Abstract (Introduction): Within the framework of the present capitalist system, human beings have become an important polluting agent. Current production and consumption processes do not consider the existence of finite natural resources and a planet incapable of treating the waste that the prevailing way of life generates. Given these circumstances, the study of non-linear models is of interest, which make a more rational use of the waste that the productive activity generates, favoring recycling mechanisms. The phenomenon of recycling becomes particularly relevant in the case of electrical and electronic devices, whose ability to be degraded and metabolized by planet Earth is extremely difficult. (Objective): Evaluate the feasibility of installing and starting a recycling plant for electrical and electronics items in the town of Bahía Blanca (Argentina), during 2021. (Methodology): The conventional method for evaluating investment projects was used, considering technical, legal and economic aspects. (Results): The project is not acceptable according to the profitability intended by the investor. The possibility of financing was also included, which made the project even less profitable, and the sensitivity of the results was measured, finding that the price should be 1.48 % higher than that used in the analysis. (Conclusions): Other alternatives must be explored to make this proposal profitable from an economic and financial point of view.

Resumen (Introducción): En el marco del sistema capitalista vigente, el ser humano se ha transformado en un agente significativo de contaminación. Las dinámicas productivas y de consumo actuales no contemplan la existencia de recursos naturales finitos y de un planeta incapaz de procesar los desperdicios que el modo de vida habitual genera. Dadas estas circunstancias, cobra interés el estudio de modelos no lineales, que hagan un uso más racional de los residuos derivados de la actividad productiva, los cuales favorezcan mecanismos de reciclaje. El fenómeno del reciclaje se vuelve, en particular, relevante para el caso de los artefactos eléctricos y electrónicos; la capacidad del planeta Tierra para degradarlos y metabolizarlos resulta sumamente difícil. (Objetivo): Evaluar la factibilidad de la instalación y puesta en marcha de una planta recicladora de artículos eléctricos y electrónicos en la localidad de Bahía Blanca (Argentina), durante el 2021. (Metodología): Se utilizó la metodología convencional de evaluación de proyectos de inversión, considerando aspectos técnicos, legales y económicos. (Resultados): El proyecto no es aceptable según la rentabilidad pretendida por el inversor. También se incluyó la posibilidad de un financiamiento, lo que hizo que el plan fuera menos rentable aún, y se midió la sensibilidad de los resultados: se halló que el precio debiera ser 1.48 % superior al utilizado en el análisis. (Conclusiones): Se deben explorar otras alternativas para lograr que el proyecto sea rentable desde el punto de vista económico-financiero.

The selective separation of precious metals from complex aqueous solutions is important in protecting the environment, aquatic ecosystems, water resources and recycling resources. In this study, cysteine-containing polymeric nanoparticles were synthesized using the molecular imprinting (MIP) technique with the mini-emulsion polymerization method. The basis of the polymer design is inspired by affinity of silver to cysteine in biological systems. The synthesized silver ion imprinted (Ag+-IIP) poly(hydroxyethylmethacrylate-N -methacryloyl-L-cysteine) poly(HEMA-MAC) nanoparticles were characterized by elemental analysis, zeta sizer, Fourier transform infrared (FTIR) spectroscopy, atomic force microscopy (AFM), and scanning electron microscopy (SEM). The effects of pH, ionic strength and interaction time on adsorption of Ag+ ions were investigated. In experimental studies, the highest adsorption amount (196.9 mg g1 nanoparticle) was reached in a short period of 40 min at pH 5.0 and 150 mg L-1 concentration. Selectivity studies of synthesized Ag+-IIP nanoparticles against silver (Ag+) ions were carried out in the presence of lithium (Li+), barium (Ba2+), mercury (Hg2+) and cadmium (Cd2+) ions. Experimental results indicate that nanoparticles adsorb Ag+ ions with high selectivity. Ag+-IIP nanoparticles have 3.7, 3.1, 2.4, and 2.6 times more selective or higher affinity for Ag+ ions compared to Li+, Ba2+, Hg2+ and Cd2+ ions, respectively, compared to Ag+-non-imprinted (NIP) nanoparticles. environment ecosystems study cysteinecontaining containing MIP (MIP miniemulsion mini emulsion method systems Ag+IIP AgIIP IIP Ag (Ag+-IIP polyhydroxyethylmethacrylateN poly hydroxyethylmethacrylate N methacryloylLcysteine methacryloyl L -methacryloyl-L-cysteine polyHEMAMAC HEMA MAC poly(HEMA-MAC analysis sizer FTIR (FTIR spectroscopy AFM, AFM , (AFM) SEM. SEM . (SEM) investigated 196.9 1969 196 9 (196. g nanoparticle 4 50 5 0 5. 15 L1 1 L- concentration (Ag+ Li Li+ (Li+) Ba2 Ba Ba2+ (Ba2+) Hg2 Hg (Hg2+ Cd2 Cd (Cd2+ selectivity 37 3 7 3.7 31 3.1 24 2 2.4 26 6 2. respectively Ag+nonimprinted Agnonimprinted non NIP (NIP (AFM (SEM 196. 19 (196 (Ag (Li+ (Ba2+ (Hg2 (Cd2 3. nonimprinted (19 (Li (Ba2 (Hg (Cd (1 (Ba (

