica Fabiane Faria Alves Santos Netto, Marcos Antonio Cruz Moreira, Gabriel de Pinna Mendez, Jose Augusto Ferreira da Silva, Fernando Rufino de Barros http://creativecommons.org/licenses/by/4.0
Resilient and self-sufficient hospitals: an analysis of the integration between emerging technologies and sustainability
In the face of global challenges arising from environmental degradation and climate change, it has become essential to rethink the way hospitals are designed, constructed, and operated, seeking sustainable and resilient solutions that minimize environmental impacts without compromising the quality of care. This study aims to discuss how the integration of emerging technologies and sustainability principles can contribute to the development of resilient and self-sufficient hospitals of the future. The research comprises a literature review conducted in the Web of Science and Scopus databases, as well as a theoretical case study of the Al Daayan Health District, located in Doha, Qatar. The project exemplifies key strategies for planning sustainable, resilient, and self-sufficient hospital facilities. It is anticipated that future hospitals will integrate emerging technologies, sustainability, and resilience principles to address global challenges, ensuring operational efficiency and the quality of healthcare delivery across diverse contexts.
Copyright (c) 2025 João Paulo Lucchetta Pompermaier, Elza Maria Alves Costeira, Patrícia Biasi Cavalcanti http://creativecommons.org/licenses/by/4.0
Public-Private Partnerships in the Redevelopment of Public Leisure Spaces: The Costa Azul Park
The aim of this study was to analyze the changes that have taken place in Arlindo Francisco Philippi Square (Law nº 6562/2004), in Florianópolis, SC – known as Costa Azul Park – as a result of private investment, investigating their impact on the use and appropriation of public space. This qualitative research involved the following data collection procedures: document analysis, field surveys and observations, and semi-structured on-site interviews. The park has consolidated itself as a relevant leisure space within the municipality and the surrounding conurbation, given the fact that ten (10) of the seventeen (17) interviewees did not know the space before the revitalization and that five (5) interviewees lived in the neighbouring municipality. More than half of the interviewees, and above all all those who knew the area before the revitalization, identified improvements in its infrastructure and safety, which in turn had an impact on the appropriation of the place by a larger and more diverse public due to the greater diversity of facilities on offer. Less than half of those interviewed saw the revitalization's influence on real estate appreciation, and few were aware of the public-private partnership that allowed the space to be revitalized.
Copyright (c) 2025 Isabela Guesser Schmitt, Lara Lima Felisberto, Liriane Baungratz, Maiara Baldissarelli, Vanessa Casarin http://creativecommons.org/licenses/by/4.0
Remote Monitoring of Temperature in Sea Turtle Nests Using IoT and LoRaWAN Technologies: A Case Study in the Caruara Reserve
Sea turtles are extremely important for marine and coastal ecosystems, performing several ecological functions that help maintain environmental balance. The conservation of these animals is crucial due to the threats they face, especially from climate change. Incubation temperature is a determining factor for the sex of the hatchlings, which makes precise monitoring of nest temperature a fundamental tool for implementing effective management strategies. This study presents a remote temperature monitoring system for sea turtle nests, using IoT and LoRaWAN, implemented at the Caruara Reserve in partnership with the Tamar Project. The purpose was to validate the technology and obtain continuous thermal data. The system monitored one nest for 38 days non-invasively, transmitting and recording data in real-time. The results indicate the system's effectiveness. Temperatures ranged from 30.5°C to 34.0°C, with a low daily amplitude (average of 0.8°C). These values, falling within ranges often associated with feminization in several sea turtle species, suggest a high potential for female-biased clutches, highlighting the importance of accurate data to inform adaptive management strategies.
