Browsing by Author "Malla Aguilar, Evelyn Gabriela"

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    Precipitación química como una alternativa en la gestión de la Laguna de Busa: impacto en la flora y fauna acuática
    (Universidad de Cuenca, 2025-02-12) García Pizarro, Estefanía Carolina; Malla Aguilar, Evelyn Gabriela; García Ávila, Fausto Fernando
    Excess phosphorus promotes eutrophication, altering the natural balance of the aquatic ecosystem. The present investigation evaluated chemical precipitation with aluminum sulfate as an alternative for the management of the Busa lagoon and its impact on the flora (Schoenoplectus californicus) and aquatic fauna (Cyprinus carpio). The applied study with an experimental design used laboratory jar tests to determine the optimum dose of the coagulant. Among the main results, phosphorus concentration was reduced by 92.31% (from 0.13 to 0.01 mg/L) and water turbidity was significantly improved. However, through acid digestion it was found that the reduction of phosphorus concentration in the S. californicus species did not exceed 60%, showing limitations in the effective control of this invasive plant. As for the fauna, the toxicity of the residual aluminum concentration was estimated by means of the lethal effect, which caused a high mortality of 93.33% in C. carpio fry. In conclusion, chemical precipitation with aluminum sulfate was effective in reducing phosphorus levels and improving water quality; however, it did not contribute significantly to the reduction of phosphorus in the aquatic plant to prevent its growth, and had adverse effects on aquatic biodiversity, underscoring the need to implement an integrated approach that considers the ecological impacts before