This study presents a solution to solid waste problems, focusing on spent lithium-ion batteries (LiBs) and iron ore tailings (IOT) from the Mariana environmental accident in Brazil. The approach involves the production CoFe2O4 from LiBs and IOT, which serves as a catalyst for solar photo-Fenton reactions for methylene blue (MB) decolorization and as an electrochemical sensor for ascorbic acid (AA) detection. Chemical analysis showed recycling potential, with 45.22 ± 0.22% m m−1 Co from LiBs and 14.9 ± 1.5% m m−1 Fe from IOT, determined by inductively coupled plasma atomic emission spectroscopy (ICP OES) and flame atomic absorption spectrometry (FAAS). The sol-gel synthesized CoFe2O4 exhibited a crystallite size of 51.9 ± 1.3 nm and agglomerated crystal clusters. Recycled-CoFe2O4 exhibited a 98.1% MB decolorization efficiency in 60 min under solar irradiation and remained above 92.3% in all 7 reuse cycles. The electrochemical sensor exhibited a coefficient of determination of 0.9987, a sensitivity of 3.352 ± 0.0428 μA mol L−1, and a limit of detection of 0.5511 µM in the concentration range of 1.96 to 23.08 mmol L−1 for AA detection. This study demonstrates the potential of recycled-CoFe2O4 in an environmentally friendly dye removal and as an electrochemical sensor, offering sustainable waste management and resource utilization with solar energy. problems lithiumion lithium ion (LiBs IOT (IOT Brazil CoFeO CoFe O CoFe2O photoFenton photo Fenton (MB (AA 4522 45 22 45.2 022 0 0.22 m1 1 m− 149 14 9 14. 15 5 1.5 ICP OES FAAS. FAAS . (FAAS) solgel sol gel 519 51 51. 13 3 1. clusters RecycledCoFe2O4 RecycledCoFeO Recycled Recycled-CoFe2O 981 98 98.1 6 923 92 92.3 cycles 09987 9987 0.9987 3352 352 3.35 00428 0428 0.042 L1 L 05511 5511 0.551 196 96 1.9 2308 23 08 23.0 L− recycledCoFe2O4 recycledCoFeO recycled recycled-CoFe2O energy 452 4 2 45. 02 0.2 (FAAS RecycledCoFe RecycledCoFe2O 98. 92. 0998 998 0.998 335 35 3.3 0042 042 0.04 0551 551 0.55 19 230 23. recycledCoFe recycledCoFe2O 0. 099 99 0.99 33 3. 004 04 0.0 055 55 0.5 09 0.9 00 05

