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https://dspace.ffh.bg.ac.rs/handle/123456789/1848| Title: | Technetium removal from the aqueous solution using zeolites A and Y containing transition metal ions Co<sup>2+</sup> and Zn<sup>2+</sup> | Authors: | Hercigonja, Radmila Vranješ-Djurić, Sanja D. Mirković, Marija D. Marković, Bojana M. Maksin, Danijela D. Marković, Bojana N. Nastasović, Aleksandra B. |
Keywords: | Adsorption;Kinetics;Technetium;Zeolite | Issue Date: | 1-Jul-2018 | Journal: | Journal of Radioanalytical and Nuclear Chemistry | Abstract: | 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 Kd value (2.06 × 10−4 cm3 g−1) was achieved using CoY (zeolite type Y). The kinetics of technetium adsorption followed the pseudo-second order model. The TcO2 adsorption is mainly due to the hydrogen bonds between protons of the zeolitic structural OH groups (Bronsted acid center) and oxygen from the TcO2−. |
URI: | https://dspace.ffh.bg.ac.rs/handle/123456789/1848 | ISSN: | 0236-5731 | DOI: | 10.1007/s10967-018-5893-2 |
| Appears in Collections: | Journal Article |
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