Abstract The improper disposal of this waste poses environmental challenges, which can be addressed through effective reuse strategies. This study aims to explore the potential of utilizing marine shell waste as partial substitutes for aggregates in concrete. The research involves investigating the physical characteristics of the recycled aggregate using Atomic Force Microscopy (AFM) and Scanning Electron Microscopy (SEM) techniques to elucidate the contact surface with the paste. Additionally, chemical and mineralogical characteristics are analyzed through X-ray fluorescence and X-ray diffraction tests. The compressive strength test is conducted on concrete samples to assess the performance of these materials as both aggregate (shell type A) and filler (shell type B). The findings indicate that replacing up to 20% of marine shells as coarse aggregate and 10% as filler demonstrates feasibility for applications in structural concrete. Furthermore, up to 30% replacement can be directed towards non-structural concrete, providing a comprehensive understanding of the potential applications of marine shell residues in concrete production.

Resumo As atividades de mariscagem e malacocultura produzem uma grande quantidade de resíduos sólidos compostos por conchas marinhas. O impacto ambiental do descarte inadequado pode ser atenuado com estratégias de reaproveitamento. O objetivo deste trabalho é investigar a viabilidade do uso de resíduo de conchas marinhas com substituintes parciais de agregados no concreto. As características físicas do agregado reciclado foram investigadas através das técnicas de Microscopia de Força Atômica (MFA) e Microscopia Eletrônica de Varredura (MEV) a fim de esclarecer aspectos da superfície de contato com a pasta; as características químicas e mineralógicas foram investigadas por meio dos ensaios de fluorescência de raios-X e difração de raios-X; e o ensaio de resistência à compressão foi conduzido em amostras de concreto foram moldadas para avaliação do comportamento destes materiais do comportamento destes materiais como agregado (concha tipo A) e fíler (concha tipo B). Concluiu-se que o uso de até 20% de substituição de concha marinha como agregado graúdo e 10% como filer mostrou viabilidade para aplicações em concretos estruturais e, de forma complementar, teores de até 30% podem ser direcionados à concretos não estruturais.

Abstract In Yucatan, the transition from rural to semi-urban communities has occurred mainly in the municipality seats; this transition comes with the problems of waste management. The municipalities oversee the Integral Urban Solid Waste Management (IUSWM); but in recent years, the public-private partnership for waste management has proved to be an effective strategy. There are few studies on the IUSWM in rural or semi-urban areas and the users’ willingness to pay, information that would help public policymakers to design adequate plans and programs for its management. Therefore, the purpose of this study is to determine the socioeconomic factors associated with the willingness to pay for the IUSWM of users in semi-urban municipalities of Yucatan. A total of 1,144 interviews were conducted in 6 semi-urban localities in Yucatan, and the data were analyzed using descriptive and inferential statistics with a Tobit regression econometric model. 69.75% of the surveyed users declared that they were willing to pay an average of 17.65 Mexican pesos (0.85 U.S. dollars) for the integral urban solid waste management. The willingness to pay decreases when the Mayan language predominates among the member of the household, and when they have fewer tangible assets and rooms. There are cultural and social factors rooted in solid waste collection, this integrated system may be accompanied by other types of economic incentives to modify consumers’ behavior towards something more beneficial for the environment, such as the homes’ income.

Resumen La transición de lo rural a lo semiurbano en Yucatán ocurre principalmente en las cabeceras municipales, y trae consigo problemas de gestión de los residuos. Las autoridades municipales son las encargadas del Manejo Integral de los Residuos Sólidos Urbanos (MIRSU); pero en últimos años, la asociación entre el sector público y el privado para la gestión de los residuos resulta una estrategia eficaz. Existen pocos estudios sobre el MIRSU en zonas rurales o semiurbanas y la disposición a pagar de los usuarios, información que ayudaría a los creadores de política pública a diseñar planes y programas adecuados para su gestión. Por lo tanto, el objetivo de este estudio es determinar los factores socioeconómicos asociados a la disposición a pagar por el MIRSU de los usuarios de municipios semiurbanos de Yucatán. Se realizaron 1,144 encuestas en 6 localidades semiurbanas de Yucatán, los datos se analizaron mediante estadística descriptiva e inferencial con un modelo econométrico de regresión Tobit. El 69,75% de los usuarios encuestados declararon estar dispuestos a pagar por el manejo integral de los residuos sólidos un monto promedio de 17,65 pesos mexicanos (0,85 dólares estadounidenses). La disposición a pagar disminuye cuando predomina el idioma maya, y mientras menos activos físicos y habitaciones tenga el hogar. Existen elementos culturales y sociales arraigados en la recolección de residuos sólidos, este sistema integral puede ir acompañado de otro tipo de incentivos económicos para modificar el comportamiento de los consumidores hacia algo más beneficioso para el medio ambiente, tal como el ingreso familiar.