The recycle and utilization of expired drugs is a challenge for many countries at present. The employment of expired drugs as green corrosion inhibitors is expected to address both drug recycling and corrosion prevention issues, with significant economic and environmental value. Herein, the individually and combination corrosion inhibition performance of expired amoxicillin (AMC) and penicillin V potassium tablets (PVP) for lowcarbon steel in 20% acetic acid solution containing 600 mg L-1 chloride ion are evaluated by electrochemistry and weight loss method. Both the AMC and PVP present the mixed-type corrosion inhibitors mainly affect the cathode process when used individually. The optimum inhibition efficiency is 61.22% (AMC) and 79.21% (PVP), which all appear in 5.0 × 10-3 mol L-1. The AMC and PVP are adsorbed on the steel surface by mixed physisorption and chemisorption, which are consistent with the Langmuir adsorption isotherm. The corrosion inhibition rate drops sharply when AMC and PVP are combined use with a close mole ratio. But a small amount of PVP significantly enhance the corrosion inhibition effect of AMC, the corrosion inhibition rate from 61.22 to 79.72%. The corrosion inhibition rate of AMC and PVP combination inhibitor decreased with the increase of temperature. issues value Herein (AMC (PVP 20 60 L1 L 1 L- method mixedtype type 6122 61 22 7921 79 21 79.21 PVP, , 50 5 0 5. 103 10 3 10- L1. 1. chemisorption isotherm ratio 61.2 7972 72 79.72% temperature 2 6 612 792 7 79.2 61. 797 79.72 79. 79.7

Acetylsalicylic acid (ASA) synthesized in the practical classes of experimental organic chemistry is generally discarded after the classes. Thus, the objective of this work is to find an alternative application for ASA and to promote awareness about the recycling of chemicals in educational and research environments. In addition, it explores the subsequent application of this synthesized ASA in the creation of powdered developers for latent fingerprints. The adopted methodology included the recrystallization of the previously synthesized ASA, followed by the development of three distinct formulations of powdered developers, which include ASA, lignin, and methylene blue. Subsequently, these powders were used to identify latent fingerprints, demonstrating that they are promising substances for such applications. (ASA Thus environments addition fingerprints lignin blue Subsequently applications

Citronellyl esters present broad applications in the cosmetic, pharmaceutical, and food industries due to their organoleptic and biological properties. Lipase-catalyzed acylation of citronellol has been a suitable way to obtain these natural esters on a high scale. This work describes the lipase-catalyzed acylation of citronellol through esterification and transesterification with linear acylating agents (C3-C18) using Novozym®435 as a biocatalyst. The results show that all esters achieved not less than 91% conversion from an esterification model, showing a good reaction profile. Citronellyl propionate and laurate were selected for study in a transesterification reaction model, and it resulted in a lower reaction time for ester conversions. As an example, we highlight citronellyl propionate production, which approximately 10 g L-1 of the product was obtained after 1.5 h of esterification compared to 2 min by transesterification. The final esters were purified with high purity (≥ 90%) and identified by gas chromatography-mass spectrometry (GC-MS), and their structures were elucidated by 1H and 13C nuclear magnetic resonance (NMR). Enzyme recycling was evaluated and Novozym®435 was able to be applied for at least 20 cycles. Results demonstrated the efficiency of acylation reactions catalyzed by this enzyme and showed the potential of the methodology for the production and purification of flavor esters. cosmetic pharmaceutical properties Lipasecatalyzed Lipase scale lipasecatalyzed lipase C3C18 CC C3 C18 C (C3-C18 Novozym435 Novozym 435 Novozym®43 biocatalyst 91 model profile conversions example 1 L1 L L- 15 5 1. ≥ ( 90% 90 chromatographymass chromatography mass GCMS, GCMS GC MS , (GC-MS) H NMR. NMR . (NMR) cycles C3C1 C1 (C3-C1 Novozym43 43 Novozym®4 9 (GC-MS (NMR C3C (C3-C Novozym4 4 Novozym®

Resumo A produção de tintas utilizando resíduos de beneficiamento de granito e mármore é uma nova alternativa para contribuir com o desenvolvimento sustentável na construção civil. Entretanto, a carência de estudos sobre a composição e o desempenho dessas tintas inviabiliza a disseminação desse novo material de construção. Logo, este estudo tem como objetivo investigar a composição dessas tintas utilizando ferramentas estatísticas para obter produtos com desempenho compatível com regulamentações técnicas e tintas comerciais. As formulações de tintas foram definidas através de um planejamento de misturas quaternárias. O teor de sólidos, pH, viscosidade, poder de cobertura e resistência à abrasão foram determinados para todas as amostras. As tintas produzidas com resíduos de granito apresentaram melhor poder de cobertura e resistência à abrasão, pois o resíduo de granito apresenta granulometria mais fina, além de ser predominantemente composto por sílica. Por fim, as tintas produzidas neste estudo e as tintas comerciais apresentaram comportamento semelhante, o que corrobora com o aproveitamento do resíduo do processamento de rochas ornamentais na produção de tintas. civil Entretanto Logo quaternárias sólidos pH viscosidade amostras fina sílica fim semelhante

