Adsorbent Pseudo-First order Pseudo-Second order Reference qe k1 qe k2  Bentonite 0.72 0.0005 15.8 0.0059 [8] Red Rose 125 0.014 140.89 8.19 [9] Algal surface 4.35 0.016 7.73 0.009 [10] Zeolite/Bentonite 2.73 0.0008 N/A 0.0124 [11] Hydroxyapatite/Zeolit 2.378 0.128 5.333 0.12 [12] Saccharumbengalense 4.73 0.0454 4.62 0.024 [13] Activated Carbon 0.48 0.026 0.98 0.341 [14] This study [NaNO3]=0 mM 240.98 0.0913 229.89 0.0005 - This study [NaNO3]=10mM 210.46 0.0723 211.42 0.0005 -

Table 3: Comparison of Adsorption Kinetics Parameters for the Removal of Cobalt (II) ions.