LAUSR

Abstract This work aimed at developing a highly porous polymeric lignin composite and to evaluate its adsorptive properties in batch and continuous experiments. Lignin has a strong dye-binding capacity due to its abundant phenolic and carboxyl groups, presenting a removal efficiency of 77% and an adsorption capacity of 8.1 mg/g. The novelty of this work was to develop a suitable lignin composite, with a dye removal efficiency of 80% achieved in batch using a 40% lignin composite (C0 = 40 mg/L and sorbent loading of 50 g/L). The continuous-flow operation was successfully carried out in a fixed-bed column operating at 3.0 mL/min and C0 = 40 mg/L with removal of 0.55 mg/g of lignin, which is promising in terms of generating added-value applications for lignin.