Abstract The production of paints using waste from granite and marble processing is a new alternative to contribute to sustainable development in civil construction. However, the lack of studies on the composition and performance of these paints makes the dissemination of this new construction material unfeasible. Therefore, this study aims to investigate the composition of these paints using statistical tools to obtain products with performance compatible with technical regulations and commercial paints. The paint formulations were defined through a quaternary mixture planning. The solids content, pH, viscosity, hiding power, and abrasion resistance were determined for all samples. The paints produced with granite waste showed better hiding power and abrasion resistance, as granite waste has a finer granulometry, in addition to being predominantly composed of silica. Finally, the paints produced in this study and the commercial paints showed similar behavior, which supports the use of waste from the processing of ornamental rocks in paint production. However unfeasible Therefore planning content pH viscosity samples granulometry silica Finally behavior

Abstract The organic composition of 65 °% of urban solid waste of the Metropolitan District of Quito originates from food waste, which has negative environmental effects. The purpose of this study was to evaluate the factors related to food waste in homes in the capital and characterize urban solid waste management. The study is quantitative and exploratory. An association analysis was performed for the main categorical variables through calculation of statistical chi squared and an assessment of polychoric relation. A descriptive and multi-scale statistical analyses were performed for focus of the social metabolism to characterize waste management. A noteworthy element was the relation between expenses for purchase of food and non-alcoholic beverages in the last month-household income in the last month (p value < 5 %). Between 2012-2021, the most representative median for waste generation corresponded to the Eugenio Espejo administration, with 141470 t/ year, with a metabolic waste rate of 2.45E-05 (t/year). On the other hand, the Tumbaco administration obtained 30217 t/year and 1.22E-05 t/year, respectively.

Resumen La composición orgánica del 65 % de residuos sólidos urbanos del Distrito Metropolitano de Quito proviene de restos de alimentos, lo que provoca efectos medioambientales negativos. El propósito de esta investigación es evaluar los factores que inciden en el desperdicio de alimentos en los hogares capitalinos y caracterizar la gestión de sus residuos sólidos urbanos. La investigación es cuantitativa de tipo exploratoria. Se realizó un análisis de asociación entre las principales variables categóricas mediante el cálculo del estadístico chi-cuadrado y una evaluación de correlación policórica. Se aplicaron análisis estadístico descriptivo y multiescala del enfoque del metabolismo social para caracterizar la gestión de residuos. Destaca la relación entre el gasto en compra de alimentos y bebidas no alcohólicas en el último mes -ingreso del hogar en el último mes (p valor < 5 %). Entre 2012-2021, la mediana más representativa de generación de residuos corresponde a la administración Eugenio Espejo, con 141 470 t/año, y su tasa metabólica de residuos de 2,45E-05 t/año. En contraste, la administración Tumbaco obtuvo 30 217 t/año y 1,22E-05 t/año, respectivamente.

Resumo A composição orgânica do 65 °% dos resíduos sólidos urbanos do Distrito Metropolitano de Quito provém de restos de alimentos, o qual provoca efeitos negativos ao meio ambiente. O objetivo dessa investigação foi avaliar os fatores incidentes no desperdício de alimentos nos lares da capital e caracterizar a gestão dos resíduos sólidos urbanos. A pesquisa foi quantitativa e exploratória. Fez-se uma análise de associação das variáveis principais com o cálculo do chi-quadrado estatístico e uma avaliação da correlação policórica. Usaram-se análises estadísticos descritivos e multiescala do foco do metabolismo social para caracterizar a gestão dos resíduos. Destacou-se a relação do gasto para a compra de alimentos e bebidas não alcoólicas no último mês -rendas do lar no último mês (p valor < 5 %). Entre os anos 2012-2021, a mediana mais representativa de geração de resíduos foi da administração Eugenio Espejo, com 141 470 t/ano, e uma taxa metabólica de resíduos de 2,45E-05 t/ano. Em contraste, a administração Tumbaco teve 30 217 t/ano e 1,22E-05 t/ano, respetivamente.

