Adsorption of 2, 4, 6-Trinitrotoluene on Aminoalky Cellulose in a Fixed Bed Column

The adsorption performance of aminoalky cellulose (AmAC) for 2,4,6-trinitrotoluene (TNT) was investigated in a fixed bed column. The fixed bed column parameters such as bed height, flow rate, influent TNT concentration were studied by a series of dynamic adsorption experiments. The result showed AmAC was an effective adsorbent for removal of TNT, and the equilibrium uptake increased from 27.76 to 36.18 mg/g when the bed height increased from 4.5 to 7.3 cm at flow rate of 10 mL/min and influent TNT concentration of 20 mg/L. The equilibrium uptake decreased from 3 8.01 to 22.03 mg/L with increasing of flow rate from 10 to 20 mL/min. As influent concentration increased from 20 to 80 mg/L, the equilibrium uptake increased from 31.69 to 52.20 mg/g. The minimum column height of 2.3 cm was calculated by the bed depth service time (BDST) at flow rate of 10 mL/min and influent TNT concentration of 20 mg/L.