Facultad Regional Resistencia

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Author: search.filters.author.Fontana, Gimena LiliánSubject: search.filters.subject.Methylene blue

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    Adsorption-desorption of methylene blue in a fixed-bed reactor filled with cotton industry waste
    (2020-02) Salamone, Cynthia; Tenev, María Daniela; Torre, Camila; Cleva, Mario Sergio; Fontana, Gimena Lilián; Gauto, Víctor Hugo; Sanches Riveros, Dania; Boeykens, Susana
    The agricultural economy of Chaco province, in Argentina, is based on cotton production, which generates a significant environmental impact due to the solid waste it produces. The textile industry, which utilizes large amounts of dye, chemicals, and water in its manufacturing process, exacerbates this impact. While adsorption is recognized as the most efficient method for color removal, the commonly used adsorbent, activated carbon, is costly. Therefore, there is a search for low-cost alternatives. In this study, a laboratory-scale fixed-bed reactor filled with cotton husk as the adsorbent material was employed to conduct breakthrough curves and assess the adsorption-desorption process of methylene blue. The experiments were conducted at 25°C with a flow rate of 80 ml/hr. The desorption capacity of three substances, namely NaCl 0.1 M, ethyl alcohol 50% V/V, and tap water, was evaluated. Remarkably, three adsorption-desorption cycles were achieved in all cases.These findings suggest that cotton husk could serve as a viable low-cost material for dye adsorption. Moreover, the fixed-bed column proved to be an effective reactor type for studying the adsorption-desorption process.
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    Cotton industry waste as adsorbent for methylene blue
    (2019-03-01) Tenev, María Daniela; Torre, Camila; Fontana, Gimena Lilián; Caracciolo, Néstor; Boeykens, Susana; Farías, Alejandro Rubén
    Removing dyes used in the textile industry from the water bodies is a relevant task because of the importance of their high toxicity. The cotton industry waste is a big problem in the final disposal. Waste cotton fibrils were studied as adsorbent material to treat the coloured effluents of the textile industry. Washing with boiling water was determined as the most efficient method for cleaning. The material was physical characterized. After that, methylene blue adsorption tests were carried out to review the dry removal process at different pH. The Langmuir isotherm and the pseudo-second kinetic order models best described this adsorption process. The results would indicate that the process involve a chemisorptions.