http://memoria.ifrn.edu.br/handle/1044/107 2026-05-11T02:23:46Z 2026-05-11T02:23:46Z http://memoria.ifrn.edu.br/handle/1044/3217 2026-05-04T16:31:23Z 2025-08-15T00:00:00Z

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 2026-05-04T15:30:39Z 2026-04-09T00:00:00Z

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/1044/3205 2026-04-09T17:00:54Z 2026-01-30T00:00:00Z

História e memória da constituição do serviço social escolar na educação profissional federal Norte-Rio-Grandense (1962-1974) This study examines the process through which School Social Service was constituted and institutionalized within Professional Education in the state of Rio Grande do Norte between 1962 and 1974. It highlights the social, cultural, and historical factors that shaped this process, encompassing the institutional trajectories of the Industrial School of Natal, the Federal Industrial School of Rio Grande do Norte, and the Technical Federal School of Rio Grande do Norte, institutions that preceded the current Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Norte (IFRN). The dissertation is structured into two main analytical moments. The first investigates the historical and cultural formation of the Social Service professional who came to work in the school context, based on a bibliographical study. The second analyzes institutional documents, legislation, newspaper articles, and historical sources in order to examine and describe the implementation and institutionalization of School Social Service within the institution. The research adopts a historiographical approach grounded in the theoretical perspectives of Cultural History, the History of Educational Institutions, and School Culture. Methodologically, the study is based on the framework proposed by Rüsen (2015), drawing on Droysen’s systematic stages of heuristics, criticism, interpretation, and narrative construction. Data collection was conducted at the IFRN Natal-Central Campus Archive and included draft regulations, internal regulations, meeting minutes, ordinances, reports, and documentary files of former staff members from the period, with approval from the IFRN Research Ethics Committee. The study problematizes the assistentialist roots of the Social Service profession and the development of professional practices aimed at student assistance during the period, giving visibility to the main actors involved in this process. The findings indicate that, initially, student assistance was carried out not only by social workers but predominantly by educational counselors, both of whom were aligned with a school culture focused on student disciplinarization and assistentialism. From 1967 onwards, with the entry of new professionals, Social Service began to adopt a more critical and systemic approach, influenced by broader analytical perspectives and the modernization of the profession. The study also shows that changes in the school’s organizational structure gradually attributed to social workers the professional role of rights guarantors and administrators of social assistance benefits. It concludes that School Social Service became a fundamental component of student retention and student–family–school integration and that its institutionalization involved a transition from an assistentialist practice to one centered on the guarantee of rights, consolidating Social Service as an integral part of the historical memory and identity of Professional Education in Rio Grande do Norte.

2026-01-30T00:00:00Z http://memoria.ifrn.edu.br/handle/1044/3191 2026-03-26T12:05:09Z 2021-11-30T00:00:00Z

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