http://repositorio.ufc.br/handle/riufc/24003 Mon, 06 Apr 2026 16:26:52 GMT 2026-04-06T16:26:52Z http://repositorio.ufc.br/handle/riufc/84664 Título: Biopolímero de palma forrageira aplicado a solo para impermeabilização de base de aterro sanitário Autor(es): Martins, Amanda Torres Abstract: The adoption of base liner waterproofing systems in sanitary landfills plays an important role in protecting against the environmental impacts associated with the final disposal of solid waste, especially with regard to soil and groundwater protection. However, many available soils do not meet the permeability requirements established by technical standards, highlighting the need to seek alternatives capable of improving their geotechnical characteristics. In this context, this study investigated the hydraulic behavior of a biopolymer produced from the powder of forage cactus (Opuntia ficus-indica), applied to a soil collected from the municipal dumpsite of Crateús, Ceará, as well as analyzing different biopolymer contents mixed with the soil. To this end, tests of physical characterization, permeability, free swell index (FSI), compaction, and consistency limits were carried out, aiming to understand the effects of incorporating different biopolymer contents on the geotechnical properties of the analyzed local soil. The results showed that the addition of 5% of the biopolymer produced from forage cactus increased the soil consistency limits, in addition to reducing the maximum dry unit weight (γd,max) of the local soil from 1.82 g/cm³ to 1.64 g/cm³ and increasing the optimum moisture content (OMC) from 15.0% to 18.06%. Regarding the permeability coefficient, an increase was observed, with values ranging from 2.01 × 10⁻⁷ m·s⁻¹ to 1.42 × 10⁻⁶ m·s⁻¹, which makes its use in landfill base liner layers unfeasible. With respect to the soil expansibility index, the 5% biopolymer content showed an expansion of 57%, while the sample tested with kerosene exhibited an expansion of only 25%, since, due to its apolar and low-reactivity nature, kerosene interacts minimally with both the soil and the biopolymer, thereby restricting hydration and swelling. The results obtained indicate the need for adjustments in the cactus treatment process, such as mucilage extraction and crosslinking procedures, in order to make its application feasible in compacted soil layers intended for landfill waterproofing. Tipo: TCC Thu, 01 Jan 2026 00:00:00 GMT http://repositorio.ufc.br/handle/riufc/84664 2026-01-01T00:00:00Z http://repositorio.ufc.br/handle/riufc/84646 Título: Análise da gestão ambiental aplicada em empreendimentos turísticos sustentáveis: um estudo de caso do Sítio do Bosco em Tianguá-Ce Autor(es): Silva, Keven Thiarles da Abstract: The expansion of the tourism sector in ecologically vulnerable areas imposes the need for management models that transcend a purely economic vision, integrating ecological prudence as a strategic pillar. Under this premise, this monograph investigates the effectiveness of environmental management in promoting sustainability at the Sítio do Bosco enterprise, located in the Serra da Ibiapaba, in Tianguá-CE. Methodologically, the study is anchored in an exploratory-descriptive case study with a mixed-method approach (qualitative-quantitative), facilitated through data triangulation obtained via systematic in loco observations, semi-structured interviews with management, and the application of structured questionnaires to visitors. The results demonstrate that the enterprise operationalizes sustainability through high-impact technologies, such as photovoltaic energy generation and tertiary effluent treatment with a closed-loop water reuse system, in addition to circular economy practices in solid waste management. The analysis of tourist perceptions revealed that the environmental integrity of the site is the primary determinant of satisfaction and return intention, consolidating environmental management as a competitive differentiator and a factor of business resilience. It is concluded that Sítio do Bosco acts as a laboratory for replicable sustainable practices, proving that the strategic management of natural resources is capable of harmonizing biodiversity conservation with financial viability, strengthening the destination as a hub for responsible and conscious tourism. Tipo: TCC Thu, 01 Jan 2026 00:00:00 GMT http://repositorio.ufc.br/handle/riufc/84646 2026-01-01T00:00:00Z http://repositorio.ufc.br/handle/riufc/82260 Título: Produção do carvão ativado, a partir das podas do Ziziphus Joazeiro e avaliação da utilização no tratamento de efluentes residenciais de Crateús Autor(es): Alves, Alessandra Oliveira Timbó Abstract: The objective of this study was to evaluate the effectiveness of activated carbon obtained from the pruning of Ziziphus joazeiro for the treatment of domestic wastewater in Crateús, Ceará. The production of the activated carbon was based on the optimized conditions previously determined by Pereira (2021), using a Central Composite Rotational Design (CCRD) in conjunction with Response Surface Methodology (RSM), which enabled the production of carbon with lower cost and higher adsorptive efficiency. Subsequently, biofilters were constructed using stone materials, coconut fiber, and the synthesized activated carbon. The physicochemical analyses of the effluent showed that the biofilter with activated carbon was effective, resulting in an 87.7% reduction in biochemical oxygen demand (BOD), 35% in sulfates, and 27% in alkalinity. The morphological analysis of the activated carbon through Scanning Electron Microscopy (SEM) revealed a rough surface, irregular structure, and high porosity, with an average grain size of 3.46 µm and an average pore diameter of 21 nm, suggesting a predominance of mesopores. This configuration enhances adsorption efficiency. Furthermore, an increase in porosity was observed compared to the precursor material, demonstrating the effectiveness of the activating agent and the thermal process used. It can be concluded that plant-based activated carbon, especially that produced from Ziziphus joazeiro, represents a viable, sustainable, and technically efficient option for wastewater treatment. Tipo: TCC Wed, 01 Jan 2025 00:00:00 GMT http://repositorio.ufc.br/handle/riufc/82260 2025-01-01T00:00:00Z http://repositorio.ufc.br/handle/riufc/82199 Título: Índice de Segurança Hídrica na Bacia Hidrográfica dos Sertões de Crateús: riscos e desafios: um estudo aplicado à Bacia Hidrográfica dos Sertões de Crateús Autor(es): Lopes, Vanessa Maria Macedo Abstract: Water security is essential for sustainable development, especially in semiarid regions where surface and groundwater availability is limited and irregular. This study evaluated the Water Security Index (ISH) of the Sertões de Crateús River Basin, considering the human, economic, ecosystem, and resilience dimensions. Data on water availability and demand, urban supply coverage, irrigated areas, rainfall variability, and reservoir characteristics obtained from official agencies such as ANA, IBGE, and COGERH were used. The calculation of the indicators, according to the methodology of the National Water and Sanitation Agency, revealed significant variations among the municipalities: Crateús had an ISH of 3.75 (grade 4 – High), Independência 2.75 (grade 3 – Medium), Novo Oriente 1.75 (grade 2 – Low), Tamboril and Ipaporanga 1.50 (grade 2 – Low), and Quiterianópolis 1.75 (grade 2 – Low). These results highlight weaknesses in urban water supply, low artificial reservoir capacity, and vulnerability to climate variability. The conclusion is that structural actions are necessary, such as expanding reservoir capacity, diversifying supply sources, and strengthening integrated water resource management, to raise the indices to safer levels and ensure long-term resilience and sustainability. Tipo: TCC Wed, 01 Jan 2025 00:00:00 GMT http://repositorio.ufc.br/handle/riufc/82199 2025-01-01T00:00:00Z