“…= ! (5) The values of qe and k1 are calculated from plotting the slope and the intercept respectively log(qe-qt) versus t (Demiral & Güngör, 2016;Fardjaoui et al, 2017;Feng, Guo, & Liang, 2009;Kankrej et al, 2017;Rajabi et al, 2016;Song, Wang, Chen, Zhang, & Dong, 2009;Subramani & Thinakaran, 2017;Wu & Wang, 2016;Yari et al, 2015;Zhang, Jin, Shen, Lynch, & Al-Tabbaa, 2018). Figure 4 shows the performance of this model.…”