Até 2019 o curso se chamava Engenharia Ambiental, a partir de 2020 passou a se chamar Engenharia Ambiental e Sanitária http://repositorio.ufc.br/handle/riufc/24002 2026-06-11T18:11:30Z 2026-06-11T18:11:30Z Silva, Francisco Luanderson da http://repositorio.ufc.br/handle/riufc/84702 2026-02-11T11:13:51Z 2026-01-01T00:00:00Z

Título: Avaliação físico-química e ecotoxicológica de solos contaminados por resíduos sólidos urbanos no semiárido brasileiro Autor(es): Silva, Francisco Luanderson da Abstract: The improper disposal of municipal solid waste (MSW) in open dumps is a source of environmental degradation, with the potential to alter the physical and chemical properties of the soil and generate ecotoxicological effects on terrestrial organisms. The objective of this study was to evaluate soil contamination at the active landfill in the municipality of Crateús, Ceará, through the integration of physical-chemical analyses and ecotoxicological tests with seeds. Soil samples were collected at five points, three inside the landfill (P1, P2, and P3) and two outside (P4 and P5), 500 m and 2 km away, respectively. The samples were characterized in terms of pH, moisture, actual density, electrical conductivity, and particle size, following EMBRAPA methodologies. The ecotoxicological assessment was performed in accordance with ISO 11269-2, using seeds of Lactuca sativa and Allium cepa, maintained at 80% water retention capacity, a temperature of 23 ± 2 °C, and a 12-hour photoperiod. The pH values ranged from 7.7 to 8.9, characterizing alkaline soils, while moisture content was low (0.3 to 8.4%). Soil analysis in the landfill area revealed strong compaction, with actual density varying between 2.52 and 2.69 g·cm⁻³, and a predominance of the sand fraction, which decreases in the inner points. Ecotoxicological tests indicated that this contamination severely compromises plant development, especially Lactuca sativa, which showed a drastic reduction in germination (less than 50% at point P3) and a statistically significant delay in stem and leaf growth. A spatial gradient was observed: the closer to the disposal area (points P1, P2, and P3), the greater the phytotoxic effects, while distance from the contaminating source allows for attenuation of these impacts. In addition, the reduction in fresh and dry mass suggests that leachates and contaminants present in the soil cause physiological stress, interfering with water absorption and tissue production. It is concluded that the association between physicochemical parameters and biological responses evidenced the presence of phytotoxicity in landfill soils, demonstrating the effectiveness of the integrated approach for ecological risk assessment. Tipo: TCC

2026-01-01T00:00:00Z Nunes, Iago Furtado http://repositorio.ufc.br/handle/riufc/84683 2026-02-10T14:30:04Z 2026-01-01T00:00:00Z

Título: Avaliação fitotoxicológica e físico-química de solos sob influência de lixão ativo no município de Crateús-CE utilizando allium cepa e lactuca sativa Autor(es): Nunes, Iago Furtado Abstract: The inadequate disposal of municipal solid waste is one of the greatest environmental challenges in Brazil, especially in the northeast region, where the persistence of disposal in landfills compromises the quality of natural resources. Leachate, a polluting liquid that originates from decomposition of solid waste, can cause contamination by carrying heavy metals, salts, and organic compounds that infiltrate the soil. Given this scenario, the objective of this work was to investigate the environmental quality of the soil in the area of the active municipal landfill of Crateús, in Ceará, seeking to understand how the presence of these wastes alters the chemical characteristics of the soil and whether these changes can harm the initial development of plants and to evaluate the feasibility of phytotoxicological assays for monitoring the area. To perform this investigation, three collection sites were selected: two points located in the waste disposal area (P1 and P2) and a third point located about 500 meters away (P3), serving as a reference for soil in its natural state for comparison purposes. In the laboratory, physicochemical analyses of the soil were performed, and subsequently, the samples underwent an extraction process to remove the substances present, and the extracts obtained were tested on onion (Allium cepa) and lettuce (Lactuca sativa) seeds. The final extract was reconstituted with acetone, which is a solvent that can present toxicity in moderate to high concentrations; therefore, the ecotoxicological tests were performed with a 0.1% dilution of these extracts. Chemical analyses revealed that the landfill soil has some important alterations, such as the presence of arsenic at Point 1 at levels above the investigation value recommended by CONAMA Resolution No. 420, in addition to a high amount of salts and ammonium at Point 2, which is an older disposal area. However, when observing the behavior of the seeds, the results showed that the soil toxicity is low and does not affect the entire area equally. At Point 1, the seeds showed germination and initial root development. At Point 2, a difficulty in the growth of lettuce roots was noted, which seems to be more related to the excess of salts and soil salinity. The study concludes that, although there are warning signs in the chemical composition of the soil, such as arsenic and salinity, the potential to cause immediate damage to plants is small under the observed conditions. Tipo: TCC

2026-01-01T00:00:00Z Martins, Amanda Torres http://repositorio.ufc.br/handle/riufc/84664 2026-02-09T17:14:59Z 2026-01-01T00:00:00Z

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

2026-01-01T00:00:00Z Silva, Keven Thiarles da http://repositorio.ufc.br/handle/riufc/84646 2026-02-06T17:41:04Z 2026-01-01T00:00:00Z

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

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