Table 2 Effect of interfering ions on fluoride ion removal from aqueous solution by the activated carbon: NVNC
Serial No. | Adsorbent | Maximum extractability at optimum conditions | Extractability of fluoride ion in the presence of 50Â mg/l of interfering ions at optimum (pHs) | ||||
|---|---|---|---|---|---|---|---|
|  |  |  | Cl − | \( \mathbf{N}{\mathbf{O}}_{\mathbf{3}}^{\mathbf{\hbox{-}}} \) | \( \mathbf{S}\kern0.5em {\mathbf{O}}_{\mathbf{4}}^{\mathbf{2}\mathbf{\hbox{-} }} \) | \( \mathbf{H}\mathbf{C}{\mathbf{O}}_{\mathbf{3}}^{\mathbf{\hbox{-}}} \) | \( \mathbf{P}{\mathbf{O}}_{\mathbf{4}}^{\mathbf{3}\mathbf{\hbox{-} }} \) |
1 | NVNC | 92.0%, pH:7, 50Â min | 90.9%, pH: 7, 50Â min | 89.4%, pH: 7, 50Â min | 84.2%, pH: 7, 50Â min | 81.5% pH: 7, 50Â min | 79.3%, pH: 7, 50Â min |