Copyright (c) 2025 Thiago Rodrigues Faria, Vicente de Paulo Santos de Oliveira, Jader Lugon Junior, Thiago Moreira de Rezende Araújo , Tatiane Bittar Vieira, William da Silva Vianna http://creativecommons.org/licenses/by/4.0
Technological routes for decarbonization of heavy vehicles: perspectives and challenges
This article explores the main technological pathways aimed at decarbonizing heavy-duty road freight transport in Brazil, a sector considered hard to abate due to its high dependence on fossil fuels and complex logistics. Through a narrative literature review, the study analyzes alternative energy sources such as biodiesel, biomethane, compressed natural gas, renewable diesel, hydrogen, and electrification, assessing their mitigation potential, technical challenges, and economic feasibility. It also examines Brazil’s strategic position, given its well-established public policies, including RenovaBio, the National Renewable Diesel Program, and the Future Fuel Law. The findings highlight that a successful energy transition in this sector requires a multi-technological approach, tailored to regional realities and supported by regulatory incentives, technological innovation, and adequate infrastructure. The article concludes that coordinated action among government, industry, and academia is essential to build a cleaner, more resilient, and equitable mobility system.
Copyright (c) 2025 Luciara Queiroz, Vicente de Paulo Santos de Oliveira, Luiz de Pinedo Quinto Junior http://creativecommons.org/licenses/by/4.0
Analysis of the feasibility of electricity generation from biogas produced in wastewater treatment plants
Amidst the global discussion on reducing greenhouse gas emissions (GHG) and the energy transition to renewable sources, it is crucial to consider the use of all available energy sources. This study aims to evaluate the technical, economic and environmental feasibility of generating electricity from biogas from sewage treatment plants (STPs). To this end, a systematic literature review technique was used. This study sought to evaluate the use of biogas, which can be an important energy source, but is still little used today. The literature review indicated that, although there is technical feasibility, the high costs of implementing a plant to use biogas for energy in STPs limit its economic feasibility, being viable mainly in STPs that treat large volumes of sewage, with flows greater than 4.1 m³/s, for example. With flows of this size, the energy use of biogas has the potential to generate approximately 11 million kWh/month, allowing a return on investment applied to the plant in approximately 4 years.
Copyright (c) 2025 Vinícius da Silva Ferreira Pereira, Gabriel de Pinna Mendez, Augusto Eduardo Miranda Pinto http://creativecommons.org/licenses/by/4.0
Delimitation and morphometric analysis of the Ribeirão Santo Antônio basin in the municipality of Miracema/RJ
The use of geotechnologies for watershed delineation and morphometric characterization enables the integrated analysis of various types of data, playing a fundamental role in supporting decision-making, especially in the context of environmental planning. The compactness coefficient of 1,8378 and the form factor of 0,2918 indicate an elongated shape. The mean overland flow length of 0,0902 suggests that the watercourses are relatively short, while the drainage density of 2,7721 km/km² indicates a well-developed drainage network. The analysis of these parameters suggests that, although the basin’s shape would typically result in longer response times, the short channels and well-developed drainage network may accelerate the response to precipitation events. This study provided relevant information about the Ribeirão Santo Antônio watershed, offering data that can contribute to the improvement of water resource management in the municipality of Miracema/RJ.
Sistema de Informações Geográficas (SIG)
Copyright (c) 2025 Débora Ferreira Magdaleno, Vicente de Paulo Santos de Oliveira, Leonardo Bernardo Campaneli da Silva http://creativecommons.org/licenses/by/4.0
Urban waters of Carapebus‑RJ: problems and potentialities
Landscape planning and the integration of open space systems are essential for more sustainable and equitable cities. This study focuses on water bodies and their importance in urban structuring, with a focus on the city of Carapebus, in the state of Rio de Janeiro. Landscape planning organizes land use and natural resources, seeking a balance between environmental preservation and human needs. This involves analyzing topography, vegetation, hydrography, and biodiversity, as well as the socioeconomic and cultural aspects of the population. The methodology adopted is based on Landscape Reading. Hand-drawn maps were used to detail urban growth, biogeophysical support, flood vulnerability, and the location of Public Open Spaces. The study also involved the use of QGIS software. Researchers identified three main areas in the urban zone. The analysis considered five regions, which were delimited due to similar and contiguous challenges and opportunities. Alternatives were suggested for the integration of environmental and historical protection, aiming at the preservation of the FMP, as well as the creation of a Municipal Ecological Park and a Linear Park.