Abstract During the last decades in Puno, Peru, the problem of contamination has worsened due to the combined action of the disorderly growth of the urban population, poor management of solid waste, discharge of untreated sewage into the bay of Lake Titicaca and practices of inadequate sanitation and hygiene, severely affecting the environment and human health. The objective of the study was to characterize the pro-environmental attitudes and behaviors of the city’s population of Puno in relation to sanitation, pollution and environmental management. The research is nonexperimental, quantitative, cross-sectional, descriptive, correlational and micro level of analysis. The universe of study was the population over 18 years of age in the urban area, which comprises 97,264 inhabitants; the sample, determined at simple random, was 382 people. A structured questionnaire was applied. Descriptive and inferential analysis and hypothesis testing were performed with SPSS statistical software. The results indicate that the environmental attitudes of the majority of the population are positive regarding factors and sources of pollution and effects on human health. On the contrary, environmental practices are inadequate in environmental management in the home and health and hygiene conditions in the home. It is concluded that the sustainable improvement of pro-environmental attitudes and behaviors demands a new public policy of environmental education, whose implementation incorporates the effective participation of civil society based on an incentive system.

Resumen Durante las últimas décadas en Puno, Perú, la problemática de la contaminación se fue agudizando por la acción combinada del crecimiento desordenado de la población urbana, gestión deficiente de residuos sólidos, descarga de aguas servidas sin tratamiento en la bahía del lago Titicaca y prácticas de sanidad e higiene inadecuadas; situaciones que afectan severamente el ambiente y la salud humana. El objetivo del estudio fue caracterizar las actitudes y comportamientos proambientales de la población de la ciudad de Puno en relación al saneamiento, la contaminación y la gestión ambiental. La investigación es no experimental, cuantitativa, trans¬versal, descriptiva, correlacional y nivel de análisis micro. El universo de estudio fue la población mayor de 18 años del área urbana, que comprende 97.264 habitantes; la muestra, deter¬minada al azar simple, fue de 382 personas. Se aplicó un cuestionario estructurado. El análisis descriptivo, inferencial y prueba de hipótesis se realizó con el software estadístico SPSS. Los resultados señalan que las actitudes ambientales de la mayoría de la población son positivas respecto a factores y fuentes de contaminación y efectos en la salud humana; contrariamente, las prácticas ambientales son inadecuadas en gestión ambiental en el hogar y condiciones de sanidad e higiene en la vivienda. Se concluye, que la mejora sostenible de actitudes y comportamientos proambientales, demanda de una nueva política pública de educación ambiental, cuya implementación incorpore la participación efectiva de la sociedad civil con base a un sistema de incentivos.

Resumen (Introducción): La sostenibilidad de los hogares es un gran desafío en la actualidad. En ellos se desarrollan actividades que aceleran la degradación del ambiente como, por ejemplo, la mala disposición de residuos sólidos urbanos, consumo excesivo de energía eléctrica y agua, uso de combustibles fósiles. (Objetivo): Determinar el nivel de sostenibilidad de hogares urbanos del municipio de Macuspana, Tabasco, México. (Metodología): Se evaluaron 370 hogares urbanos representativos al total de viviendas urbanas habitadas en el municipio, con un nivel de confianza del 95 %. Se utilizo un marco de evaluación de la sostenibilidad para hogares urbanos (MESHU) creado a partir de la selección, medición y clasificación porcentual de indicadores sociales, económicos y ambientales. Se evaluaron 30 indicadores de sostenibilidad divididos en los siguientes atributos: autogestión, adaptabilidad, cultura ambiental, convivencia y productividad. (Resultados): El nivel de sostenibilidad de los hogares fue del 45 %, es decir, son medianamente sustentables. (Conclusiones): La evaluación de sostenibilidad en hogares urbanos permitió una aproximación a la realidad sobre las prácticas y uso de los recursos naturales en la vida cotidiana. Se evidenció también que existe una cultura en los hogares hacia la sostenibilidad.

