Table 4.
Column studies of Cu(II) and Cd(II) ions on modified ACF for breakthrough adsorption capacities and model parameters.
| Metals | C0 (mg/L) |
Thomas = 
|
Adams-Bohart = 
|
Yoon-Nelson = 
|
||||||
|---|---|---|---|---|---|---|---|---|---|---|
| KTH (L/mg day) |
QTH (mg/g) |
R2 | KAB (L/mg day) | N0 (mg/cm3) |
R2 | KYN (/min) | τ (day) |
R2 | ||
| Cd(II) | 5.189 | 0.023 | 0.217 | 0.933 | 6.691E-09 | 15.609 | 0.915 | 0.000084 | 46 | 0.927 |
| Cu(II) | 4.768 | 0.020 | 0.233 | 0.896 | 6.117E-09 | 15.173 | 0.824 | 0.000064 | 51 | 0.896 |
(Ct and C0 = Concentrations of the adsorbate in the outlet and in the inlet, respectively; KTH= Thomas constant; QTH= maximum adsorption capacity (mg/g); m = mass of the adsorbent (g); KAB= Adam-Bohart’s constant, N0 = adsorption capacity of the adsorbent per unit volume of the bed, Z = bed height; U0 = superficial velocity; t = operating time; τ = breakthrough time; KYN= Yoon-Nelson’s constant)