Volume 18 Issue 1

S.No.	Article Title & Authors (Volume 18, Issue 1, February - 2025)	Page Nos.	Status
1.	Proposal for a Sanitary Landfill Closure Plan Model Using Multi-Criteria Decision Support Tool Karina Albuquerque da Silva and Ana Bárbara de Araújo Nunes International Journal of Advances in Engineering & Technology (IJAET), Volume 18 Issue 1, pp. 1-14, February 2025. ABSTRACT The closure of sanitary landfills is a critical issue due to the environmental and social impacts they generate. This study proposes a closure plan based on a multicriteria decision support tool, considering environmental, economic, and social criteria. The methodology includes identifying relevant criteria, defining alternatives, applying the multicriteria tool, and selecting the best strategy. The approach seeks to minimize impacts, promote public safety, and address local demands, contributing to more sustainable practices in solid waste management. The study employed a descriptive, explanatory, and exploratory methodology, consulting experts to validate the steps of the closure process. Using the SNOWBALL technique, 10 specialists from various fields, including environmental engineering, biology, and governmental agencies, were selected. The results highlighted a consensus among university professors and the diverse perceptions of professionals from academic and industrial sectors. The participation of an environmental engineer linked to an industrial construction company brought a practical perspective, connecting academic theory to private sector needs. The proposed plan model follows guidelines covering phases from diagnosis to post-closure maintenance, focusing on rehabilitating the area and integrating it into the community. Continuous monitoring reinforces environmental responsibility, ensuring the process's sustainability. Thus, the study offers a strategic model for the closure of sanitary landfills, aligned with contemporary demands for responsible and efficient environmental management.	1-14	Online
2.	Effects of Plasma Nitriding and Duplex Treatments on the Corrosion Resistance of UNS S32760 Stainless Steel Paulo R. Q. de Almeida; Petteson L. C. Serra; Felipe C. Silva; Weslley R. V. Sampaio6; Renan M. Monção; Marcos C. S. Brito; Ediones M. de Sousa; Wênio F. A. Borges; Oscar M. P. Ramirez; Hercílio G. de Melo; Cláudio G. Schön; Thércio H. C. Costa; Rômulo R. M. Sousa International Journal of Advances in Engineering & Technology (IJAET), Volume 18 Issue 1, pp. 15-28, February 2025. ABSTRACT UNS S32760 super duplex stainless steel has excellent corrosion resistance and mechanical properties that are superior to those exhibited by austenitic and ferritic stainless steels, but which can still be improved by surface treatments. However, due attention should be paid to the corrosion resistance properties. Thus, the aim of this work is to investigate the effect of plasma nitriding and the duplex treatment on the corrosion resistance of UNS S32760 steel. A conventional plasma nitriding treatment lasting 4 and two duplex treatments were studied, which repeated the nitriding and then subjected to the deposition of titanium nitride films for 2 h and 4h using the cathode cage plasma deposition technique. The temperature used in all treatments was 723 k. The samples were evaluated by Optical Microscopy, Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS) maps, X-ray Diffraction with routine application of Rietveld, Vickers Microhardness and Rockwell indentation adhesion test. The sample subjected only to nitriding treatment presented the highest surface hardness, 4.06 times higher than that presented by the base material. In the samples submitted to the duplex treatment the presence of stoichiometric titanium was observed on the nitride layer. The corrosion tests revealed on sample NC4 evidenced the positive effect of plasma nitriding on corrosion resistance.	15-28	Online