Ion-exchange of synthesized zeolite X pellets
Various ions were introduced into the synthesized zeolite NaX to obtain
zeolite M-NaX. Particularly, 25 g zeolite NaX pellets were immersed into
250 mL M(NO3)x (M =
Mg2+, Ca2+, Co2+,
Ni2+, Cu2+, Zn2+and Ag+) aqueous solution (0.1 mol/L) under vigorous
stir at 333 K for 6 h. The ion-exchanged zeolite X samples were washed
with deionized water for three times, separated by filtration and dried
in a vacuum oven at 373 K overnight.