Efficient Removal of Methylene Blue Dye from Aqueous Solutions Through Adsorption Method onto Natural Banana Leaf Adsorbent

Methylene blue (MB) dye serves a dual role as both a stain and a pharmaceutical drug. Once dissolved in water, it takes on a striking blue. However, this seemingly innocuous dye carries potential risks, as exposure to it can lead to eye burns with the potential for permanent eye damage. Inhaling methylene blue dye may lead to respiratory problems, queasiness, throwing up, and cognitive disarray. As a result, the elimination of methylene blue dye from industrial waste has become an urgent issue for scientists. To address this issue in a sustainable and natural manner, an experiment was undertaken. The aim was to develop a cost-effective adsorption system to treat industrial effluents, thereby aiding in wastewater treatment. This research employed banana leaves as adsorbent material for the removal of methylene blue dye. The adsorbents were analyzed using scanning electron microscopy and Fourier transform infrared spectroscopy. This research represents a significant step toward addressing the challenge of large-scale methylene blue dye wastewater treatment through adsorption technology. In the case of banana leaves, an impressive 83.6% removal of MB dye was achieved under specific conditions, including a pH of 8, a contact time of 50 min, an agitation speed of 150 rpm, a temperature of 300 K, and 1 g of adsorbent in a 50 ml solution with an initial MB dye concentration of 25 ppm. The adsorption isotherm analysis revealed that the adsorption process followed the Langmuir model, with monolayer adsorption occurring under exothermic conditions. Furthermore, the experimental data consistently conformed to a pseudo-second-order kinetic model.