Abstract School environmental clubs function as an interdisciplinary open classroom, facilitating the exchange of knowledge with different actors from the community and school. The goal of this project was to connect the knowledge of students from the Zonda Agrotechnical School (San Juan province, Argentina) with the community through the school environmental club, aiming to raise awareness about local socio-environmental issues. To achieve this, an active-participatory methodology was employed through various participation workshops. As a result, concrete proposals and actions for recycling and conservation of resources were obtained. Environmental education through socio-educational practices in school clubs promotes awareness among students and the community regarding environmental issues.

Resumo Os clubes ambientais escolares funcionam como uma sala de aula interdisciplinar aberta, permitindo a troca de conhecimentos com diferentes atores da sociedade e da escola. O objetivo deste trabalho foi vincular o conhecimento dos alunos da Escola Agrotécnica Zonda, província de San Juan, com a comunidade através do clube ambiental escolar, para conscientizar sobre os problemas socioambientais locais. Para isso, utilizou-se uma metodologia ativo-participativa por meio de diferentes oficinas de participação. Como resultado, foram obtidas propostas e ações concretas para reciclagem e conservação de recursos. A educação ambiental, por meio de práticas socioeducativas no âmbito dos clubes escolares, promove a conscientização dos alunos e da comunidade sobre os problemas ambientais.

Resumen Los clubes ambientales escolares funcionan como un aula abierta interdisciplinaria, permitiendo el intercambio de saberes con distintos actores de la sociedad y la escuela. La meta de este trabajo fue vincular el conocimiento de los alumnos de la Escuela Agrotécnica de Zonda, provincia de San Juan, con la comunidad a través del club ambiental escolar, para lograr concientización sobre las problemáticas socioambientales locales. Para ello, se utilizó una metodología activa-participativa mediante distintos talleres de participación. Como resultado se obtuvieron propuestas y acciones concretas de reciclaje y conservación de los recursos. La educación ambiental, a través de prácticas socioeducativas en el marco de clubes escolares, promueve la concientización de los alumnos y la comunidad sobre las problemáticas ambientales.

Abstract: Over the years, the world has tried to increase the recycling of materials, especially those of artificial origin, this in order to produce compounds that are sustainable and sustainable. Among these materials, concrete stands out as a versatile element, to which different external agents can be added; however, since many of them are not compatible with aggregates, cement or water, can cause some alterations in their mechanical performance. Therefore, the present investigation addressed the study of an artificial material called Microporous Ethylene Vinyl Acetate (MEVA), in order to evaluate its influence on the mechanical properties of structural concrete. MEVA additions were used in ranges of 5.00 %, 10.00 %, 15.00 % and 20.00 % with respect to the volume of concrete, to analyze its behavior in the mix, both in physical and mechanical properties. The results show that the workability and unit weight are affected by the increase in MEVA. Despite this, the mechanical performance showed significant increases in the compressive strength of 8.81 %, tensile of 22.86 %, flexion of 24.51 % and modulus of elasticity of 2.12 %, with the addition of 5.00 % of MEVA after 28 days. Nevertheless, at higher doses there is a reduction in said strengths. For these reasons, it is concluded that the incorporation of MEVA at 5.00 % greatly improves the mechanical properties of concrete for structural use, in relation to the theoretical design strength of 21.00 MPa.

Resumen: A través del paso de los años, en todo el mundo se ha tratado de incrementar el reciclaje de materiales, sobre todo los de origen artificial, esto con la finalidad de producir compuestos que se sean sostenibles. Dentro de estos materiales destaca el concreto como un elemento versátil, al que se le puede añadir diferentes agentes externos; sin embargo, muchos de ellos al no ser compatibles con los agregados, el cemento o el agua, pueden provocar algunas alteraciones en su desempeño mecánico. Por lo expuesto, la presente investigación abordó el estudio de un material artificial llamado Microporoso Etileno Acetato de Vinilo (MEVA), con el fin de evaluar su influencia en las propiedades mecánicas del concreto estructural. Se utilizaron adiciones de MEVA en rangos de 5.00 %, 10.00 %, 15.00 % y 20.00 % respecto al volumen del concreto, para analizar su comportamiento en la mezcla, tanto en las propiedades físicas y mecánicas. Los resultados muestran que la trabajabilidad y peso unitario se ven afectadas ante el aumento de MEVA. A pesar de ello, el desempeño mecánico mostró significativos incrementos en la resistencia a la compresión en 8.81 %, tracción en 22.86 %, flexión en 24.51 % y módulo de elasticidad en 2.12 %, con la adición al 5.00 % de MEVA a los 28 días. No obstante, a mayores dosis existe una reducción de dichas resistencias. Por lo expuesto, se concluye en que la incorporación de MEVA en 5.00 % mejora en gran media las propiedades mecánicas del concreto para uso estructural, en relación a la resistencia teórica de diseño de 21.00 MPa.

