Table 5 Ion radius, hydrated radius, and diffusion coefficient of ions.

From: Layered double hydroxides in nanofiltration as a new approach to nitrate removal

Ions

Ionic radius (nm)

Hydrated radius (nm)

Diffusivity coefficient (\(\:\frac{{{m}}^{2}}{{s}}\))

Na+53

0.10

0.36

1.33 × \(\:{10}^{-9}\)

Mg2+53

0.07

0.43

0.71 × \(\:{10}^{-9}\)

Cl−53

0.18

0.33

2.03 × \(\:{10}^{-9}\)

\(\:{SO}_{4}^{2-}\)53

0. 29

0.38

1.07 × \(\:{10}^{-9}\)

\(\:{NO}_{3}^{-}\)58

0.18

0.34

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