Dissertação Mestrado Profissional em Tecnologias Ambientais

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Navegando Dissertação Mestrado Profissional em Tecnologias Ambientais por Autor "Aquino, Nathaly Costa de"

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    Produção de substrato a partir de resíduos de manga rosa para adsorção de misturas de semioquímicos
    (INSTITUTO FEDERAL DE ALAGOAS - Ifal, 2026-01-02) Pereira, Sara Souza; Aquino, Nathaly Costa de; https://orcid.org/0000-0002-2785-591X; http://lattes.cnpq.br/8050425431023649; Freitas, Johnnatan Duarte de; https://orcid.org/0000-0002-6977-3322; http://lattes.cnpq.br/4999402869058858; Freitas, Alan John Duarte de; https://orcid.org/0000-0001-9673-7338; http://lattes.cnpq.br/7222112856028905; Nascimento, Ruth Rufino do; https://orcid.org/0000-0002-2005-4941; http://lattes.cnpq.br/7975227032836139
    Fruit farming occupies a prominent position in the Brazilian economy, contributing significantly to the domestic market and exports; however, it is severely impacted by insect pests, especially Anastrepha obliqua, responsible for significant losses, mainly affecting fruit crops such as mango, cajá, and seriguela. The control of these pests has traditionally been based on the intensive use of chemical pesticides. In this context, the adoption of more sustainable strategies, such as Integrated Pest Management (IPM), demands the development of new technologies that reconcile efficiency in control and reduction of environmental impacts. This work aimed to develop and evaluate an adsorbent substrate based on pink mango peel waste, associated or not with chitosan, intended for the adsorption and controlled release of semiochemical mixtures formed by the combination of male sex pheromones and kairomones from pink mango. Mango peel powder in green and mature stages was used, as well as hybrid formulations containing 50% peel and 50% chitosan. The evaluated synthetic mixtures of semiochemicals (M1, M2, M3, and M4) were formulated from compounds previously identified through electroantennography (α-pinene, β-myrcene, camphene, sabinene, linalool, 1-heptanol, (Z)-3-nonen-1-ol, and α-farnesene). Physicochemical characterization was performed using Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetric Analysis (TG), and Differential Scanning Calorimetry (DSC). SEM analyses revealed irregular surfaces and high roughness in the mango peel powders and chitosan. FTIR spectra indicated the presence of similar polar functional groups among the materials, mainly hydroxyls (-OH), carbonyls (C=O), and amines (-NH₂). TG results demonstrated similar mass loss profiles for green and ripe pink mango samples. DSC analysis allowed the identification of thermal events. The results indicated that the green pink mango peel powder, especially in the hybrid matrix with chitosan, is more efficient in highlighting the semiochemicals of the mixtures, particularly the M2 mixture.