Abstract: The pavement sub-base requires suitable materials for the necessary support. Traditionally, borrow material has been used, this generates environmental impact. This study analyzed the potential for reusing industrial waste ashes deposited in landfills. Laboratory tests were conducted by mixing the soil with different proportions of ashes. The relationship between soil moisture and dry weight was determined, and the C.B.R. (California Bearing Ratio) test was performed. The pavement thickness was calculated, keeping the same sub-base thickness. As the percentage of ashes increased, the soil quality decreased, but it still met the requirements for use as a sub-base. It is recommended to consider industrial waste ashes as a viable recycling material in pavement construction, which would reduce the environmental impact associated with their disposal in landfills.

Resumen: La sub-base del pavimento requiere materiales adecuados para el soporte necesario. Tradicionalmente, se ha utilizado material de préstamo, lo que genera un impacto ambiental. Este estudio analizó el potencial de reutilizar cenizas de desecho industrial depositadas en vertederos. Se realizaron ensayos de laboratorio mezclando el suelo con diferentes proporciones de cenizas. Se determinó la relación entre humedad y peso seco del suelo, se realizó el ensayo C.B.R. (California Bearing Ratio) y se calculó el espesor de pavimentos, con un mismo espesor de sub-base. A medida que aumenta el porcentaje de cenizas, la calidad del suelo disminuye, pero sigue cumpliendo los requisitos para ser utilizado como sub-base. Se recomienda considerar las cenizas de desecho industrial como un material de reciclaje viable en la construcción de pavimentos, lo que reduciría el impacto ambiental asociado a su disposición en vertederos.

ABSTRACT To contribute to knowledge development on global South sustainable entrepreneurship, this work describes how these entrepreneurs seek to sensitize and educate the local community about sustainable living through their business model. Three sustainable companies from the gastronomic sector in northwestern Mexico were studied, focusing attention on the experiences of entrepreneurs and their interactions in the social space. ATLAS.ti qualitative analysis tool was used to encode the text of the in-depth interviews. The results indicate that there are various ways that these entrepreneurs use to sensitize and educate the local community; for example, they raise awareness among their workers and clients about recycling, environmental care, adaptation to local conditions, the importance of changing habits of consumption, and especially of the diverse ways in which the ecosystem can be respected. For these entrepreneurs, sustainable development is a way of life that they share with their community through diverse actions of social interaction.

RESUMEN El artículo tiene como objetivo contribuir al desarrollo de conocimiento sobre emprendimiento sustentable de la región del sur global, describiendo las diversas formas en las que los emprendedores interactúan en el espacio social. Se estudiaron tres empresas sustentables del sector gastronómico del noroeste de México, centrando la atención en las diversas acciones de interacción social en la que estos emprendedores sensibilizan y educan a la comunidad local sobre vida sustentable a través de su modelo de negocio. Se utilizó la herramienta para análisis cualitativo ATLAS.ti para codificar el texto de las entrevistas. Los resultados indican que estos emprendedores concientizan a sus colaboradores y clientes sobre reciclaje, cuidado del medio ambiente, adaptación a las condiciones locales y modificar hábitos de consumo. Para estos emprendedores el desarrollo sustentable es un estilo de vida que comparten con su comunidad mediante diversas acciones de interacción social.

