One-step synthesis of magnetic biosorbent for the removal of methylene blue

In this paper, a facile co-precipitation method was used to prepare magnetic alkali-modified tea composites (MAT), and the low-cost adsorbent showed high adsorption performance for methylene blue (MB) in the aqueous solution. These adsorption experiments were carried out under different conditions, such as initial concentration, pH, MAT dosage, and temperature. The results showed that the adsorption capacity of MAT can reach 112.94 mg g(-1), which was higher than other biomaterials. The experiments of adsorption were designed by Design Expert Software and the optimal adsorption conditions were analyzed by ANOVA. The adsorption processes fitted the Langmuir isotherms well, and the pseudo-second-order equation was the best model to describe the adsorption behavior. It was potential material for the adsorption of MB.