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Fig. 2 | SpringerPlus

Fig. 2

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

Fig. 2

Adsorbed amounts of Na+ experimental, modelled and linear form of kinetic data for natural and treated zeolite materials. Initial Na+ concentration 0.1 M at pH 7, shaking speed of 300 rpm at 25 °C and solid–liquid ratio 50 g/L. The symbols are as follows: (circle) Natural zeolite form, (triangle) Ca2+ form, (square) H+ form, (cross) K+ form, (diamond) NH4 + form. a, d Pseudo-First kinetic order. b, e Pseudo-Second kinetic order. c, f Elovich. Each data point is a mean of two replicates, which did not vary by more than 5 %

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