Abstract The research presents a compilation of the strategies for the handling and management of mercury (Hg) carried out by Japan as a promoter and manager of the Minamata Convention. This agreement was established to reduce anthropogenic mercury emissions and prevent pollution worldwide. Article 14 of the agreement focuses on cooperation between the governments involved and provides technical assistance. That is why the activities were developed in the training course “Capacity building for the ratification and implementation of the Minamata Convention on Mercury” carried out in Japan, in which representatives from Ecuador, China, Sudan, Brazil, and Armenia. Ecuador is one of the countries that ratified this agreement in 2013, which is why it is necessary to understand the efforts developed by other countries, with a practical perspective, to know their feasibility and implementation in the long term in the national territory. This study describes the activities implemented in Japan, such as processing contaminated waste in the company Nomura Kohsan Co., Ltd. (Hokkaido), to know high-tech centers such as the National Institute for Minamata Disease (NIMD) and the Ministry of the Environment (MEGJ), and a tour of the environmental restoration project in Minamata Bay. The results demonstrate that the actions and policies adopted in Japan have considerably reduced Hg emissions, maintaining them at stable levels, which ratifies compliance with the different articles outlined in the Minamata Convention. Although efforts have been made in Ecuador to combat illegal mining where Hg and assist in mining districts, it is still among the most polluting countries in the region. Private and government entities must put effort into action plans to mitigate pollution and carry out periodic monitoring of emissions of this metal.

Resumen La investigación presenta una recopilación de las estrategias en el manejo y gestión del mercurio (Hg) que realiza Japón como promotor y gestor del Convenio de Minamata. Este acuerdo fue establecido para reducir las emisiones antropogénicas de mercurio y prevenir su polución a nivel mundial. El artículo 14 del convenio establece la cooperación entre los gobiernos involucrados y la prestación de asistencia técnica. Es por ello que las actividades se desarrollaron en el curso de capacitación “Capacity building for ratification and implementation of Minamata Convention on Mercury”, llevado a cabo en Japón, en el cual participaron representantes de Ecuador, China, Sudán, Brasil y Armenia. Ecuador es uno de los países que ratificó en el 2013 este convenio, por lo cual es necesario comprender los esfuerzos desarrollados por otros países, desde una perspectiva práctica, para poder conocer su factibilidad y ser implementadas a largo plazo en el territorio nacional. Se describen las actividades implementadas, en Japón, como la recolección y procesamiento de residuos contaminados en la empresa Nomura Kohsan Co., Ltd. (Hokkaido), visita a centros de alta tecnología como el Instituto Nacional para la Enfermedad de Minamata (NIMD) y el Ministerio del Ambiente (MEGJ), y recorrido por el proyecto de restauración ambiental en la bahía de Minamata. Los resultados demuestran que las acciones y políticas adoptadas en Japón han reducido considerablemente las emanaciones de Hg llegando a mantenerlas en niveles estables, lo que ratifica el cumplimiento de los distintos artículos expuestos en el Convenio de Minamata. A pesar de que en Ecuador se han hecho esfuerzos para mitigar el uso de Hg, aun así, se encuentra entre los principales países contaminantes de la región. Las entidades privadas y gubernamentales deben esforzarse en planes de acción para mitigar la contaminación y llevar a cabo monitoreos periódicos de las emisiones de este metal.

ABSTRACT Finding sustainable methods for utilizing biosolids, also known as municipal sewage sludge (SS), presents a pressing challenge in modern waste management practices. Therefore, this study aimed to evaluate the impact of SS amendment on growth, biochemical, proximate, and heavy metal bioaccumulation parameters of berseem clover (Trifolium alexandrinum L.) fodder crop under field conditions. Trifolium alexandrinum was cultivated using different rates of SS mixing (i.e., T0: 0% as control with no SS application, T1: 5%, and T2: 10%). The results obtained showed a significant (p < 0.05) increment in growth, biochemical, and proximate parameters of T. alexandrinum with an increasing SS mixing rate. The highest productivity of T. alexandrinum fodder (1.92 kg m-2 fw) was observed in the T2 treatment as compared to the control treatment. The heavy metal analysis of shoot and root parts of T. alexandrinum showed that the contents (mg kg-1) of eight elements (Cd 0.02-0.13, Co 0.04-0.08, Cu 5.94-0.05, Cr 0.43-1.68, Fe 7.08-15.93, Ni 0.89-2.90, Mn 1.62-5.38, and Zn 3.30-7.04) increased significantly (p < 0.05) with SS mixing rate. The bioaccumulation factor (BAF) was below 1 except for Cu and Zn exhibiting their rapid uptake by plants from SS-treated soils. However, dietary intake modeling (DIM < 1) and health risk index (HRI < 1) studies showed that the levels of heavy metals did not exceed the permissible limits in any SS treatment. Overall, SS amendment has a positive impact on the growth, biochemical, proximate, and heavy metal characteristics of T. alexandrinum. Therefore, this study suggested a strategy for low-cost soil fertilization and fodder crop production which could sustainably benefit waste recycling.

