Adsorption of emerging pollutants on lignin-based activated carbon: Analysis of adsorption mechanism via characterization, kinetics and equilibrium studies

•Lignin-based activated carbons were prepared by chemical activation with FeCl3.•The best-activated carbon described a high 1500 m2⋅g−1 specific surface area.•Maximum acetaminophen adsorption capacity at 655 mg·g−1.•Maximum acetamiprid adsorption capacity at 765 mg·g−1.•Both target compounds adsorbed in two layers on the activated carbon surface.