fig4
Figure 4. Effect of adsorbent dose on the removal of PFOA using 0.1 M ChCl-HC with 20 mM CaCl2 (Experimental conditions: PFOA concentration: 20 mg/L, Adsorbent dose: 20-600 mg/L, CaCl2: 20 mM, Temperature: 298 K, and RPM: 250). PFOA: Perfluorooctanoic acid; ChCl-HC: ChCl-modified hydrochar; RPM: revolutions per minute.
