A circular economy (CE) promotes the reuse, reincorporation and valuation of waste and by-products under the framework of sustainable development through models and indicators that evaluate scenarios of second use and reduction in non-incorporated outputs to reduce negative externalities and pressures on the dimensions of development. A CE model applied to the transformation process of RFF in agro-industries is developed, which consists in the identification of the residue coefficients of EFB (22.48% ± 0.8), fiber (15.58% ± 0.49), husk (6.03% ± 0.66) and ash (0.55% ± 1.67). Subsequently, the valuation trends of potential second use were verified through a systematic review, which allowed the construction of the scenario of avoided costs of USD 678,721.5, a product of the total use of the outputs under bioenergy and nutrient source approaches. Finally, the RRSFM indicator was constructed, which can reach the level of 72% and a degree of improvement of 26% by 2026. In parallel, the HCRRS indicator revealed a reduction of 57.1%, 59.6% and 82.8% in emissions of t CO_2-eq product in the comparison of scenarios for the use of residues and by-products of palm oil from agro-industries in the Casanare Department.

In the present investigation, results obtained from the process of the biosorption of Zn(II) in synthetic wastewaters are presented, using three agricultural wastes (coffee pulp, banana pseudo-stem, and corncob). Firstly, the percentage of lignin and cellulose for each material was determined. Then, using the free software XLSTAT, the waste with the highest removal for this metal was selected and, after this, the optimum pH, kinetics, adsorption isotherm, and point of zero charge (pH_pzc) were found. Finally, a comparison with other lignocellulosic materials derived from banana, corn, and coffee crops was carried out. According to the results obtained, coffee pulp was the material that showed a high removal compared to the other two (63.58%), for which the optimum pH was 5.0 units. The kinetic model, which was adjusted to the process of biosorption, was the pseudo second order of Ho and McKay, which in turn presented an isotherm of Langmuir’s linearized model where the maximum adsorption capacity with that waste was 13.53 mg × g⁻¹, obtained with a particle size of 180 µm, contact time of 90 min at 100 RPM, temperature of 25 °C, and pH_pzc 3.95 units. Lastly, the authors state that this type of agricultural waste can be used as a green technology in the treatment of wastewater, particularly in the removal of the aforementioned pollutant, in order to fulfill goals 3.9 and 6.9 of the Sustainable Development Goals of the 2030 Agenda; to the level of challenge of the research, the authors propose for the future to carry out the implementation of this type of waste, without chemical modification, in the treatment of wastewater for the removal of the mentioned pollutant in a pilot study with different wastewaters and industries.

El estado de Guerrero es el primer productor de mango en México. Sin embargo, ocupa el último lugar en exportación. El objetivo del presente trabajo fue analizar las cadenas de comercialización de mango y el potencial de exportación en la Región Costa Grande. La metodología fue de naturaleza exploratoria y descriptiva con enfoque mixto cuali-cuantitativo; a través, de un diseño exploratorio secuencial en dos etapas. En agosto 2016-marzo 2017 se realizaron entrevistas semiestructuradas a actores clave del sistema producto mango en Guerrero y se aplicó un cuestionario estructurado a 84 productores de mango de seis municipios en la región. La información se analizó con los softwares SPSS versión 23 y Atlas.ti versión 6. Los resultados mostraron que los productores no han podido concretar una eficiente comercialización del mango a causa de distintos factores internos y externos como la desorganización, acaparamiento y falta de industrialización, problemas de plagas y enfermedades del cultivo, acceso a fuentes de financiamiento, entre otros. Además, todos los entrevistados mostraron interés en temas de exportación, pero solo cuatro cuentan con estándares necesarios para ese propósito. La identificación de las principales características de los productores y sus sistemas productivos, así como la comprensión de la cadena de comercialización de mango en la región aportará conocimiento para integrar de una manera más eficiente y eficaz el sistema producto mango.

Corporate social responsibility (CSR) has been the subject of extensive research, especially during the past two decades; however, few academic studies investigated the relationship between CSR and employee behaviour. This study reduces this gap by identifying the degree of association between CSR and the proenvironmental behaviour (PEB) of workers. These concepts were analysed among companies that are recognised as being socially responsible and others that are not; not enough empirical evidence was found to determine if these are positively affecting employee PEB in the Mexican context. The methodology was quantitative through questionnaires addressed to workers from renowned companies in Mexico, and analysed by using structural equation modelling (SEM) in AMOS software. Results showed that the CSR practices of the companies with a badge and the PEB of their workers are poorly related. The average of compliance with global CSR practices for companies that have a badge is less than or equal to that of those that do not. Conclusions indicate that CSR could occur only in declarative terms from the workers’ perception.

Organ donation and transplantation (ODT) represent essential strategies to address end-stage organ failure. However, global donation rates remain insuffici

Hazardous waste is generated by industrial activities and represents sources of pollution. The purpose of this investigation was to carry out a diagnosis of the handling, storage, and final disposal of the hazardous waste generated in 64 mechanical workshops in Acapulco, Guerrero, Mexico. A semi-structured questionnaire was applied to 64 people, with a non-probability sampling for convenience. As a result, it was observed that the workshops generate hazardous waste in the following quantities: used oil 27.98 kg/month; empty containers of oil, brake fluid, and antifreeze 25.43 kg/month; used oil filter 5.59 kg/month; solvent 5.50 kg/month; aerosol containers and paint containers 3.71 kg/ month; paint, solvent, and resin residues 3.10 kg/month; tow, cloth, and cardboard impregnated with oil 2.46 kg/month; residual fat 2 kg/month; batteries 1.86 kg/month. Respondents state that they are aware of the legislation; however, 45% of workshops deposit solid and hazardous waste as if they were for domestic use. Los residuos peligrosos se generan por actividades industriales y representan fuentes de contaminación. La finalidad de la investigación fue realizar un diagnóstico del manejo, almacenamiento y disposición final de los residuos peligrosos generados en 64 talleres mecánicos en Acapulco, Guerrero, México. Se aplicó un cuestionario semiestructurado a 64 personas, con un muestreo no probabilístico por conveniencia. Como resultado, se observó que los talleres generan residuos peligrosos en las siguientes cantidades: aceite usado 27.98 kg/mes; recipientes vacíos de aceite, de líquido de frenos y de anticongelante 25.43 kg/mes; filtro de aceite usado 5.59 kg/mes; solvente 5.50 kg/mes; envases de aerosoles o pinturas 3.71 kg/mes; residuos de pintura, de solvente y de resinas 3.10 kg/mes; estopa, trapo y cartones impregnados con aceite 2.46 kg/mes; grasa residual 2 kg/mes; baterías o acumuladores 1.86 kg/mes. Los encuestados afirman conocer la legislación; sin embargo, el 45% de los talleres deposita los residuos sólidos y peligrosos como de uso doméstico.