3.2.3. Influence of NaOH on coordination structure of Si and Al
Figs. 6 and 7 showed the 29Si MAS NMR spectrum and 27Al MAS
NMR of clinoptilolite modified by 1.00 mol L_1 and 3.00 mol L_1
NaOH. The results suggest that the coordination structure of Si and
Al changed little and indicate that the alkali modification have little
impact on the skeleton structure of clinoptilolite