Abstract (Introduction): The sustainability of homes is a mayor challenge today. Activities that accelerate environmental degradation are developed on them, for example: poor disposal of urban solid waste, excessive consumption of electricity and water, and use of fossil fuels. (Objective): To determine the level of sustainability of urban homes in the municipality of Macuspana, Tabasco, Mexico. (Methodology): 370 urban house representatives of the total number of urban dwellings inhabited in the city were evaluated, with a confidence level of 95 %. A Sustainability Assessment Framework for Urban Homes (MESHU) created from the selection, measurement, and percentage rank of social, economic, and environmental indicators is proposed. 30 sustainability indicators divided into the following attributes were evaluated: self-management, adaptability, environmental culture, coexistence and productivity. (Results): The sustainability level of the homes was 45 %, this means that they are pretty sustainable. (Conclusions): The sustainability assessment of urban homes allowed an approximation of the reality of practices and use of natural resources in the daily life. It was also evident that homes have a culture toward sustainability.

Abstract This article synthesizes research related to the development by the author, of his doctoral thesis on the subject of product design in the service economy. In this thesis, the design operation of public services is analyzed through the study of four cases of design of integral solid waste management systems. These case studies have been located in Ecuador in the last 4 years and are related to a public policy of decentralization that forces local governments to assume the competence of this public service. In the part of the research that gives rise to this article, it specifically seeks to investigate the perception of the community regarding the quality of a public service and relate it to the willingness to pay a specific rate. The existence of relationships between the level at which the community participates in the elaboration of public policy, the perception of service quality and the willingness to pay for it, is demonstrated. There is also a relationship between the perception of service quality and the availability of technically selected equipment in contrast to the perception of quality when the equipment is selected for political agendas. In addition, the role of the media in articulating the participation of society is described, but also in the formation of a collective conscience about the responsibilities of citizens, their rights and obligations towards the integral management of solid waste and the environment, and the need to adopt responsible habits.

Resumen Este artículo sintetiza una investigación relacionada con el desarrollo por parte del autor de su tesis doctoral en torno al tema del diseño de productos en la economía de servicios. En esta tesis se analiza la operación de diseño de servicios públicos a través del estudio de cuatro casos de diseño de sistemas de gestión integral de desechos sólidos. Estos casos de estudio están ubicados en Ecuador en los últimos 4 años y están relacionados con una política pública de descentralización que obliga a los gobiernos locales a asumir la competencia de este servicio público. En la parte de la investigación que da lugar a este artículo, específicamente se busca indagar la percepción de la comunidad respecto de la calidad de un servicio público y relacionarlo con la disposición al pago de una tarifa determinada. Se demuestra la existencia de relaciones entre el nivel en que la comunidad participa en la elaboración de la política pública, la percepción de calidad del servicio y la disposición al pago por recibirlo. Se encuentra además una relación entre la percepción de calidad del servicio y la disponibilidad de equipamiento seleccionado técnicamente en contraste con la percepción de calidad cuando el equipamiento se selecciona por intereses políticos. Además, se describe el papel que tienen los medios de comunicación en articular la participación de la sociedad, pero también en la formación de una conciencia colectiva sobre las responsabilidades de la ciudadanía, sus derechos y obligaciones para con la gestión integral de los residuos sólidos y el medioambiente, y la necesidad de adoptar hábitos responsables.

