Romanian volcanic tuffs exploitation in environmental protection

摘要

The work presents data concerning genesis and occurrences of Romanian volcanic zeolitic tuffs, specifying a higher frequency of the following zeolitic types: stilbite, laumontite, clinoptilolite, heulandite, natrolite and mesolite. The volcanic tuff from Marsid-county Salaj-is one of the representative species of the volcanic tuff in Romania, having a clinoptilolite content ranging from 60