BACKGROUND AND OBJECTIVES: The textile industry is known to produce large amounts of dyes and other harmful contaminants. This issue is of great importance as it adversely affects both water resources and the well-being of organisms. To address this issue,
biochar is frequently used as a sustainable and environmentally friendly material for removing chemical contaminants during wastewater treatment. The aim of this study was to evaluate the viability of utilizing
biochar obtained from banana peels as a promising bioadsorbent for reducing environmental pollution caused by direct navy blue dye. The research investigated various factors such as temperature, potential of hydrogen levels, particle size, and concentrations to determine the effectiveness of
biochar in dye removal.METHODS: The
biochar obtained was separated into powdered and granular forms based on particle sizes of ۴۲۵ and ۸۵۰ micrometer, respectively. The biochar's textural characteristics were assessed through nitrogen adsorption/desorption isotherms. Fourier transform infrared spectroscopy and the Boehm method were employed to analyze and measure organic functional groups, specifically acidic groups, for identification and quantification purposes. Batch experiments were performed to ascertain the effects of the initial concentration and potential of hydrogen on the adsorption capacity and removal percentage.FINDINGS: The results indicated that the powdered
biochar obtained at ۵۰۰ degrees Celsius had the higher surface area, with a value of ۸۰.۴ square meter per gram. The
biochar demonstrated remarkable removal percentages, achieving ۹۷ percent at the lowest concentration and ۸۹ percent at the highest concentration, when the potential of hydrogen was adjusted to a value of ۶. The Freundlich model gave the best fit to the experimental data for this
biochar and obeyed pseudo second order kinetics, with correlation coefficients of ۰.۹۳ and ۰.۹۹, respectively. CONCLUSION: This study provides evidence of the high removal efficiency achieved by
biochar derived from banana peel waste in the removal of direct navy blue dye. Precise temperature control during the calcination process is essential to ensure its favorable chemical and textural properties. The unique attributes of banana peel
biochar position it as an exceptionally promising adsorbent material. Not only is it cost-effective and environmentally friendly, but it also outperforms current wastewater treatment technologies in terms of competitiveness. Its remarkable ability to reduce contaminants, particularly the removal of dyes, further solidifies its potential as a highly effective solution.
