TY - JOUR
T1 - Am3+ and Eu3+/alkali cation exchange selectivity on mordenite and zeolite L
AU - Tsuji, Masamichi
AU - Mimura, Hitoshi
N1 - Funding Information:
This research was supported by the Salt Science Foundation Grant No. 9939.
PY - 2000/12
Y1 - 2000/12
N2 - Am3+ and Eu3+/alkali cation exchange selectivity was studied on mordenite and zeolite L at 25 to 60 °C to examine the effect of their openings of ion-exchange sites. The corrected selectivity coefficient at the infinitesimal exchange increased in the order of Eu3+ < Am3+ on mordenite and Am3+ < Eu3+ on zeolite L. The selectivity reversal did not reflect the effect of the ionic form, but reflected the dimension of the opening of the ion-exchange site and charge of trivalent cations, since the crystal ionic radii of alkali cations were much smaller than the openings of these zeolites (7-8 Å).
AB - Am3+ and Eu3+/alkali cation exchange selectivity was studied on mordenite and zeolite L at 25 to 60 °C to examine the effect of their openings of ion-exchange sites. The corrected selectivity coefficient at the infinitesimal exchange increased in the order of Eu3+ < Am3+ on mordenite and Am3+ < Eu3+ on zeolite L. The selectivity reversal did not reflect the effect of the ionic form, but reflected the dimension of the opening of the ion-exchange site and charge of trivalent cations, since the crystal ionic radii of alkali cations were much smaller than the openings of these zeolites (7-8 Å).
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U2 - 10.1557/JMR.2000.0407
DO - 10.1557/JMR.2000.0407
M3 - Article
AN - SCOPUS:0034582741
VL - 15
SP - 2849
EP - 2856
JO - Journal of Materials Research
JF - Journal of Materials Research
SN - 0884-2914
IS - 12
ER -