Table 6 Intra-particle diffusion model, film and pore diffusion values of Na+ ions for natural and treated zeolite material
Zeolite form | Intra-particle diffusion | Film diffusion | Pore diffusion | ||
|---|---|---|---|---|---|
k i (mEq/100 g*min1/2) | C (mEq/100 g) | R 2 | D f (cm2/s) | D p (cm2/s) | |
Natural | 1.262 | 1.40 | 0.99 | 2.96 × 10−5 | 5.70 × 10−5 |
Ca2+ | 0.43 | 4.23 | 0.82 | 2.66 × 10−5 | 5.70 × 10−5 |
H+ | 0.75 | 6.14 | 0.98 | 3.73 × 10−5 | 5.70 × 10−5 |
K+ | 1.792 | 7.69 | 0.93 | 4.23 × 10−5 | 3.80 × 10−5 |
NH4 + | 2.37 | 10.71 | 0.94 | 2.01 × 10−4 | 1.71 × 10−4 |