Table 2.
Parameters related to the kinetic models of HA adsorption on MNPs and SMNPs adsorbents
| Kinetic models | Parameters | Adsorbent | |
|---|---|---|---|
| MNPs | SMNPs | ||
| Pseudo first-order: ln(q
e
-q
t
) = lnq
e
-k
f
t
plot: ln(q e -q t ) vs. t |
q e, Cal (mg/g) | 9.7 | 15.81 |
| k 1 (min −1 ) | 0.014 | 0.057 | |
| h0 (mg/g. min) | 0.135 | 0.9 | |
| R 2 | 0.8417 | 0.9465 | |
| R adj 2 | 0.802 | 0.933 | |
| F error (%) | 3.8 | 1.93 | |
| Pseudo second-order: t/q
t
= t/q
e
+ 1/k
s
q
e
2
plot: t/q t vs. t |
q e,Cal (mg/g) | 11.1 | 15.72 |
| k 2 (g/mg) (min −1 ) | 0.006 | 0.01 | |
| h0 (mg/g. min) | 0.74 | 2.47 | |
| R 2 | 0.995 | 0.9985 | |
| R adj 2 | 0.994 | 0.995 | |
| F error (%) | 1.59 | 1.09 | |
| Intraparticle diffusion: q t = k i t 0.5 plot: q t vs. t 0.5 |
k id (mg/gmin 0.5 ) | 0.598 | 0.84 |
| C i (mg/g) | 2.724 | 4.86 | |
| R 2 | 0.8406 | 0.7332 | |
| Experimental qe (mg/g) | 10.5 | 15.22 | |