3. Results and discussion
3.1. Effect of NaOH modification on the physicochemical properties
of clinoptilolite
3.1.1. Dissolution ions in the solution after modified by different
concentrations of NaOH
Potassium, calcium, sodium, magnesium, aluminum and silicon,
etc are the main components of the clinoptilolite. Table 2 showed
the dissolution ions in the solution after clinoptilolite modified by
different concentrations of NaOH, which measured by ICP-OES. As
the NaOH concentration increasing from 0.10 to 3.00 mol/L, the
contents of K, Al and Si sharply increased but Ca increased slightly
while Mg element has not been detected after modification. There
were some small differences between clinoptilolite modified by
different concentration of NaOH. As the priority exchange ion order