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Table 2 Diffusion models

From: Novel pre-treatment of zeolite materials for the removal of sodium ions: potential materials for coal seam gas co-produced wastewater

Model Non-linear equation Model parameters  
Intra-particle diffusion \( q_{t} = k_{i} t^{1/2}+C \) \( k_{i} \),\( C \) Equation 5
Film diffusion \( D_{f} = 0.23\frac{{r_{0} \delta q_{e} }}{{t_{1/2} }} \) \( D_{f} \) Equation 6
Pore diffusion \( D_{p} = 0.03\frac{{r_{0}^{2} }}{{t_{1/2} }} \) D p Equation 7