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Table 5 Experimental and kinetic model coefficients for Na+ adsorption on natural and treated zeolite material

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

Zeolite form Exp. Pseudo-first order Pseudo-second order Elovich Equation
\( q_{e} \) (mEq/100 g) \( q_{e} \) (mEq/100 g) k 1 (min−1) SSE \( R^{2} \) \( q_{e} \) (mEq/100 g) \( k_{2} \) (mEq/100 g min) SSE \( R^{2} \) \( a \) (mEq/100 g min) \( b \) (mEq/100 g) SSE \( R^{2} \)
\( {\text{Natural}} \) 16.16 14.34 0.031 4.08 0.96 15.67 0.002 2.27 0.99 2.54 0.39 1.83 0.99
\( {\text{Ca}}^{2 + } \) 15.52 12.71 0.026 6.13 0.87 13.63 0.003 4.91 0.90 2.87 0.49 3.41 0.94
\( {\text{H}}^{ + } \) 20.40 17.90 0.030 10.29 0.84 19.20 0.002 7.72 0.88 27.43 0.20 7.43 0.95
\( {\text{K}}^{ + } \) 34.68 31.29 0.033 12.70 0.91 34.14 0.001 8.76 0.95 6.03 0.18 7.10 0.96
\( {\text{NH}}_{4}^{ + } \) 36.67 35.92 0.063 9.21 0.94 38.28 0.002 4.91 0.98 27.43 0.20 7.43 0.95