Copyright (c) 2025 Camilla Soares da Silva, Maxuel Bernades Donato, Fernanda de Abreu Pereira, Luiza Célia dos Anjos Julião, Ísis Simões, Alan Rene Lopes Neves, Marcelly Adão Oliveira, Danielly Cozer Aliprandi, Daniela Bogado Bastos de Oliveira http://creativecommons.org/licenses/by/4.0
Survey of methods to assess the impact of litter on coastal lagoons in the municipality of Rio das Ostras
Coastal lagoons are areas of natural drainage for rainwater, are part of coastal ecosystems and are an attraction for recreational activities. The proximity of coastal lagoons to urban centers causes these ecosystems to be highly impacted. In the municipality of Rio das Ostras mass tourism in these areas causes environmental degradation. This work carried out a bibliographic review with the aim of defining the most appropriate methods for surveying the impact of waste in the coastal lagoons of Rio das Ostras. Methods are compared and a favorable conclusion is drawn regarding a method used in the coastal lagoons of the Baltic Sea.
Copyright (c) 2025 Jacqueline Gatti Moreira, Luis Felipe Umbelino dos Santos, Sávio Martins Lopes, Marcos Antonio Cruz Moreira http://creativecommons.org/licenses/by/4.0
Rainfall characterization in the southern portion of the IX Hydrographic Region of the state of Rio de Janeiro
This study aims to analyze the rainfall characteristics in the southern portion of Hydrographic Region IX (State of Rio de Janeiro) with a focus on the Imbé and Macabu watersheds. For this purpose, daily precipitation data from the meteorological station of the National Water and Sanitation Agency (ANA), located in Trajano de Morais/RJ, from January 1990 to June 2024 were used. In the comparative analysis, data from September 2023 to February 2024 were used from the simplified station located in the Águas Claras I and II Private Natural Heritage Reserves’ headquarter, in Conceição de Macabu/RJ. With the data from the ANA station, five climate indices based on precipitation data were applied. To detect statistically significant trends, the nonparametric Mann-Kendall statistical test was used. The magnitude of the trends was obtained by the Sen estimator. The results indicate that although the stations present similar rainfall characteristics in some aspects, there are differences in the intensity and distribution of rainfall. In the trend analysis of the climate indices of the data from the ANA station, in general, an increase in precipitation was observed in the Imbé river watershed region.
Copyright (c) 2025 Gildo Rafael Almeida Santana, Maria Inês Paes Ferreira, Elias Fernandes de Sousa, Rose Angela Hilda Wanzeler Braga http://creativecommons.org/licenses/by/4.0
Water and rainfall analysis of dry periods in the municipality of Campos dos Goytacazes – RJ
Campos dos Goytacazes is a municipality in the north of Rio de Janeiro with rainfall characterized by periods of excess precipitation and prolonged droughts, presenting irregular episodes of rainfall distribution in recent years. The analysis of dry periods is essential to understand the climate patterns that affect the region, especially in the current climate change scenario. Studies show that more frequent and prolonged droughts can impact water availability and quality. Therefore, the present work aims to carry out a hydro-rainfall analysis of dry periods (corresponding between the months of April and September) in the municipality between the years 2019 and 2024. From the data collected, it becomes evident the importance of understanding the distribution and intensity of dry periods to support the formulation of public policies for water resource management, strengthening the region's ability to adapt to climate change.
Copyright (c) 2025 Leandro Rezende Corteze Freitas, Antônio Ivo Gomes Barbosa, Afonso Rangel Garcez de Azevedo, Eduardo Manuel Rosa Bulhões http://creativecommons.org/licenses/by/4.0
Physiographic characterization of the Pomba River watershed in the municipality of Santo Antônio de Pádua - RJ
The present work aims to analyze the physiographic indexes of Pomba River in the city of Santo Antônio de Pádua, located in the Southeast Atlantic Region of the IX Hydrographic Basin – Lower Paraíba do Sul and Itabapoana, known as the Northern Fluminense Region. The methodology includes maps and physiographic indexes such as basin area, main river length, slope, form factor, drainage density, and, finally, concentration time. In this sense, calculations and classifications based on various authors were applied. The results indicate that the region, according to the form factor, has an average tendency to floods and, according to the drainage density, low surface runoff and greater infiltration. Therefore, Pomba River basin in Santo Antônio de Pádua presents characteristics that directly influence surface runoff. Furthermore, water resource management is fundamental for the environmental and urban planning of the region.
