Sk. Durrani et S. Amini, EFFECT OF NEUTRON AND GAMMA-RADIATIONS ON ZEOLITE AND ZEOTYPE MATERIALS, Journal of the Chemical Society of Pakistan, 17(2), 1995, pp. 61-70
The influence of gamma- and (n, gamma-radiation on the cation exchange
and the structure of zeolite and zeotype materials has been studied.
Samples were subjected to different doses of gamma-irradiation varying
between 0.5 and 10 MGy and Neutron irradiation flux varied from 1.14
x 10(17) to 3.88 x 10(17) n cm(.2). Structural effects consequent to g
amma-irradiation were examined by X-ray diffraction, electron scanning
micrograph and FTIR measurements. Neutron and gamma-irradiation did n
ot lead any appreciable change in the structure, however, the displace
ment cations to ''locked-in sites results partial reduced barium and c
aesium uptake. The decrease of the intensities of the absorption bands
of the hydroxy-groups reveals that gamma-irradiation has a strong deh
ydrating influence. The effect of gamma-radiation on UO22+ and Am3+ up
take into NH4-L and NH4-SAPO-34 was also observed. K-d of the uranyl i
ons increased with increasing pH up to 6.3. At pH> 3.5. the uranyl ion
s were precipitated, and consequently the K-d values were containued t
o increase.