The Adams–Bohart model for adsorption of As (III) was used to describe the initial section of the breakthrough curve using experimental. The respective values of k_AB (kinetic constant) and N_o (maximum uptake capacity) were computed using linear regression analysis on all breakthrough curves and are reported in Table 8. At any flow rates, there is no significant difference in the values of the k_AB and the N_o. As the bed depth deepens, the values of k_AB and N_o reduce. Furthermore, as the initial As (III) concentration rises, the value of k_AB falls and N_o rises. The model is described well by theory of surface reaction and posits that equilibrium attainment is not quick; as a result, the rate of uptake is in good accordance with both, the adsorbent's residual capacity and the concentration. Furthermore, the Adams–Bohart model is used in lesser concentration areas and where mass transfer limits the rate of uptake (López-Cervantes et al. 2018). According to Table 8, the actual breakthrough curves are not near to those expected by Adams–Bohart model, and the coefficient of regression (R²) values are low. As a result, in the range of utilised operating conditions and with present adsorbent, the model cannot be used to predict the experimental findings.