Resumo Este artigo sintetiza as pesquisas relacionadas ao desenvolvimento do autor de sua tese de doutorado sobre o tema design de produto na economia de serviços. Nesta tese, o projeto operacional de serviços públicos é analisado através do estudo de quatro casos de projeto de sistemas integrais de gerenciamento de resíduos sólidos. Estes estudos de caso estão localizados no Equador nos últimos 4 anos e estão relacionados a uma política pública de descentralização que obriga os governos locais a assumirem a competência deste serviço público. Na parte da pesquisa que dá origem a este artigo, busca-se especificamente investigar a percepção da comunidade sobre a qualidade de um serviço público e relacioná-la com a disposição de pagar uma taxa específica. É demonstrada a existência de relações entre o nível em que a comunidade participa da elaboração das políticas públicas, a percepção da qualidade do serviço e a disposição de pagar pelo recebimento. Também existe uma relação entre a percepção da qualidade do serviço e a disponibilidade de equipamentos selecionados tecnicamente em contraste com a percepção de qualidade quando o equipamento é selecionado por interesses políticos. Além disso, é descrito o papel da mídia na articulação da participação da sociedade, mas também na formação de uma consciência coletiva sobre as responsabilidades dos cidadãos, seus direitos e deveres para com a gestão integral dos resíduos sólidos e o meio ambiente e a necessidade de adoção de hábitos responsáveis.

Resumo O presente estudo envolve a análise química e bacteriológica de água de diferentes fontes, ou seja, furo, poços, garrafa e torneira, dos distritos de Peshawar, Mardan, Swat e Kohat da província de Khyber Pakhtunkhwa (KP), Paquistão. De cada distrito, 50 amostras de água (10 amostras de cada fonte), independentemente do status urbano e rural, foram coletadas dessas fontes e analisadas para sulfatos, nitratos, nitritos, cloretos, sólidos solúveis totais e coliformes (E. coli). Os resultados indicaram que a maioria das fontes de água tinha uma contagem inaceitável de E. coli, ou seja, > 34 UFC / 100 mL. As amostras positivas para E. coli foram elevadas no distrito de Mardan, seguido por Kohat, Swat e distrito de Peshawar. Além disso, algumas fontes de água também foram contaminadas quimicamente por diferentes fertilizantes inorgânicos (nitratos/nitritos de sódio, potássio), mas em níveis seguros, enquanto os resíduos agrícolas e industriais (compostos de cloreto e sulfato) estavam em níveis inseguros. Entre todos os distritos, a qualidade da água foi considerada comparativamente mais deteriorada nos distritos de Kohat e Mardan do que nos distritos de Peshawar e Swat. Essas fontes de água química e bacteriologicamente impróprias para beber podem causar problemas à saúde humana.

Abstract The present study involves the chemical and bacteriological analysis of water from different sources i.e., bore, wells, bottle, and tap, from Peshawar, Mardan, Swat and Kohat districts of Khyber Pakhtunkhwa (KP) province, Pakistan. From each district, 50 water samples (10 samples from each source), regardless of urban and rural status, were collected from these sources and analysed for sulphates, nitrates, nitrites, chlorides, total soluble solids and coliforms (E. coli). Results indicated that majority of the water sources had unacceptable E. coli count i.e.> 34 CFU/100mL. E. coli positive samples were high in Mardan District, followed by Kohat, Swat and Peshawar district. Besides this, the some water sources were also chemically contaminated by different inorganic fertilizers (nitrates/nitrites of sodium, potassium) but under safe levels whereas agricultural and industrial wastes (chloride and sulphate compounds) were in unsafe range. Among all districts, the water quality was found comparatively more deteriorated in Kohat and Mardan districts than Peshawar and Swat districts. Such chemically and bacteriologically unfit water sources for drinking and can cause human health problems.

