Through investigating the changes of modified clinoptilolite
in crystal structure, molecular groups, the binding energy of
atoms, and Si, Al ligand state in the structure. It showed that the
concentration within 3 mol L1 does not influence the crystal
structure, coordination structure of Si and Al, skeleton structure
and silicon aluminium frame of clinoptilolite. Alkalis modification
mainly dissolves amorphous silicon in the clinoptilolite
framework and introduces metal ions into the clinoptilolite
framework by substitutions or adsorption, which will increase
the pore volume ratio of mesoporous and ammonia nitrogen
removal ability.