Resumo O desenvolvimento da sociedade moderna nos grandes centros urbanos encontra-se atrelado a um sistema de consumo que vem carregado de problemas territoriais, políticos e socioambientais. Sendo o Brasil considerado o quarto maior gerador de resíduos sólidos do mundo, fica evidente a importância de ações estratégicas vindas de esferas públicas, privadas e sociedade civil que visem a melhores condições na gestão e à valorização desses resíduos. Diante disso, famílias e cooperativas atuam na catação e triagem de materiais recicláveis e podem ser conceituados como agentes de práticas sustentáveis. O presente artigo tem como objetivo investigar a interface entre a organização territorial e o desenvolvimento local juntamente com uma cooperativa de reciclagem. Para compreender as dinâmicas socioambientais desta pesquisa, construiu-se um portfólio bibliométrico que propiciou conhecimentos acerca de práticas da Economia Circular e catadores de materiais recicláveis. Para a coleta de dados, buscou a sustentação por meio da observação não participante e entrevistas estruturadas e semiestruturadas. Os resultados mostraram que o fortalecimento da cooperativa se desenvolve a partir de relações sociais instituídas nos entornos da cadeia de reciclagem. Conclui-se que, da viabilidade de relações dentro do território, podem surgir cenários que garantam a circularidade e transformação do resíduo, englobando aspectos voltados para sustentabilidade social, ambiental e econômica. encontrase encontra territoriais mundo públicas disso sustentáveis reciclagem pesquisa construiuse construiu dados semiestruturadas Concluise Conclui território resíduo social econômica

Abstract The development of modern society in large urban centers is linked to a consumption system that is loaded with territorial, political and socio-environmental problems. Since Brazil is considered the fourth greatest generator of solid waste in the world, the importance of strategic actions coming from public and private sectors and civil society that aim for better conditions in the management and valorization of this waste are highlighted. In the face of this, families act in the collection and sorting of recyclable materials, and they are often conceptualized as agents of sustainable practices. This article aims to investigate the intersection between territorial organization and local development within a recycling cooperative. In order to understand the socio-environmental dynamics on this research, a bibliometric portfolio was built that provided knowledge about Circular Economy practices and recyclable collectors. For data collection, support was sought through non-participant observation and structured and semi-structured interviews. The results showed that the strengthening of the cooperative developed from established social relationships in the surroundings of the recycling chain. It was concluded that, from the viability of relationships within the territory, scenarios may arise that guarantee the circularity and transformation of the waste, encompassing aspects aimed at social, environmental and economic sustainability. socioenvironmental socio problems world highlighted materials research collectors nonparticipant non participant semistructured semi interviews chain territory sustainability

Resumen El desarrollo de la sociedad moderna en los grandes centros urbanos está ligado a un sistema de consumo cargado de problemáticas territoriales, políticas y socioambientales. Siendo Brasil considerado eL cuarto mayor generador de residuos sólidos del mundo, es evidente la importancia de acciones estratégicas provenientes de los ámbitos público, privado y de la sociedad civil que apunten a mejores condiciones en la gestión y valorización de estos residuos. Ante esto, las familias y cooperativas actúan en la recolección y clasificación de materiales reciclables y pueden ser conceptualizadas como agentes de prácticas sustentables. Este artículo tiene como objetivo investigar la interfaz entre la organización territorial y el desarrollo local junto con una cooperativa de reciclaje. Para comprender la dinámica socioambiental de esta investigación, se construyó un portafolio bibliométrico para brindar conocimiento sobre las prácticas de Economia Circular y los recolectores de materiales reciclables. Para la recolección de datos se buscó apoyo a través de la observación no participante y entrevistas estructuradas y semiestructuradas. Los resultados mostraron que el fortalecimiento de la cooperativa se desarrolla a partir de las relaciones sociales que se establecen en torno a la cadena del reciclaje. Se concluye que, de la viabilidad de las relaciones dentro del territorio, pueden surgir escenarios que garanticen la circularidad y transformación de los residuos, englobando aspectos encaminados a la sostenibilidad social, ambiental y económica. territoriales socioambientales mundo público esto sustentables reciclaje investigación semiestructuradas territorio social económica