Abstract
One of the industries that uses water is textile dyeing, which during the dyeing and finishing process generates significant amounts of (color) effluent. In this study, Plackett-Burman design was used to identify the key factors influencing the adsorption of dye onto biomass. Biosorption modeling was used to optimize the adsorption of Crystal violet, a textile dye effluent, onto the dry biomass of Sargassum latifolium. The Plackett-Burman design was used in the current study to determine the significance of four factors, including pH, time, doss adsorbent, and dye concen-tration. To improve the experimental conditions, a batch process was used to test the initial concentration of Crystal violet (5-100 mg/L), contact time (10-240 min), pH (3-11), and adsorbent dosage (0.1-3.2 g). The raw material was further examined using Fourier transform infrared (FT-IR) and scanning electron microscopy (SEM). The different functional groups present in the presented samples, according to IR spectrum analysis, are OH stretching, CH stretching, C=C stretching, and C-O stretching. The highest decolorization was achieved utilizing the S. latifolium design at 180 min, pH 7, 1.6 g of adsorbent, and 10 mg/L of initial dye concentration. The experimental data were fitted to the Langmuir, Freundlich, and second-order kinetic equa-tions. S. latifolium dry biomass might be employed as a cost-effective and efficient adsorbent for removing Crystal violet from polluted water, and the method is also practical, safe, and envi-ronmentally friendly.