Physical and chemical properties of acid activated clinoptilolite tuff
Keywords:
clinoptilolite tuff, acid activation, dealumination.Abstract
The paper presents results of investigation of physicochemical characteristics of clinoptilolite
tuff before and after treated by hydrochloric acid. Nature of the change in the composition, structure and
properties of the sorbent in the process activation was analyzed. It was noted the change in the order of
extraction of cations with increasing acid concentration. Established that treatment with hydrochloric acid
concentration of ≥ 4,0 M accompanied by a significant increase in the ratio of Si/Al. During acid
activation, occurs the redistribution of water in the structure of the sorbent and its increase in sorption
capacity. It was shown that the extraction of aluminum 5,0 M acid leads to partial amorphization of the
zeolite phase and the insignificant change in crystallinity
