EVALUATION OF ADSORPTION ISOTHERMS OF BANANA PRATA PEEL (MUSA PARADISIACA) IN THE REMOVAL OF METYLENE BLUE TEXTILE DYE: A SUSTENTAINABLE APPROACH

Abstract

In the textile industry, the processing of fibers and the application of dyes require high water consumption, producing high rates of industrial waste. Dyes, in turn, are highly stable, which can result in highly contaminated effluents. If discarded incorrectly, this waste can cause serious problems to the environment and human health. In this sense, it is essential to decontaminate these effluents before releasing them into water bodies. To this end, the adsorption process has proven to be very effective in removing dyes from wastewater in the textile sector. Aiming at the optimization and economic viability of this process, the present investigation used an agro-industrial waste, banana prata peel (Musa paradisiaca), as an alternative biosorbent. Tests to determine pH were applied, indicating pH 9.0 as the most suitable for the procedure. Variations in adsorbent concentrations and mass were also evaluated to obtain the best use of the material in removing the methylene blue dye. The results obtained in biosorption tests indicated 99.5% removal, demonstrating treatment efficiency. The Langmuir model was the one that best adapted to the experimental data, presenting better linearity (R² = 0.98221) when compared to the Freundlich model (R² = 0.9687). In this way, the banana prata peel (Musa paradisiaca) presented itself as an efficient biosorbent in the adsorption of methylene blue dye, becoming a sustainable and low-cost alternative.