The following equilibrium data was obtained for the adsorption of copper ions using a certain commercial adsorbent. rN=rKr[H][n] Test the data for pseudo first and second-order kinetics and evaluate k1 and k2 if the models are as follows: log(qeqt)=logqc2.303k1t (pseudo first-order model) q1t=k2qe21+qet1 (pseudo second-order model) where: q0 is the amount of copper ion adsorbed per gram of adsorbent at equilibrium (mg/g),qt is the amount of copper ion adsorbed per gram of adsorbent ( mg/g) at time t,k1 is the pseudo first-order rate constant ( min1 ) and k2 is the pseudo second-order rate constant ( g/mgmin). [20]