2.5. Adsorption kinetics
For the measurement of the time-dependent uptake of MTBE onto different polymeric adsorbents, 0.5g adsorbent was intro- duced to a 500-ml flask with glass stopper containing 500 ml MTBE aqueous solution with known concentration. The flask was placed in a constant temperature incubating shaker at 25 ◦ C. Aqueous sam- ples were withdrawn from the flask at different time intervals. The concentration of residual MTBE was determined and the adsorption amount was calculated according to the following equation:
(C0 −Ct)V
qt= M (2)
where qt is the adsorption amount at time t (mgg−1), C0 is the initial concentration of MTBE solution (mg l−1 ), Ct (mg l−1 ) is MTBE concentration at time t, V is the volume of MTBE solution (l), and M is the mass of polymeric adsorbent (g).