http://memoria.ifrn.edu.br/handle/1044/115 2026-05-06T12:05:31Z http://memoria.ifrn.edu.br/handle/1044/3217 Utilização de biocarvão para absorção de glifosato em meio aquoso Glyphosate, one of the most widely sold pesticides, is the active ingredient in over 750 broad-spectrum herbicides. Its application across large crop areas and potential overuse, have led to it being frequently researched in scientific literature. Although it is not classified as extremely toxic, there is growing global attention to its potential direct and indirect health effects. Adsorption is a promising route for glyphosate removal, and materials derived from agricultural waste, such as green coconut husks, are emerging as a sustainable alternative. Brazil is one of the world's largest coconut producers, generating millions of tons of unused green coconut husks annually—up to 3 million tons per year. These husks represent a vast lignocellulosic resource that can be converted into biochar through heat treatment. The main objective of this study was to evaluate the efficiency of biochar produced from green coconut husk waste as a biosorbent in removing glyphosate from aqueous media. The results and discussions demonstrated that all biochar samples were satisfactorily obtained through the pyrolysis process. The adsorption efficiency of sample A7 was 84.36%. Glyphosate adsorption increased rapidly at low concentrations and more slowly until the sites on the adsorbent surface were saturated. Both the Langmuir and Freundlich models presented excellent fits to the data, which is consistent with the most recent literature, indicating that glyphosate adsorption on biochar may involve multiple mechanisms, including electrostatic attraction, physical pore trapping, and size exclusion. EDS analyses indicated changes in elemental 2 composition (reduction of carbon and oxygen and appearance of phosphorus) in the post-adsorption samples, attesting to the effectiveness of the glyphosate adsorption process. In conclusion, the results obtained indicate that green coconut shell biochar has promising potential as an adsorbent for glyphosate removal in aqueous media. The high adsorption efficiency observed with a small mass of adsorbent suggests that large quantities of biochar would not be necessary for the treatment of contaminated water, contributing to the water treatment process and to the promotion of sustainable Brazilian agriculture, with responsible consumption and production. 2025-08-15T00:00:00Z http://memoria.ifrn.edu.br/handle/1044/3216 Plano de logística sustentável no TCE-RN : práticas, desafios e contribuições para a administração pública 2026-04-09T00:00:00Z http://memoria.ifrn.edu.br/handle/1044/3191 Diagnóstico ambiental de propriedades rurais: um estudo na comunidade Malhada, município do Crato - CE Coexistence with the Brazilian Semiarid region demands the guarantee and permanence of people in rural activities with dignity. Thus, small rural properties become the protagonists of the scenario for the development of family farming, based on sustainable development. However, it is necessary to see that the traditional agricultural system is still predominant. The objective for this study was then defined as the environmental diagnosis of four rural properties in the Malhada community, in Crato – CE. The methodology involved literature review; photographic records, and field observations. Data were obtained from field research with application of interviews having as a sample the four representatives of family properties. The results identified that the practices and actions adopted in rural family farming activities contribute to the contamination of surface and underground waters, and to the decrease in the productive capacity of soils, with regard to the use of chemical inputs. It was found that the conduct of farmers regarding the purchase, handling and application of agrochemicals, as well as the final destination of packaging and solid waste in general is a failure. Domestic sewage is released into the ground in a precarious way and susceptible to contamination. Surface water reservoirs such as the Rio Carás and dams were identified to help during the dry season. It is concluded that the diagnostic data revealed the need for a fundamental environmental planning to guide strategies to minimize the effects of degradation of the local ecosystem on the behavior and anthropic interferences, in the perspective of the human-nature relationship. 2021-11-30T00:00:00Z http://memoria.ifrn.edu.br/handle/1044/3190 Plataforma online de caráter didático destinada ao dimensionamento de sistemas de microgeração fotovoltaica This study presents the development of a web-based software designed to automate the sizing of photovoltaic microgeneration systems. The tool features intuitive interfaces and accessible language, aiming to enable users without prior technical knowledge to carry out the sizing process, while also serving as a didactic resource. The software development was grounded in both technical and practical knowledge of photovoltaic technology, as addressed in specialized literature and scientific publications, which provided the theoretical foundation – especially regarding the mathematical models employed and the educational approach adopted in the project. The methodology is characterized as applied, qualitative-quantitative, and bibliographic research, focused on the educational automation of photovoltaic system sizing, based on technical, scientific, and academic sources. As a result, a fully functional version of the software was developed, capable of automating the sizing process through responsive and user-friendly interfaces, suitable for both desktop and mobile devices. The application seeks to convey the sizing process in an educational and accessible manner, reaching a broad audience and promoting photovoltaic technology along with its social and environmental benefits. Through interactive interfaces, illustrative visual elements, and clear language, the software has the potential to be used as a didactic tool in academic contexts, while also contributing to the feasibility of residential photovoltaic microgeneration, encouraging distributed generation as a sustainable alternative. Given that similar software solutions currently available require specialized technical knowledge, the developed software stands out as innovative by combining automated sizing with an integrated learning experience and high usability, thereby expanding access to users of diverse profiles. 2025-09-12T00:00:00Z