Removal of Cs ions from aqueous solutions by using matrices of natural clinoptilolite and its safe disposal | Zendy

Mia Omerašević | Zendy; Jovana Ružić | Zendy; Nikola Vuković | Zendy; Uroš Jovanović | Zendy; Miljana Mirković | Zendy; Vesna Maksimović | Zendy; V. Dondur | Zendy

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Removal of Cs ions from aqueous solutions by using matrices of natural clinoptilolite and its safe disposal

Author(s) -

Mia Omerašević,

Jovana Ružić,

Nikola Vuković,

Uroš Jovanović,

Miljana Mirković,

Vesna Maksimović,

V. Dondur

Publication year - 2016

Publication title -

science of sintering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.309

H-Index - 25

eISSN - 1820-7413

pISSN - 0350-820X

DOI - 10.2298/sos1601101o

Subject(s) - clinoptilolite , zeolite , leaching (pedology) , aqueous solution , materials science , nuclear chemistry , ion , powder diffraction , metallurgy , chemistry , organic chemistry , soil water , environmental science , soil science , crystallography , catalysis

The possibility to use natural zeolite - clinoptilolite as a host material for radioactive Cs immobilization has been investigated. Cs-exchanged form of clinoptilolite which was prepared by treatment of clinoptilolite powder with 0.25 M CsCl solution was compacted. Both, powder and powder compact of exchanged clinoptilolite were thermally treated at 1200°C. The XRPD analysis showed that Cs was successfully immobilized after heat treatment by formation of stable cesium dodecaoxo-alumopentasilicate in both, powder sample and compact. The newly formed compound showed satisfactory Cs ions retention during leaching test. The sintered compact showed somewhat better resistance to Cs leaching than the thermally treated powder. The compressive strength of sintered compact was close to 200 MPa which is more than enough for easy handling and safe storage. [Projekat Ministarstva nauke Republike Srbije, br. 45012

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