Figure 3. (A and B) Adsorption kinetics; (C and D) adsorption isotherms of biochars for PFOA; and (E and F) adsorption thermodynamics of PBC-800 and CBC-800 for PFOA. PFOA: Perfluorooctanoic acid; PBC: pine sawdust-modified biochars; CBC: corn stalks-modified biochars.