Copyright (c) 2025 Marcio Lopes Gevegy, Vicente de Paulo Santos de Oliveira, Jefferson Luis Melo de Almeida Gomes, Wagner Rambaldi Telles http://creativecommons.org/licenses/by/4.0
Titanium dioxide for the degradation of the pesticide Difenoconazole: synthesis, modification, and photocatalysis
Titanium dioxide (TiO₂) photocatalysis has proven to be a promising alternative for the degradation of pesticides, including difenoconazole, contributing to the mitigation of environmental impacts caused by the use of agrochemicals. The aim of this study was to evaluate the performance of TiO₂-based photocatalysts in the photodegradation of the fungicide difenoconazole. TiO₂ synthesis was carried out via the sol-gel route, with hydrothermal treatment (HTT), and different temperature conditions (160°C to 250°C) and treatment times (2h to 4h) were evaluated. The results indicated that the TiO₂ catalyst treated at 160°C for 2 hours showed the best performance in the degradation of difenoconazole. Regarding the pH of the solutions, acidic (pH 2) and neutral (pH 7) environments were more effective for pesticide degradation, which can be attributed to the favorable interaction between TiO₂ and the fungicide at these pH levels, where the material’s surface charge enhances adsorption and photodegradation. Concerning TiO₂ modification with transition metals, doping with Fe resulted in a significant increase in photocatalytic activity, surpassing doping with Ni and Cu.
Copyright (c) 2025 Carollayne Novaes de Sa, Rafaela Vitória Silva de Souza, Siloé Gonçalves Fernandes, Patricia Corradini http://creativecommons.org/licenses/by/4.0
Gestão e Planejamento de Recursos Hídricos
Evaluation of the physicochemical properties of bioleachate from organic waste and its potential in the germination of Lactuca sativa Seeds
The bio-slurry, also known as organic leachate, percolated liquid, and lixiviated liquid, is a byproduct of composting and, at various concentrations, can be used as a biofertilizer. It serves as an alternative source to synthetic fertilizers, which cause environmental impacts and are widely used in Brazil. The use of biofertilizers promotes sustainable agriculture, benefits the ecosystem, improves soil structure, and supports the healthy development and growth of crops. This study aims to identify the physicochemical and microbiological properties of leachate obtained through the mechanized composting of cooked and uncooked organic food waste and pruning residues. Laboratory analysis results of the bio-slurry will be evaluated based on physicochemical and microbiological parameters governed by standards, laws, and literature, as well as its nutritional value as a biofertilizer.Keywords: Biofertilizer. Composting. Slurry
Copyright (c) 2025 Michele de Siqueira Ramos, Dinarte Cleiton Borges Santos, César Luis Siqueira Junior, Marcos Antonio Cruz Moreira http://creativecommons.org/licenses/by/4.0
Evaluation of the salinization process in the rural area of the municipality of São João da Barra, RJ
Coastal regions have been experiencing increased saline intrusion, causing ecological changes and problems for communities. São João da Barra is located in the north of the state of Rio de Janeiro and has been facing erosion and saline intrusion in the Paraíba do Sul river delta region and occasional interruptions in water supply due to high salinity. The region produces several varieties of fruits, vegetables and legumes with water collection in groundwater wells. The objective of this study was to evaluate salinity in 7 sampling points, 2 of them in a channel originating in the Paraíba do Sul river, 4 in surface waters and 1 in groundwater, in the rural area of ​​Atafona and Grussaí through the analysis of the parameters electrical conductivity, salinity, pH and concentration of the following ions: fluoride, chloride, nitrite, nitrate, bromide, phosphate, sulfate, sodium, magnesium, potassium and calcium. The results indicated that most of the samples were classified as brackish waters, presented high electrical conductivity and strong influence of chloride, potassium, magnesium, sodium and calcium ions and, therefore, have been undergoing the salinization process.
Saline Intrusion. Ions. Physico-Chemical Parameters.