Resumo Entre os cogumelos comestíveis, Pleurotus eryngii é único por causa de seu sabor e seu admirável perfil medicinal e nutricional. O Paquistão é um país agrícola com diversas culturas. No entanto, os resíduos das culturas hortícolas e agronômicas são desperdiçados sem aproveitamento na cadeia alimentar. Assim, um estudo foi realizado para avaliar o desempenho de resíduos de culturas com custos relativamente baixos e facilmente disponíveis, ou seja, algodão, arroz, trigo, mostarda e castanha-de-água, para o aumento da produtividade e nutrição de cepas de P. eryngii P9 (China) e P10 (PSU-EUA). Os resultados revelaram que os atributos morfológicos, ou seja, função do micélio, desenvolvimento de frutos, rendimento e eficiência biológica, foram significativamente maiores usando resíduos de algodão em comparação com outros substratos. Em relação aos atributos bioquímicos, ou seja, sólidos solúveis totais (12,67 °Brix), fenólicos (259,6 mg / 100 g), umidade (92,3%) e teores de ácido ascórbico (2,9 mg / 100 ml), também foram significativamente maiores usando resíduos de algodão. Já os teores de acidez (0,30%), açúcares redutores (7,67%), não redutores (4,33%) e açúcares totais (12%) foram os mais elevados na palha de mostarda. A análise de nutrientes dos substratos mostrou que os níveis de nutrientes aumentaram após a colheita da cultura em comparação com os níveis antes da colheita. Os resultados gerais revelaram que os resíduos de algodão e a palha de mostarda são substratos promissores para o melhor crescimento de P. eryngii e têm potencial na melhoria da produtividade e nutrição. Além disso, a cepa P10 apresentou melhor desempenho em comparação com a P9.

Abstract Among edible mushrooms, Pleurotus eryngii is unique due to its flavor, admirable medicinal and nutritional profiling. Pakistan is an agricultural country diverse in various crops. However, the residues of the horticultural and agronomic crops are wasted without utilization in the food chain. Hence, a study was performed to assess the performance of relatively low-cost, easily available crops residues i.e. cotton, rice, wheat, mustard and water chestnut for yield and nutrition enhancement of Pleurotus eryngii strains P9 (China) and P10 (PSU-USA). The results revealed that morphological attributes i.e. mycelium run, fruit development, yield and biological efficiency were significantly higher by using cotton waste as compared to other substrates. Regarding biochemical attributes i.e. total soluble solids (12.67 °Brix), phenolics (259.6 mg/100g), moisture (92.3%) and ascorbic acid contents (2.9 mg/100ml) were also significantly higher by using cotton waste. Whereas, acidity (0.30%), reducing sugar (7.67%), non-reducing (4.33%) and total sugars contents (12%) were found highest by using mustard straw. Nutrient analysis of substrates showed that nutrient levels were increased after harvesting of crop as compared to before harvesting levels. Overall results revealed that cotton waste and mustard straw are promising substrates for Pleurotus eryngii better growth and have potential in yield and nutrition enhancement. Moreover, P10 strain performed better as compared to P9.

RESUMO Objetivo: Detectar aglomerados espaciais e espaço-temporais de arboviroses urbanas e investigar se o índice desenvolvimento social (IDS) e o descarte irregular de lixo estão relacionados ao coeficiente de detecção das arboviroses urbanas em São Luís, Maranhão. Métodos: Os casos confirmados de dengue, Zika e chikungunya em São Luís, no período de 2015 a 2019, foram georreferenciados para o setor censitário de residência. O modelo de regressão Autorregressivo Condicional Bayesiano foi utilizado para identificar a associação entre o coeficiente de detecção de arboviroses urbanas, IDS e pontos de descarte irregular de lixo. Resultados: O padrão espacial de arboviroses apontou para a predominância de cluster de baixo coeficiente de detecção, exceto em 2016. Para os anos de 2015, 2016, 2017 e 2019, o aumento de uma unidade de ponto de lixo aumenta o coeficiente de detecção de arboviroses em 1,25, 1,09, 1,23 e 1,13 casos de arboviroses por 100 mil habitantes, respectivamente. O IDS não foi associado ao coeficiente de detecção de arboviroses. Conclusão: Em São Luís foram identificados aglomerados espaço-temporais de risco para a ocorrência de arboviroses e a associação positiva entre o coeficiente de detecção de arboviroses e os pontos de descarte irregular de lixo.

