Abstract
Environmental issues arising from industrialization and urbanization have grown in frequency and complexity in recent decades. The textile sector is the largest user and generator of dye-laden wastewater, despite its widespread use in several industries. The study explored the adsorption of Crystal Violet (CV), which is typically found in textile wastewaters, onto Peanut Hull Powder (PHP). Batch tests were done depending on the initial solution pH (2-10), contact period (10-90 minutes), temperature (15-40C), adsorbent dose (0.5-3 g), and adsorbent particle size (150-1180 µm). Depending on the point of zero charge (pHpzc), the optimum value of pH for the solution is above 4.6. The best parameters for removing Crystal Violet with PHP were pH = 6, temperature of 25°C, 1.5 g of adsorbent, and particle size of 150 µm. The greatest elimination percentage was 95% at a CV concentration of 20 mg/L. The study found that PHP is a viable and inexpensive adsorbent for the adsorptive removal of CV dye from colored wastewater, with a dye removal percentage of 95%.