Technetium removal from the aqueous solution using zeolites A and Y containing transition metal ions Co.sup.2+ and Zn.sup.2

The adsorption properties of two zeolite types, faujasite (NaY, ZnY, CoY) and LTA-4A zeolite (NaA, ZnA, CoA), towards technetium were studied in batch static experiments. The Si/Al ratio, acidity, dealumination, chargebalance cations of zeolite, contact time and temperature determined the adsorption...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 2018-07, Vol.317 (1), p.215
Main Authors: Hercigonja, Radmila V, Vranjes-Djuric, Sanja D, Mirkovic, Marija D, Markovic, Bojana M, Maksin, Danijela D, Markovic, Bojana N, Nastasovic, Aleksandra B
Format: Article
Language:English
Subjects:
Adsorption
Nuclear energy
Zeolites
Zinc compounds
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Summary:The adsorption properties of two zeolite types, faujasite (NaY, ZnY, CoY) and LTA-4A zeolite (NaA, ZnA, CoA), towards technetium were studied in batch static experiments. The Si/Al ratio, acidity, dealumination, chargebalance cations of zeolite, contact time and temperature determined the adsorption efficiency. The maximum removal efficiency of 98.8% and K.sub.d value (2.06 x 10.sup.-4 cm.sup.3 g.sup.-1) was achieved using CoY (zeolite type Y). The kinetics of technetium adsorption followed the pseudo-second order model. The TcO.sub.2 adsorption is mainly due to the hydrogen bonds between protons of the zeolitic structural OH groups (Bronsted acid center) and oxygen from the TcO.sub.2.sup.-.
ISSN:0236-5731
DOI:10.1007/s10967-018-5893-2