Figures & data
Table 1. Mineralogy and particle size of raw materials
Table 2. Sample designation
Table 3. XRF analyses of raw materials
Figure 1. XRD Pattern for Kaolin and Metakaolin.
Figure 2. The XRD pattern for the samples crystallized for 3 h (for batch formulations containing bauxite).
Figure 3. XRD pattern of the control experiment with the as-synthesized zeolite varied with bauxite addition.
Figure 4. XRD pattern of the control experiment with the as-synthesized zeolite varied with feldspar addition.
Figure 5. XRD pattern of the control experiment with the as-synthesized zeolite varied with raw silica addition.
Table 4. Process conditions and XRD results of synthetic zeolites
Figure 6. The effect of varying the Si/Al on the crystallite sizes.
Figure 7. The FTIR of the control experiment and the synthesized zeolite samples containing 20 wt.% of bauxite, feldspar and silica respectively.
Figure 8. The FTIR of the control experiment and the synthesized zeolite samples containing 60 wt.% of bauxite, feldspar and silica, respectively.
Figure 9. The N2 adsorption/desorption isotherm of synthesized zeolite (Control experiment, C-7) nanoparticles.
Figure 10. SEM of (a) Zeolite A; (b) SEM of Zeolite A formulated with 60% Silica; (c) SEM of Zn exchanged Zeolite A.
Figure 11. EDX of (a) Zeolite-A; EDX of (b) Zn exchanged Zeolite-A.
Figure 12. Absorbance intensity curve at various time interval.
Figure 13. (a) Pseudo first-order; (b) Pseudo second-order.
Table 5. Parameters of kinetic models of MB adsorption on the adsorbent
Figure 14. (a) Langmuir Isotherm model; (b) Freundlich Isotherm model.
Table 6. The adsorption isotherm parameters
Table 7. The regeneration performance of the alkaline treated adsorbent
Figure 15. Regeneration of spent Zn-exchanged Zeolite A.