ABSTRACT Objective: To detect spatial and spatiotemporal clusters of urban arboviruses and to investigate whether the social development index (SDI) and irregular waste disposal are related to the coefficient of urban arboviruses detection in São Luís, state of Maranhão, Brazil. Methods: The confirmed cases of Dengue, Zika and Chikungunya in São Luís, from 2015 to 2019, were georeferenced to the census tract of residence. The Bayesian Conditional Autoregressive regression model was used to identify the association between SDI and irregular waste disposal sites and the coefficient of urban arboviruses detection. Results: The spatial pattern of arboviruses pointed to the predominance of a low-incidence cluster, except 2016. For the years 2015, 2016, 2017, and 2019, an increase of one unit of waste disposal site increased the coefficient of arboviruses detection in 1.25, 1.09, 1.23, and 1.13 cases of arboviruses per 100 thousand inhabitants, respectively. The SDI was not associated with the coefficient of arboviruses detection. Conclusion: In São Luís, spatiotemporal risk clusters for the occurrence of arboviruses and a positive association between the coefficient of arbovirus detection and sites of irregular waste disposal were identified.

Resumen La injusticia ambiental trastoca los derechos humanos de las poblaciones. Este artículo se centra en el estado de Jalisco, México, territorio en el que se registraron el 70 % de las violaciones a los derechos humanos en materia ambiental entre 2016 y 2019. El objetivo es analizar las recomendaciones emitidas por la Comisión Estatal de Derechos Humanos de Jalisco en términos de violación de los derechos a un medioambiente sano, desde el 2000 al 2022. Para ello, se realizó un análisis cualitativo a través de datos hemerográficos de esta institución, los cuales se sistematizaron en categorías analíticas según el tipo de injusticia ambiental. Aunado a esto, se presentaron tres casos emblemáticos de violación a los derechos humanos en la materia. Los hallazgos muestran que las recomendaciones se vinculan con situaciones de contaminación de los cuerpos de agua y con la falta de suministro y su privatización; con la pérdida de la biodiversidad o con afectaciones a esta; y con el mal manejo de los residuos sólidos urbanos. Estos problemas se dan particularmente a través de procesos de distribución desigual de los impactos ambientales y de la exclusión de las personas afectadas en la toma de decisiones. Los resultados evidencian el lento proceso de reconocimiento a nivel institucional para señalar la transgresión al derecho a tener un ambiente sano en Jalisco.

Abstract Environmental injustice disrupts the human rights of populations. This article focuses on the state of Jalisco, Mexico, a territory in which 70% of human rights violations were recorded in environmental matters between 2016 and 2019. The objective is to analyze the recommendations issued by the Jalisco State Human Rights Commission in terms of violation of the rights to a healthy environment from 2000 to 2022. For this purpose, a qualitative analysis was carried out through newspaper data from this institution, which were systematized in analytical categories according to types of environmental injustice. In addition, three emblematic cases of human rights violations in this area were presented. The findings show that recommendations are linked to situations of contamination of water bodies, lack of water supply, and water privatization; with the loss of biodiversity or with related affectations; and with the poor management of urban solid waste. These problems occur particularly through processes of unequal distribution of environmental impacts and the exclusion of affected people from decision-making. The results show the slow process of recognition at the institutional level to point out the transgression of the right to a healthy environment in Jalisco.

ABSTRACT The objective of this study was to analyze solid waste management in order to develop investment projects. We worked with a descriptive documentary type of research through a systematic review of 18 original articles related to public management and investment projects. There is much to be understood about solid waste and public management; the authors mention both elements bilaterally and some general aspects, making it possible to search in different search media (library) and original scientific journals and review journals to identify relevant aspects of some topics of great interest in terms of recognizing the methodological processes used for their development by those responsible for the research.

RESUMEN Se tiene por objetivo analizar la gestión de residuos sólidos para elaborar proyectos de inversión. Se trabajó con un tipo de investigación descriptiva documental mediante una revisión sistemática de 18 artículos originales relacionados a la gestión pública y proyectos de inversión. Existe mucho por entender acerca de los residuos sólidos y la gestión pública; los autores mencionan ambos elementos de forma bilateral y algunos aspectos de ámbito general, haciendo posible la indagación en diferentes medios de búsqueda (Biblioteca) y revistas de orden científico original y de revisión, para identificar aspectos relevantes de algunos temas de gran interés en cuanto a reconocer los procesos metodológicos empleados para su desarrollo por los responsables de las investigaciones.

