Sorption of simazine to corn straw biochars prepared at different pyrolytic temperatures

► Biochars were characterized via elemental analysis, BET-N2, FTIR and 13C NMR. ► Freundlich and dual-mode models described sorption isotherms well. ► Biochar produced at higher temperature had larger sorption capacity for simazine. ► Aromatic-rich biochars have high binding affinity to simazine. ► Dual-mode model results suggest adsorption contribution to total sorption.