Copyright (c) 2025 Juliana Parente Ribeiro, Carolina Ramos de Oliveira Nunes, Thiago Moreira de Rezende Araújo, Vicente de Paulo Santos de Oliveira http://creativecommons.org/licenses/by/4.0
Destruction of the atafona beach system: relationship between the decrease in the flow of the Paraíba do Sul River and local geomorphology
The Paraíba do Sul River, one of the most important watercourses in the Southeast region, flows through three states: São Paulo, Rio de Janeiro and Minas Gerais. Classified as a federal river, its management is carried out by the Paraíba do Sul River Basin Integration Committee (CEIVAP). Over the years, its flow has decreased due to projects such as transpositions, diversions of watercourses and reservoirs for power generation. One of the most obvious consequences of this reduction is the increase in the erosion process at the mouth of the river, in Atafona. The objective of this study is to analyze the flow of the Paraíba do Sul River basin, seeking to verify whether the decrease in flow is related to the increase in erosion on the Atafona beach. The methodology of the work is based on the analysis of studies already carried out on the subject, as well as on the monitoring of the flow of the river basin. We hypothesize that the reduction in river flow may have affected the transport and deposition of sediments in its lower course, contributing to the erosion process observed in Atafona. The results obtained through this analysis show that the reduction in flow has in fact accelerated the erosion process at the mouth.
Copyright (c) 2025 Letícia Cordeiro Menezes, Vicente de Paulo Santos de Oliveira, Jader Lugon Junior http://creativecommons.org/licenses/by/4.0
Water supply infraestructure in Tanguá: challenges for universalization and its impacts on public health
This study analyzes the challenges of universalizing access to drinking water in the municipality of Tanguá, in the state of Rio de Janeiro, based on a quantitative approach and using secondary data. The research reveals that a significant portion of the local population still faces difficulties in accessing drinking water, especially in rural and hard-to-reach areas. In addition, the study highlights the disparity between urban and rural regions with regard to sanitation infrastructure, showing that peripheral areas are the most affected. Indicators of access to water, quality of water supplied, and hospitalization rates due to waterborne diseases were analyzed. Based on the results, it is suggested that greater investments in infrastructure, more effective public policies, and new research, including the use of the IQA method and interviews with residents, are needed to improve the water supply in the municipality.
Drinking water. Water security. Water allocation
Copyright (c) 2025 Antônio Cláudio Moura Ferreira de Souza, Pedro Peixoto Gjorup, Anderson dos Santos Vidal, Vicente de Paulo Santos de Oliveira http://creativecommons.org/licenses/by/4.0
Implementation of the situation unit in response to heavy rains in Rio de Janeiro
The importance of a dedicated unit for assertive data communication to disaster response agencies has been widely discussed. This descriptive study reports the experience of implementing the Situation Unit (USIT) during the intense rains from November 2023 to March 2024 in Rio de Janeiro. A total of 96 events were recorded, with Flooding being the most prevalent, particularly in February, with Nova Iguaçu being the most affected municipality. The average number of displaced and homeless individuals was 109 and 2,037, respectively. After data processing, validation, and consolidation, agencies were able to revise their action plans and supply strategies for the most affected areas more efficiently. The USIT proved effective by integrating technology and real-time monitoring of socioeconomic resources, enhancing disaster management.
Nilda Carla Simões Franklin Guastini Grilo
Copyright (c) 2025 Marco Antonio Basques Sobrinho, Márglory Fraga de Carvalho, Nilda Carla Simões Franklin Guastini Grilo, Marcos Paulo Dias da Silva, Leandro de Souza Camargo http://creativecommons.org/licenses/by/4.0
Hydroracial scarcity in the metropolitan east of Rio de Janeiro: evidence of racial inequality in acess to treated water
The United Nations has recognized access to treated water and sanitation as an inalienable fundamental human right. In Brazil, the Sanitation Law and its recent update establish the universalization of basic sanitation as both a principle and goal to be achieved by 2033. However, millions of Brazilians remain excluded from this right, particularly the most vulnerable populations, including Black individuals. This research examines the correlation between areas lacking access to treated water services and the proportion of self-identified as Black or Brown individuals, based on data from the IBGE Census. The study focused on municipalities in the Metropolitan East of Rio de Janeiro where water services have yet to be universalized. The results reveal that areas with the highest proportion of white individuals are precisely those with the best coverage rates, highlighting the perpetuation of structural racism in the region. These findings underscore the ongoing challenges in promoting equality and equity in access to basic sanitation.