ABSTRACT The objective is to analyze solid waste management in municipal management from a systemic review. The methodology was congruent with the quantitative, exploratory- bibliometric approach. The studies reviewed aim to diagnose and evaluate the impact of solid waste generated by various cities and economic sectors on the environment, ecotourism activities, public health; also in this process it is possible to identify the most common domestic waste and determine the properties of materials in landfills and industrial waste deposits.

RESUMEN Se tiene por objetivo analizar el manejo de residuos sólidos en la gestión municipal desde una revisión sistémica. La metodología tuvo congruencia con el enfoque cuantitativo, de tipo exploratorio - bibliométrico. Los estudios revisados tienen como objetivo diagnosticar y evaluar el impacto de los residuos sólidos generados por diversas ciudades y sectores económicos sobre el medio ambiente, las actividades ecoturísticas, la salud pública; también en este proceso es posible identificar los residuos domésticos más comunes y determinar las propiedades de los materiales en vertederos y depósitos de residuos industriales.

Resumen: El relleno sanitario abandonado en la ciudad de Veracruz, ubicado al norte del municipio, fue construido en el año 2000. Operó, para un tiempo de vida útil de 10 años, de acuerdo a la normatividad vigente en la época. Sin embargo, continuó su operación de manera irregular, colapsando y convirtiéndose en un sitio de disposición final controlado que fue clausurado por las autoridades ambientales estatales en el año 2019. Mediante el uso de imágenes satelitales de Google Earth y el uso de técnicas multicriterio se determinó que cuenta con una superficie de 167 228 m² y un volumen acumulado de residuos de 1 505 052 m³. Se utilizó el Modelo Mexicano de Biogás 2.0 para estimar la generación de Biogás, que hasta el año 2023 fue de un total de 2 898 064 toneladas de Biogás. Con la ayuda de la metodología para el cálculo de efecto invernadero por residuos sólidos urbanos se determinó que en este mismo período se emitieron un total de 2 522 057.3 toneladas de dióxido de carbono, 1 162 154.8 toneladas de metano y 47 115.9 toneladas de óxido nitroso, lo que representa un total de 47.5 Mt CO2eq. Lo dicho evidencia la importancia de minimizar las emisiones de gases de efecto invernadero, así como su impacto al ambiente por el calentamiento global de la atmósfera, sobre todo en el ecosistema costero en el que se asienta el municipio de Veracruz, México.

Abstract: The Abandoned Sanitary Landfill of the City of Veracruz, located to the north of the municipality, was built in the year 2000 and operated according to the regulations in force at the time, for a useful life of 10 years. However, it continued its operation irregularly, collapsing and becoming a controlled final disposal site that was closed by the state environmental authorities in 2019. Through the use of Google Earth satellite images using multicriteria techniques, it was determined that it has an area of 167 228 m² and an accumulated volume of waste of 1 505 052 m³, The Mexican Biogas Model 2.0 was used to estimate the generation of biogas that until the year 2023 was a total of 2 898 064 tons of biogas and with the help of the methodology for the greenhouse effect calculation for urban solid waste. It was determined that in this same period a total of 2 522 057.3 tons of carbon dioxide, 1 162 154.8 tons of methane and 47 115.9 tons of nitrous oxide were emitted. Which represents a total of 47.5 Mt CO2eq, which shows the importance of minimizing greenhouse gas emissions and their impact on the environment due to global warming of the atmosphere, especially in the coastal ecosystem where the municipality of Veracruz, Mexico is located.

Resumen: El impacto generado por los Residuos Sólidos Municipales (RSM) está asociado al riesgo en la población debido a la falta de conocimiento sobre la disposición final adecuada de los desechos de un solo uso, específicamente las mascarillas durante la pandemia de COVID-19. Con el objetivo de llevar a cabo un diagnóstico nacional sobre la gestión y disposición final de los residuos se preparó una encuesta nacional con el apoyo de la herramienta digital Google Form, con el fin de obtener datos y evaluar el impacto ambiental en el uso y la disposición de mascarillas urbanas de uso obligatorio durante la pandemia. Se identificó que el 35 % de los encuestados mezcla las mascarillas con los residuos domésticos, lo que representa un factor potencial de problemas de salud pública y ambientales. De estos, el 61.5 % indicó que desconocía la existencia de un plan de gestión de residuos de COVID-19. Esto demostró la falta de conocimiento al respecto, lo que provoca una gestión inadecuada de estos residuos. Los resultados de esta investigación resaltan la importancia de implementar alternativas de tratamiento para reducir el impacto de las mascarillas, enfatizando que el tratamiento de remediación más adecuado debe ser económicamente viable y con un mínimo impacto ambiental para gestionar adecuadamente los RSM de COVID-19.

