Biochar from pineapple peel as an adsorbent for removal of metanil yellow dye in an Aqueous solution

In modern times, industries like the textile industry are using dyes excessively, leading to the release of large volumes of dye-containing wastewater. This poses a significant threat to the environment and human health. However, the use of agricultural waste can offer an affordable and environmentally friendly solution for removing dyes from wastewater. This study aimed to investigate the potential use of biochar from pineapple peel as an adsorbent for removing the Metanil Yellow dye from an aqueous solution. This study involved the preparation of biochar from pineapple peel using a furnace. Several factors affecting adsorption have been explored, including carbonization temperature, adsorbent dose, initial dye concentration, and contact time. The optimal conditions for adsorption were found to be a carbonization temperature of 700°C, an adsorbent dose of 1.5 g, and an initial dye concentration of 50 mg/L. The study also highlighted the significance of contact time, with 8 hours being identified as the optimal duration for achieving maximum adsorption efficiency. The Langmuir adsorption isotherm model was more suitable, with a maximum adsorption capacity of 1.475 mg/g and R2 = 0.9985, suggesting a monolayer adsorption process. These results demonstrate the effectiveness of pineapple peel biochar as an adsorbent for removing Metanil Yellow dye from aqueous solutions.