Copyright (c) 2025 Andreza Garcia de Gouveia, Ana Lucia Nogueira de Paiva Britto, Rosa Maria Formiga-Johnsson http://creativecommons.org/licenses/by/4.0
Embedded sensor platform for remote monitoring of water quality
Water quality is a critical parameter for public health, environmental preservation, and various industrial activities. Continuous monitoring of parameters such as turbidity, pH, temperature, and total dissolved solids (TDS) is essential to ensure that water meets the required standards for different uses. This paper describes the integration of commercial sensors in the implementation of a data acquisition system to monitor these parameters in a water body, using Arduino and NodeMCU V3 hardware platforms.
Copyright (c) 2025 Dalson Ribeiro Nunes, Marcos Antonio Cruz Moreira, Luis Felipe Umbelino dos Santos http://creativecommons.org/licenses/by/4.0
Use of anhydrous ethanol in gasoline and its environmental implications: a study in the Eastern Amazon
Gasoline is one of the most used fuels in Brazil. It is essential that it meets quality standards to avoid problems in motor vehicles and environmental impacts. In this context, the present research aimed to determine the appearance, color and anhydrous ethanol content in type C gasoline sold in the municipality of Macapá – AP. Eleven 1 L samples were collected and transported in appropriate containers to the natural sciences laboratory at Escola Estadual Mário Quirino da Silva. Collection took place from March to May 2024. The appearance and color of the samples were in accordance with current legislation (clear and free of impurities, yellow color). However, anhydrous ethanol levels in gasoline ranged from 25% to 30%, with two samples outside the legal limit of 27%. Therefore, our study reinforces the need for greater oversight and highlights the crucial role of the consumer in demanding fuel quality testing.
Copyright (c) 2025 Valfredson Victor Melo do Nascimento, Charles dos Santos Barros http://creativecommons.org/licenses/by/4.0
Technical high school education in the state of Rio de Janeiro and the confrontation of the ecological crisis
Despite the warnings issued about the serious consequences arising from the inappropriate use of natural resources since the 19th century, we reached the third decade of the 21st century using production models still based on the irrational exploitation of these resources. But if the warnings were not enough to carry out the necessary socio-productive changes, the intensification of adversities related to the socio-ecological crisis in the first quarter of the 21st century have been frightening populations in different territories of the planet. In this context, and with the aim of contributing to the organization and management of the provision of professional education courses in the state of Rio de Janeiro, this study presents data related to technical courses that registered enrollments in the Rio de Janeiro territory in the period 2019-2023 and which present, among their purposes, the training of workers committed to protecting the planet's ecosystems and qualified to face the consequences of the ecological crisis. The analyzes carried out demonstrated the non-existence or low number of enrollments in strategic courses, in addition to the low territorial capillarity of the offer, indicating an insufficient supply of these courses in the territory of Rio de Janeiro.
Copyright (c) 2025 Páulea Zaquini Monteiro Lima, Fernanda Cosme da Costa http://creativecommons.org/licenses/by/4.0
Public policy instrument for urban management for the transition to the circular economy in CONLESTE
The linear economy is based on the model of producing, consuming and generating waste with economic growth based on the exploitation of finite resources, and contributes to the formation of cities in crisis pressured by speculative capital and propagating various contaminants. In response, the circular economy stands out, which proposes economic growth dissociated from the use of finite resources without generating these contaminants. As a result of circularity, public policy instrument for urban management emerge to promote the redesign of territorial space. This article seeks to assess whether and how CONLESTE will be able to implement these urban management levers to introduce and promote the circular economy in its regional territory based on the provisions of ENEC. It is expected that the results achieved by this work will be useful in disseminating debates on the transition to circularity with the recovery of the human dimension for cities.
Copyright (c) 2025 Marcos Paulo Marques Araujo http://creativecommons.org/licenses/by/4.0