SELEKTIVNOST' IONOOBMENNOY SORBCII CEZIYA-137 NA SIL'NOKISLOTNYH KATIONITAH IZ VODNYH RASTVOROV SOEDINENIY SCHELOCHNYH METALLOV
Authors:
1.
KNITU
2.
RHTU im. D.I. Mendeleeva
3.
RHTU im. D.I. Mendeleeva
4.
RHTU im. D.I. Mendeleeva
Type:
Article
Pages:
from 75
to 77
Status:
Published
Received:
19.04.2023
Accepted:
01.08.2025
Published:
01.08.2025
Subject area:
UDC 539.163:541.183
Language:
Russian
Keywords:
селективность катионообменной сорбции цезия-137, сильнокислотные катиониты, cesium-137, ion-exchange selectivity, strongly acidic cationites
Abstract (English):
The basic ion exchange characteristics for alkali and salt solutions of monovalent metals on sulphocationites are studied. It is found that the value of the constant exchange capacity for the sorption from alkaline solutions on the sulfonic acid cation exchangers KU- 2 and NRW-100 is achieved in less than 2 minutes. In the case of sorption from salt solutions the equilibrium takes about 5 minutes for the domestic cationite KU-2 and 2 minutes for NRW-100. The values of ion exchange equilibrium constants from aqueous solutions of nitrates do not exceed 1.3 . The use of a mixed ionite bed allows getting complete cation exchange capacity due to the irreversibility of the process. The separation coefficients for the cesium-lithium (sodium, potassium) pairs are measured in static conditions. Preferred ion exchange sorption of cesium-137 in relation to the other alkali metals under dynamic conditions is shown.
The basic ion exchange characteristics for alkali and salt solutions of monovalent metals on sulphocationites are studied. It is found that the value of the constant exchange capacity for the sorption from alkaline solutions on the sulfonic acid cation exchangers KU- 2 and NRW-100 is achieved in less than 2 minutes. In the case of sorption from salt solutions the equilibrium takes about 5 minutes for the domestic cationite KU-2 and 2 minutes for NRW-100. The values of ion exchange equilibrium constants from aqueous solutions of nitrates do not exceed 1.3 . The use of a mixed ionite bed allows getting complete cation exchange capacity due to the irreversibility of the process. The separation coefficients for the cesium-lithium (sodium, potassium) pairs are measured in static conditions. Preferred ion exchange sorption of cesium-137 in relation to the other alkali metals under dynamic conditions is shown.
Keywords:
селективность катионообменной сорбции цезия-137, сильнокислотные катиониты, cesium-137, ion-exchange selectivity, strongly acidic cationites
селективность катионообменной сорбции цезия-137, сильнокислотные катиониты, cesium-137, ion-exchange selectivity, strongly acidic cationites
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