Production of Biochar from Keppaphycus Alvarezii (macroalgae) for the Removal of Eosin Yellow: Desorption, Kinetic, and Isotherm Studies

Dyes are mainly used in textile industries, owing to their usability they produce huge quantity of wastewater. Implication of best treatment technology for the treatment of textile wastewater is a concern globally. In this study, spent macroalgae Keppaphycus alvarezii was collected and converted into biochar at a temperature of 350 °C for removal of eosin yellow dye. The batch adsorption experiments were carried out by altering factors such as initial dye concentration, temperature, pH, contact time, and biochar dosage. At an initial dye concentration of 100 ppm, a contact time of 60 min, a temperature of 30 °C, a biochar dosage of 0.4 g, and a pH of 7, the best dye removal efficiency was 90.3