... determine an appropriate LA/AC-Fe ratio, the value of V/WACFe (V, the volume of drinkable water produced from the start using adsorbents until breakthrough / WACFe, the weight of AC-Fe in the ... also possible to realize that the longer the portion of AC-Fe, the higher the adsorbent cost. Therefore, optimizing the AC-Fe portion in the column is one of the key factors for a feasible ... experimental data as shown in the value of r2 for both LA and AC-Fe. In other words, this shows the applicability of the pseudo-second order kinetic model in predicting arsenic adsorption process...