Application of Central Composite Design in the Adsorption of Ca(II) on Metakaolin Zeolite

Figure 1

FTIR spectra of metakaolin zeolites (C1, 4 h, 3 M NaOH zeolite; C2, 4 h, 5 M NaOH zeolite; and C3, 4 h, 1 M NaOH zeolite).