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Technetium removal from the aqueous solution using zeolites A and Y containing transition metal ions Co2+ and Zn2+

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Authors
Hercigonja, Radmila V.
Vranješ-Đurić, Sanja
Mirković, Marija D.
Marković, Bojana M.
Maksin, Danijela D.
Marković, Bojana N.
Nastasović, Aleksandra B.
Article (Published version)
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© 2018, Akadémiai Kiadó, Budapest, Hungary
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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 Kdvalue (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 TcO2adsorption is mainly due to the hydrogen bonds between protons of the zeolitic structural OH groups (Bronsted acid center) and oxygen from the TcO2−.
Keywords:
technetium / zeolite / Adsorption / kinetics
Source:
Journal of Radioanalytical and Nuclear Chemistry, 2018, 317, 1, 215-225
Projects:
  • Magnetic and radionuclide labeled nanostructured materials for medical applications (RS-45015)
  • Advanced technologies for monitoring and environmental protection from chemical pollutants and radiation burden (RS-43009)
  • Oxide-based environmentally-friendly porous materials for genotoxic substances removal (RS-172018)

DOI: 10.1007/s10967-018-5893-2

ISSN: 0236-5731; 1588-2780

WoS: 000435823100022

Scopus: 2-s2.0-85048894765
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URI
http://link.springer.com/10.1007/s10967-018-5893-2
http://vinar.vin.bg.ac.rs/handle/123456789/7729
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