Agroindustrial Wastes of Banana Pseudo-stem as Adsorbent of Textile Dye: Characterization, Kinetic, and Equilibrium Studies

Autor: Raquel Aparecida Loss, Ingridy Alessandretti, Daniella Heleno da Silva, Cesar Vinicius Toniciolli Rigueto, Marieli Rosseto, Claudineia Aparecida Queli Geraldi
Rok vydání: 2021
Předmět:
Zdroj: Chemistry Africa. 4:1069-1078
ISSN: 2522-5766
2522-5758
DOI: 10.1007/s42250-021-00263-7
Popis: African continent stands out for its consumption and production of bananas, however, high amounts of waste are generated. In parallel is estimated that from 2019 to 2024 there will be a 5% growth of the textile industry in Africa, and in industrial textile processes, wastewaters containing toxic dyes are generated. Adsorption is a promising alternative technique for dye removal using agroindustrial wastes due to its low cost, wide availability, and high removal rate. Thus, this work aimed to evaluate the potential of the biomass of the banana pseudo-stem in the removal of the BF-5G blue reactive textile dye from the aqueous medium. The biosorbent showed a specific surface area of 10.08 × 10–2 m2 g−1, surface morphology with aligned and organized fibers, and a point of zero charge of 6.5. Batch adsorption tests were performed at pH 1, 30 °C, and 60 rpm. The equilibrium time was reached at 240 min, with 96% removal of the dye. The pseudo-second order and Elovich models can describe the kinetic behavior, while the equilibrium data tend to the Langmuir isotherm, with a maximum adsorption capacity in the monolayer of 72.21 mg g−1. In general, the banana pseudo-stem showed to be promising for use as a textile dye adsorbent, and therefore, we emphasize the need for further studies that promote the use of this waste widely generated in the African continent, for the manufacture of adsorbent materials with improved characteristics, contributing to scientific and technological development and reduction of environmental impacts.
Databáze: OpenAIRE
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