Abstract: The impact generated by Municipal Solid Waste (MSW) is associated with the risk in the population due to the lack of knowledge of the proper final disposal of single-use waste, specifically with face masks during the COVID-19 pandemic. With the objective of carrying out a national diagnosis on the management and final disposal of waste, a national survey was prepared with the support of the digital tool google form, to obtain data to evaluate the environmental impact on the use and disposal of urban masks of mandatory use during the pandemic. It was identified that 35 % of the interviewees mix the face masks with household waste, which is a potential factor for public health and environmental problems. Of these, 61.5 % indicated that they were unaware of the existence of a COVID-19 waste management plan. This demonstrated the lack of knowledge about it, which causes inadequate management of these residues. The results of this research demonstrated the importance of implementing treatment alternatives to reduce the impact of the masks, highlighting that the most appropriate remediation treatment should be economically viable and with minimal environmental impact to properly manage MSW-COVID -19.

ABSTRACT Using the FPSEEA matrix, this work aimed to understand the socio-environmental reality of the implementation of reverse logistics of medicines to minimize pharmaceutical-contamination and achieve the SDGs. Thus, it highlighted the actions of control, monitoring and environmental education to reduce the impacts of pharmaceutical waste and promote sustainability. In addition, it analyzed 18 socio-environmental variables by hierarchical clustering and K-means methods, defining three Brazilian scenarios: more developed (Southeast); less developed (North, Northeast and Midwest); and developing (South). Additionally, it showed that the form of final disposal of solid waste is influenced by the existence of reverse logistics laws for medicines.

RESUMO Utilizando a matriz FPSEEA, este trabalho objetivou compreender a realidade socioambiental da implementação da logística reversa de medicamentos para minimizar a fármaco-contaminação e alcançar os ODS. Assim, destacou as ações de controle, monitoramento e educação ambiental para redução dos impactos dos resíduos farmacêuticos e promoção da sustentabilidade. Além disso, analisaram-se 18 variáveis socioambientais pelos métodos cluster hierárquico e K-means, definindo três cenários brasileiros: mais desenvolvido (Sudeste); menos desenvolvido (Norte, Nordeste e Centro-Oeste); e em desenvolvimento (Sul). Adicionalmente, mostrou que a forma de disposição final dos resíduos sólidos é influenciada pela existência de leis de logística reversa de medicamentos.

Abstract The article analyzes the participation of social actors in the management of the circular economy of urban solid waste in the state of Chihuahua, Mexico. The methodology consisted of semi- structured interviews, virtual interactive workshops (with the implementation of electronic surveys), surveys of municipal governments representatives, and personal communications. The results show that social actors barely glimpse the economic, social, and environmental meaning of betting on the circular economy. The article contributes to the analysis of the circular economy paradigm as a current sustainability tool. It is concluded that little has been studied about the circular economy in Mexico and that the participation of non-state actors has not been valued and used efficiently. The article reflects on what should and can be done with solid waste in Mexico in the future.

Resumen En el artículo se analiza la participación de los actores sociales en la gestión de la economía circular de los residuos sólidos urbanos en el estado de Chihuahua, México. La metodología consistió en entrevistas semiestructuradas, talleres interactivos virtuales (con aplicación de encuestas electrónicas), encuestas a representantes de gobiernos municipales y comunicaciones personales. Los resultados muestran que los actores sociales apenas vislumbran el significado económico, social y ambiental de apostar por la economía circular. El artículo contribuye con el análisis del paradigma de la economía circular como herramienta actual de la sostenibilidad. Se concluye que el concepto de economía circular ha sido poco estudiado en México y que la participación de los actores no estatales no ha sido valorada ni utilizada eficientemente. El artículo reflexiona en torno a lo que se debe y puede hacer con los residuos sólidos en México en el futuro.