Evaluation of Co and Zn competitive sorption by zeolitic material synthesized from fly ash using 60Co and 65Zn as radioindicators
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Zeolitic material prepared by hydrothermal treatment of brown coal fly ash was used for sorption separation of Co2+ and Zn2+ ions from single and binary solutions. Adsorption in single systems was rapid, pH dependent and follow the Langmuir isotherm. 3D sorption surfaces revealed competitive effects and mutual interactions between Co2+ and Zn2+ and significant preference for Zn2+ in binary system was confirmed. Surface retention and ion-exchange were most probably the principal mechanisms of Co2+ and Zn2+ removal. Zeolitic material with markedly high sorption capacity for Co2+ and Zn2+ can be a promising sorbent for removal of toxic metals and radionuclides.
KeywordsFly ash conversion Zeolitic material 60Co 65Zn Competitive adsorption
This work was supported by the Slovak Research and Development Agency under the Contract No. APVV-15-0098.
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Conflict of interest
The authors declare that there are no conflicts of interest.
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