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Fig. 1

From: Synthesis of iron-modified montmorillonite/Al2O3 composite adsorbents and their phosphorus adsorption performance study

Fig. 1

(a) Comparison of phosphorus removal from iron-modified montmorillonite with different iron salt concentrations.The horizontal coordinates of the graph correspond to: Fe-1: 0.3 wt% iron salt solution, Fe-2: 0.5 wt% iron salt solution, Fe-3: 1 wt% iron salt solution, Fe-4: 2 wt% iron salt solution; (b) Comparison of phosphorus removal by adsorbents with different Fe-MMT addition methods.The horizontal coordinates of the graphs correspond to: 1: Fe-MMT added directly after mixing aluminum salt solution and lye, 2: Fe-MMT added to aluminum salt solution and then lye, 3: Fe-MMT added to hydrothermally heated böhmite solution, 4: calcined vs. 1, 5: calcined vs. 2, 6: calcined vs. 3; (c) Comparison of phosphorus removal by adsorbents with different theoretical Fe-MMT contents; (d) Comparison of phosphorus removal by secondary iron-modified adsorbents.The horizontal coordinates of the graph correspond to: 1: without secondary iron salt modification, 2: with secondary iron salt modification.

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